There are no restrictions on the penetration direction, and in-situ testing on the tunnel wall is possible.
Our company handles the air pressure pin penetration testing machine 'APP Tester', which drives a dedicated pin into concrete using air pressure, measures the penetration depth, and estimates the concrete strength. This is a simple testing method that replaces the pull-out testing machine used for initial strength testing of sprayed concrete, allowing for testing of the concrete sprayed on wall surfaces in situ without the need for test specimens. 【Features】 ■ Easy to handle, with no individual differences in test results ■ Stable penetration force obtained through air pressure ■ Use of two types of pins with different penetration resistances allows for a wide range of strength estimation (Pin A: 10–30 N/mm² Pin B: up to 10 N/mm²) *For more details, please download the PDF or feel free to contact us.
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Main Achievements ■ Construction of the Shizuoka No. 6 Tunnel on the Second Tomei Expressway ■ Construction of the Hida Tunnel Emergency Shaft on the Tokai-Hokuriku Expressway ■ Repair work on the Tsuruga Tunnel on the Hokuriku Expressway, among others *For more details, please download the PDF or feel free to contact us.
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For more details, please download the PDF or feel free to contact us.
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The work of Nippon Marts Co., Ltd. is to support customers by providing machinery for the sites they are dealing with. However, malfunctions and defects in machinery can occur no matter how thoroughly we prepare. This is why our responsiveness is what customers choose us for. We will respond to various situations with determination and a spirit of challenge, never backing down from any unreasonable demands.