Introducing technical information about permeable blast furnace slag pavement "Color Sand"!
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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basic information
【Examples of Construction in Cold and Snowy Areas】 ■ Aizutajima Town, Fukushima Prefecture - Construction: Year 2000 - Maximum Snow Depth: 113 cm - Minimum Temperature: -12.3℃ ■ Asahi Village, Yamagata Prefecture - Construction: Year 1998 - Maximum Snow Depth: 245 cm - Minimum Temperature: -15.1℃ Properties that have undergone construction 13 to 15 years ago continue to withstand the repeated freeze-thaw cycles and function adequately as permeable and water-retaining pavement. Additionally, there have been no reports of frost damage in properties constructed in regions where temperatures drop below freezing during winter. *For more details, please refer to the PDF materials or external link pages, or feel free to contact us.
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For more details, please refer to the PDF materials or external link page, or feel free to contact us.
Detailed information
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Construction examples in cold and snowy areas Aizutajima Town, Fukushima Prefecture <Photographed in 2012>
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Construction examples in cold and snowy areas Asahi Village, Yamagata Prefecture <Taken after the rain in 2012>
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Company information
The permeable and water-retaining pavement materials developed by Sanwa Grand Co., Ltd. allow rainwater, an invaluable water resource for the Earth, to permeate and be returned to the ground, thereby alleviating the "heat island phenomenon" in urban areas during the summer, revitalizing spring water, promoting the growth of trees and flowers, and restoring "water and greenery" in the city, creating a pavement that is friendly to both people and nature. Our company aims to contribute to society as a member of a company that creates a comfortable environment through the dissemination of these environmentally friendly pavement materials, which excel in permeability and water retention. Our pavement materials are also ideal for areas with high social needs, such as "barrier-free" access, "disaster evacuation routes," "weed prevention measures," and "school route improvements."