三和グランド List of Products and Services

"13 Specific Measures Against Climate Change" [Conservation of Natural Environment] We will provide products that are friendly to disaster reduction and the precious local resources of "water and greenery." [Permeability and Water Retention] By allowing rainwater to "permeate and return" to the ground, we promote the stabilization of groundwater sources and the growth of vegetation. Stored water helps mitigate the heat island phenomenon. "12 Responsibility to Create and Responsibility to Use" [Reduction of Environmental Impact] We will provide durable products using recycled materials. [Environmental Quality] Blast furnace crushed slag is a specified procurement item under green procurement methods. [Durability] There are many cases where the paving function has been maintained for over 15 years. "11 Building Sustainable Communities" [User-Friendly] We will provide safe, secure, and comfortable spaces for children, the elderly, and people with disabilities. [Universal Design] High flatness supports barrier-free access, creating a comfortable walking environment for everyone. [Safety] Safe and secure paving materials using "harmless" blast furnace crushed slag. ■ Case Studies Osaka Castle Park (Construction in 2023) Dejima Dutch Trading Post Ruins (Construction in 2022) Aoyama Cemetery (Construction in 2021) *For more details, please contact us.

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In the newly developed extension of Wadahori Park, located in Suginami Ward, Tokyo, permeable pavement and water-retaining colored sand materials have been adopted. A few years ago, we completed a project in another area of the same park, and we believe this is a recognition of that work.

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At Funado Park in Sakai City, Osaka Prefecture, permeable pavement and water-retaining pavement material colored sand have been adopted in two phases. It is being used on the outer perimeter path, and one of the features of the permeable pavement and water-retaining pavement material colored sand, its excellent permeability, seems to be well-regarded for its ability to minimize the formation of puddles.

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At the Komorebi Green Space in Setagaya, Tokyo, permeable and water-retaining colored sand paving materials have been adopted. This paving blends seamlessly into the lush landscape and has minimal impact on the growth of surrounding plants.

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In the Wadahori Greenway located in Nerima Ward, Tokyo, permeable pavement and water-retaining colored sand have been adopted. Previously, the greenway had a dark atmosphere, but with the complete renewal, it has transformed into a bright and easy-to-walk path.

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In the planting area on the sidewalk facing the public school in Shinagawa Ward, permeable pavement and water-retaining pavement colored sand have been adopted. Initially, it was planned to use joint material, but due to the tree roots, the thickness could not be achieved, so it was changed to a cutter joint. The ability to respond flexibly is the strength of Sanwa Grand's permeable and water-retaining pavement materials.

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In Chiba City, Chiba Prefecture, on the pedestrian-only road near Mitsuwadai Station of the Chiba Urban Monorail, we have adopted permeable pavement and water-retaining pavement material colored sand on Mitsuwadai Route 59. Since more than 20 years have passed since the construction, some areas have been repaired, but the majority of the permeable pavement and water-retaining pavement material colored sand has been used as is since that time. *Photographed in April 2023.

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In the expansion area of Tokyo Metropolitan Rokusen Park located in Higashi Kurume City, we have adopted permeable pavement and water-retaining pavement material in color sand. The sandy beige color of the planting flowers and the permeable and water-retaining pavement material creates a soft, earthy atmosphere that complements each other well.

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In the renovated "Flower Road" area of the Osaka Prefectural Neyagawa Park located in Neyagawa City, Osaka Prefecture, permeable pavement and water-retaining colored sand have been adopted. There are health playground equipment around the permeable pavement and water-retaining colored sand, and it seems to be very lively during holidays.

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In 1997, permeable pavement and water-retaining colored sand were adopted for the walking path within the residential area near JR Yokohama Line's Hachioji Minamino Station, developed as Hachioji New Town. More than a quarter of a century has passed since the construction, but there has been almost no significant damage, and the condition is very good. This truly exemplifies one of the characteristics of permeable pavement and water-retaining colored sand: longevity. *Photo taken in May 2023.

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We have adopted permeable pavement and water-retaining pavement colored sand for the exterior of the mixed-use building "D Tower Toyosu," located directly across from Toyosu Market, which houses hotels and training facilities. The calm color tones blend well with the surrounding greenery, creating a very pleasant atmosphere.

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We have adopted permeable and water-retaining colored sand paving materials for the walking paths in the plum grove of Osaka Castle Park, located at the foot of Osaka Castle, a symbol of Osaka, and a place of relaxation for the citizens. It seems that many people have enjoyed walking on the permeable and water-retaining colored sand, and we have received positive feedback about it.

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One of the three burial mound groups in Moroyama Town, Saitama Prefecture, is the Nishito Burial Mound Group, where permeable and water-retaining colored sand paving materials have been adopted for the Nishito No. 2 mound. A quarter of a century has passed since the construction, but there has not been significant damage, and it is still in use as an active pavement.

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At the ancient temple Daianji in Nara, famous for its cancer prevention, permeable and water-retaining colored sand paving has been adopted. Although it has just been installed and walking on the permeable and water-retaining colored sand paving is not yet possible, it seems that visitors have been heard saying that it looks beautiful.

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The permeable and water-retaining colored sand paving materials have been adopted at the Kawaguchi City Green Center located in Kawaguchi City, Saitama Prefecture. They are used in the northern area, which reopened last spring, including the Insect Forest, Adventure Forest, and Lively Square.

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It extends from far-off Tottori Prefecture to Kyoto Prefecture, and we have adopted permeable pavement and water-retaining pavement material colored sand in the San'in Kaigan Geopark, which is also registered as a UNESCO Global Geopark. The color harmony with the sandy beach is remarkable.

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In Toyo Park, located at the foot of Nagahama Castle, a representative tourist destination and symbol of Nagahama City in Shiga Prefecture, permeable pavement and water-retaining colored sand materials have been adopted. We have heard that the park users have given positive feedback, which is very encouraging for us.

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We have adopted permeable and water-retaining colored sand pavement materials for the paths in Hiroshima's Peace Memorial Park. There are many travelers from abroad, and pedestrians and cyclists are constantly present. We feel very honored to have our materials used in this park, which is representative of Hiroshima and is also a famous cherry blossom viewing spot, located close to the city center.

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In Minato Ward, Tokyo, right next to Tokyo Midtown, we have adopted permeable and water-retaining colored sand pavement materials in the sloped area of Hinokicho Park. It has been about 12 years since the installation, so there are some areas with cracks, but the walkability has been maintained. In urban parks, natural colors that evoke an urban image are often used, and this location has also chosen those colors.

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At the newly established Fukaya Terrace Park, located very close to Fukaya Hanazono Station in Fukaya City, Saitama Prefecture, permeable pavement and water-retaining colored sand have been adopted. This new park opened simultaneously with an adjacent agricultural experience facility. The sand beige color, which is reminiscent of soil, matches the concept of the facility and looks appealing. An outlet mall is set to open in October right across the road, making this area likely to gain even more attention in the future.

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Permeable paving material colored sand has been adopted at Haneda Innovation City. The newly constructed buildings, green grass, and natural-colored sand match well, creating a very calm atmosphere. It is being used in the pathway section of the Artist Village Zone, and it is expected to become lively in the future, allowing many people to walk through.

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At the 2022 National Urban Greenery Fair "Kumamoto Flower and Greenery Expo," the Japanese garden at Kumamoto City Zoological and Botanical Gardens, one of the venues, has adopted permeable and water-retaining paving material colored sand. It has been designed to maintain the "Japanese" atmosphere while also being easy to walk on.

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We have been adopted for the riverside promenade of the Kamo River, a representative river in the ancient capital of Kyoto and a famous tourist spot. After the completion of this project, we received direct feedback from local residents saying, "We really like it." This was not only a great encouragement for us but also a moment when we felt we were able to contribute to the local community.

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In Isezaki City, Gunma Prefecture, at the representative park known as Isezaki Citizens' Forest Park, permeable pavement and water-retaining pavement material colored sand were adopted in 2000. More than 20 years have passed since the installation, and there have been no significant damages that would prevent walking, and it is still actively used as a path in the park, demonstrating one of the characteristics of colored sand: its durability. *Photo taken: May 2021

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We have adopted permeable paving material colored sand for the pathway of the newly established campsite next to JR Agatsuma Line's Kawaharayu Onsen Station. Camping and barbecuing in the great outdoors must be very pleasant. In this context, we are providing a modest assistance by offering easy-to-walk garden paths.

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A historic cemetery established in the 7th year of the Meiji era, Tokyo Aoyama Cemetery. In this cemetery, we have adopted permeable and water-retaining colored sand pavement materials for the newly developed square along Higashi San-dori. While it presents a different image from the traditional Aoyama Cemetery, the natural colors create an urban atmosphere. Thanks to the permeable and water-retaining pavement, puddles are less likely to form even on rainy days, making it a more accessible area compared to the old-style cemeteries and graveyards.

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■Natural Environment Conservation... We will provide products that are friendly to "water" and "green," which are valuable resources in the region, and contribute to disaster reduction. - Permeability - Water retention ■Reduction of Environmental Impact We will offer products made from recycled materials and those that can be used for a long time. - Environmental friendliness - Durability ■User-Friendly... We will provide a safe, secure, and comfortable space for children, the elderly, and people with disabilities. - Universal design - Safety For more details, please see the link below.

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The efforts for green infrastructure in the park shown in the photo have been recognized. The permeable and water-retaining paving material 'Color Sand' utilizes 'blast furnace crushed slag,' an aggregate with a fine porous structure, achieving high permeability and water retention. Depending on environmental conditions, its durability is approximately 15 to 20 years. It has a texture close to that of soil, making it easy to blend into natural landscapes as 'slag pavement.' Choosing a gray tone allows it to match urban landscapes as well. It allows rainwater to permeate and return to the ground, alleviating the 'heat island phenomenon' in urban areas. It is designed to minimize puddles and has a high slip resistance, making it easy to walk on even during and after rainfall. [Features] - Excellent functionality (permeability, water retention, freeze resistance, durability, slip resistance) - Uses aggregates specified for procurement under the Green Purchasing Law, with a recycling rate of over 80% - Meets the 'surface requirements' needed for sidewalks and bicycle paths - Over 1,800 instances of adoption in 'public works' ordered by municipalities nationwide - Perfect for the recently highlighted initiatives of 'green infrastructure' (permeability and water retention) ★ Currently, we are offering a 'case study collection' for parks and building exteriors. You can view it immediately via [PDF download].

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In 1997, shortly after the establishment of Sanwa Grand Co., Ltd., our colored sand was adopted at "Akebono Children's Forest Park" in Hannō City, Saitama Prefecture. This park received the Minister of Construction Award at the 14th Urban Park Competition. Since then, it has been introduced to many people as a representative example of our adopted sites. About 20 years later, during the renewal, permeable and water-retaining colored sand was once again chosen for the park path paving. 【Features】 ■ Excellent permeability, water retention, and freeze resistance ■ Over 80% recycling rate due to the use of aggregates specified in the Green Purchasing Law ■ Meets the "surface requirements" needed for sidewalks and bicycle paths ■ Over 1,500 adoption cases in "public works" ordered by municipalities nationwide *For more details, please refer to the PDF materials or feel free to contact us.

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The permeable and water-retaining paving material "Color Sand" is a permeable high furnace slag paving material characterized by high weed prevention, permeability, and water retention. By laying it in paths of cemeteries and similar areas, maintenance management is simplified, allowing for a reduction in management costs. 【Do you have any of these concerns?】 ■ Weeds grow a lot in spring to autumn... ■ Cleaning up fallen leaves in autumn is a hassle... ■ I don't live near the grave, so I can't take care of it... ⇒ We can solve these problems! *For more details, please download the PDF or feel free to contact us.

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A new paving material that combines single-sized crushed stone and porous high furnace water-quenched slag, possessing robustness, durability, water retention, and permeability. The interlocking of aggregates with different particle sizes achieves a bending strength of 40 kgf/cm². The "latent hydraulicity" of high furnace water-quenched slag provides excellent long-term strength (durability). 【Features】 ■ Bending strength exceeds 40 kgf/cm², achieving an extremely high value among pedestrian paving materials. ■ High durability is exhibited due to the interlocking of aggregates and the "latent hydraulicity" of high furnace water-quenched slag. ■ At a thickness of 7 cm, it stores approximately 16 liters of water per square meter! ■ Quickly permeates rainwater, making it difficult for puddles to form, allowing for comfortable walking even during and after rain. ■ Mitigates the heat island phenomenon. ■ Enriches groundwater and promotes plant growth. ■ The fine surface texture makes it slip-resistant when wet, providing easy walking. <Examples of Use> Building exteriors (terraces) / Residential exteriors / Schools / Parking lots / Commercial facilities Urban parks / Housing exhibitions / Parking areas and roadside stations / Event spaces, etc. *For more details, please contact us or download the PDF.

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We will explain the reasons why the "permeable and water-retaining blast furnace slag pavement (color sand)" has maintained its paving functionality even after more than 15 years since installation. Color sand meets all five "pavement requirements" expected for pedestrian areas and maintains high performance among pedestrian pavements. The characteristic of the blast furnace water-quenched slag used as aggregate, "latent hydraulicity," not only enhances strength but also provides excellent permeability and water retention due to its porous structure. Furthermore, to prevent the deterioration of the pavement surface, it releases pressure caused by the volume expansion of moisture during freezing, which occurs due to repeated freeze-thaw cycles in winter. For more information, including "representative examples of sites that have maintained paving functionality for over 15 years," please refer to the external links. 【Technical Information Introduction】 ■ 20 years since the development of color sand ■ High performance maintained as pedestrian pavement ■ Technical reasons for maintaining paving functionality after more than 15 years / representative examples of sites *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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This document explains the characteristics and benefits of the blast furnace crushed slag used in "permeable blast furnace slag pavement (color sand)." The "blast furnace crushed slag" used as aggregate in our paving materials is a byproduct generated simultaneously when producing pig iron from a blast furnace at major steel manufacturers. It can be easily separated as it floats on top of the molten pig iron. In addition to contributing to environmental load reduction, it has characteristics such as excellent gradation balance due to its uniform particle size. Further explanations on topics such as "What is steel slag?" and "Characteristics and general uses of blast furnace slag" can be found through external links. 【Technical Information Introduction】 ■ What is "steel slag"? ■ Characteristics and general uses of "blast furnace slag" ■ Reasons for adopting "blast furnace crushed slag" - Environmental load reduction, porous shape, latent hydraulicity, high internal friction angle, uniform particle size, safety *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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This document explains the technical basis for the permeability coefficient in "permeable blast furnace slag pavement (colored sand)." Our paving materials use granulated blast furnace slag as a raw material, which falls under the classification of sand and gravel. Therefore, we conducted the "constant head permeability test" to measure the permeability coefficient. The result of the constant head permeability test showed a measured value of 2.56×0.01 cm/sec. Thus, the required permeability coefficient for the sidewalk area in terms of "permeability" is a public standard value of 1.0×0.01 cm/sec. Our material exceeds this standard value by more than double, proving that it sufficiently meets the permeability performance required for sidewalk areas. [Overview] ■ The permeability coefficient was measured in accordance with the "Soil Permeability Testing Method" based on JISA1218. - Constant head permeability test... Applied to soils with relatively high permeability coefficients (sand and gravel). - Falling head permeability test... Applied to soils with relatively low permeability coefficients (clay, silt, etc.). ◎ Exceeds the standard value and sufficiently meets the permeability performance required for sidewalk areas. *For more details, please refer to the PDF document or external link page, or feel free to contact us.

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This document explains the technical basis for the "permeable and water-retaining blast furnace slag pavement (color sand)" being compliant with "universal design." The target value for slip resistance is set at BPN 40 or higher on wet surfaces, and the color sand pavement exceeds 62, thus meeting the target value. Additionally, as it is a site-cast pavement, it does not pose obstacles for pedestrians and wheelchair users, allowing for smooth curved construction, making it suitable for wheelchair users and visually impaired individuals. Furthermore, it excels in shock absorption, permeability, and water retention, with the main factors contributing to overall "walkability" being elasticity, foot feel, and slip resistance. It is stated that when selecting walking surfaces, it is necessary to evaluate overall ease of walking and running. **Features** - Exceeds the target value for slip resistance - Allows for smooth curved construction - Excellent shock absorption and soft walking sensation - Maintains permeability without creating puddles that hinder walking - Highly superior in water retention capacity and retention time due to its porous structure *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.*

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We will explain the technical basis of the "Permeable and Water-retaining Blast Furnace Slag Pavement (Color Sand)" that achieves both permeability and water retention. All of our paving materials use "water-quenched blast furnace slag" as the main aggregate. The aggregate itself has a fine porous structure, allowing it to provide both permeability and water retention. While typical permeable paving materials allow water to pass through at "points," our paving materials enable permeability across "surfaces" due to the nature of the aggregate itself, resulting in less clogging and maintaining permeability performance over a long period. Additionally, by cleaning with high-pressure washers, the permeability can be restored to about 80%. Further explanations regarding "permeability performance" and "water retention performance" can be found through external links. 【Introduction to Technical Information】 ■ Reasons for achieving both permeability and water retention ■ Permeability performance ■ Water retention performance ■ Our product lineup *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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This document explains the benefits of "permeable and water-retaining blast furnace slag pavement (colored sand)" during the winter season. Not only does it function as a measure against summer heat, but its permeability and water retention capabilities also provide benefits in winter. There is less freezing after the snow melts, and the porous structure of the "granulated blast furnace slag" used as aggregate absorbs the expansion pressure during freezing through countless voids, making it resistant to freeze-thaw cycles. Even if the retained water freezes, the durability of the surface does not decrease. Further explanations on "effects of winter permeability and water retention functions," "suppression of the summer heat island phenomenon," and "our product lineup and examples of use" can be found through external links. 【Technical Information Introduction】 ■ Suppression of the "heat island phenomenon" in summer ■ Effects of winter permeability and water retention functions - Less freezing after snow melts - Easier snow removal - The water retention function moistens the dry winter air ■ Our product lineup and examples of use *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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This document explains the installation of the "filter layer" in "permeable high furnace slag pavement (color sand)." The pavement structure of color sand utilizes "water-quenched slag for civil engineering" as the filter layer. Since this "artificial sand" is produced at steelworks of major steel manufacturers, it has minimal quality variation and possesses characteristics not found in natural soil. This water-quenched slag is porous and has an angular shape, providing important geotechnical engineering features such as "lightweight," high "shear resistance," and "permeability." **Effects of Using Water-Quenched Slag for the Filter Layer:** - The particles have a porous shape, resulting in excellent permeability and water retention. - There is no strength reduction due to infiltrating water, and even if the moisture content decreases, no settlement occurs. - With a design CBR of over 20%, strong support capacity is achieved. *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.*

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This document explains the reasons why "permeable and water-retaining pavement materials (color sand)" are strong against "freeze-thaw" cycles. Color sand is a pedestrian pavement material that possesses permeable and water-retaining functions while being sufficiently resistant to the repeated effects of freeze-thaw cycles during winter, making it "strong against frost damage." Among our pavement composition, the "filter layer" made from high furnace slag pavement, when used alone, has a significant effect in suppressing "frost heave phenomena." Furthermore, in freeze-thaw tests conducted at the Central Testing Laboratory of the Building Materials Testing Center, no cracking or destruction occurred even after completing 200 cycles. 【Excellent Features of the Aggregate (High Furnace Slag)】 ■ Porous Structure - Numerous fine voids release pressure caused by volume expansion during freezing. ■ Potential Hydraulic Properties - The main components of water-cooled slag (silica, alumina, lime, magnesia) solidify over time due to repeated water penetration. ◎ Sufficiently resistant to the repeated effects of freeze-thaw cycles. *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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This document explains the "technical basis" for the pavement composition of "permeable high furnace slag pavement (colored sand)." This pavement is not intended for "roadway pavement" aimed at heavy vehicle traffic, but rather is specifically designed for "pedestrian pavement" to accommodate pedestrian passage. Therefore, as a public standard, it complies with the "Pavement Design Manual," Chapter 7, which specifically defines the selection, classification, and pavement structure for pedestrian-related road pavements, including "pavements for sidewalks and bicycles." Additionally, explanations regarding "the basis for pavement composition and thickness" and "classification as pedestrian-related road pavement materials" can be found via external links. [Introduction of Technical Information] ■ Classification of pavement use ■ Basis for pavement composition and thickness ■ Classification as pedestrian-related road pavement materials *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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This document explains the similarities and differences between "permeable and water-retaining blast furnace slag pavement (colored sand)" and "masado soil pavement." Both have common functions as permeable and water-retaining pavements, and they are often confused because the aggregate particle size ranges from 5mm to 0mm, resulting in a similar appearance. Additionally, as pavement materials for pedestrian roads, they show similarities in major applications such as sidewalks, walking paths, and park paths, as well as in design pricing. For more detailed explanations regarding the differences, please refer to the external link. 【Technical Information Overview】 ■ Similarities - Appearance, major applications, design pricing ■ Differences - Pavement aggregate, permeability, frost resistance, bending strength, pavement color, durability *For more details, please refer to the PDF materials or external link page, or feel free to contact us.

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This document explains the differences in permeability and water retention functions between "permeable and water-retaining blast furnace slag pavement (color sand)" and "porous concrete pavement." Porous concrete pavement allows for point-based permeability, while color sand enables surface-based permeability, distinguishing it as a new type of permeable pavement that can be differentiated from conventional permeable pavements. Its advancement and novelty have been recognized, and it has also obtained a "patent." Additionally, explanations regarding "water retention performance and its effects" and "the duration of sustained permeability performance" can be viewed through external links. [Technical Information Introduction] ■ Permeability performance ■ Water retention performance and its effects ■ Duration of sustained permeability performance *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.

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The permeable and water-retaining paving material "Color Sand" utilizes finely porous aggregate "Blast Furnace Water-quenched Slag," achieving high permeability and water retention as a landscape paving material. Depending on environmental conditions, its durability is approximately 15 to 20 years. It has a texture similar to soil, making it easy to blend into natural landscapes as "slag pavement." Choosing a gray tone can match urban landscapes as well. It allows rainwater to permeate and return to the ground, alleviating the "heat island phenomenon" in urban areas. There have been instances where surface temperatures were about 10°C lower compared to asphalt paving. It is designed to minimize puddles and has a high slip resistance, making it easy to walk on even during and after rainfall. 【Features】 ■ Excellent functionality (permeability, water retention, freeze resistance, durability, slip resistance) ■ Utilizes aggregates designated for procurement under the Green Purchasing Law, with a recycling rate of over 80% ■ Meets the "surface requirements" needed for sidewalks and bicycle paths ■ Over 1,800 instances of adoption in "public works" ordered by municipalities nationwide ★ Currently, we are offering a "case study collection" for parks and architectural landscaping. You can view it immediately via the 【PDF download】.

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Permeable and water-retaining paving material colored sand is an environmentally-oriented new pedestrian road paving material that uses "blast furnace crushed slag," a byproduct of steelmaking, as the main aggregate, along with cement additives and inorganic pigments as secondary materials. These components are mixed and compacted using a roller machine to finish the product. It allows precious water resources of the Earth, namely "rainwater," to permeate and be replenished underground, mitigates the "heat island phenomenon" in urban areas, revives spring water, promotes the growth of trees and flowers, and contributes to the creation of urban environments rich in "water and greenery." 【Features】 ○ Excellent permeability ○ No "puddles" during rainfall, non-slip ○ Mitigates the heat island phenomenon ○ Maintains high "water retention" ○ Soft walking sensation For more details, please contact us or download the catalog.

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Color sand is an environmentally friendly new pedestrian road paving material that uses "blast furnace crushed slag," a byproduct of steelmaking, as the main aggregate, combined with cement additives and inorganic pigments as supplementary materials. These components are mixed and compacted using a compaction machine to finish the product. It allows rainwater, an invaluable water resource for the Earth, to permeate and be replenished underground, mitigates the "heat island phenomenon" in urban areas, revives spring water, encourages the growth of trees and flowers, and contributes to the creation of urban environments rich in "water and greenery." 【Features】 - Excellent permeability - No puddles during rainfall, non-slip - Mitigates the heat island phenomenon - Maintains high water retention - Soft walking sensation For more details, please contact us or download the catalog.

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