Awarded the "Minister of Land, Infrastructure, Transport and Tourism Award" at the 2008 Academic and Government Collaboration Achievement Awards.
The "Bontelan Method" is a construction technique that improves the handling properties, durability, and earthquake resistance of soil that has traditionally been deemed unsuitable for use as fill. This is achieved by mixing fiber-based soil improvement materials called "Bonfiber" and solidifying agents into the soil. It is an environmentally friendly method that aims to enhance the quality of sludge generated during construction and repurpose it as excellent soil for reuse. The effectiveness of Bontelan improved soil as a ground material for earthquake resistance was demonstrated, as no damage was reported in civil engineering structures using this method during the Great East Japan Earthquake. **Features** - Significant cost reduction compared to conventional methods - Reusable as highly durable improved soil - Contributes to rapid disaster recovery - NETIS registration, registration number TH-020042-V - Collaborative research results from industry-academia-government → Professor Hiroshi Takahashi, Graduate School of Environmental Studies, Tohoku University For more details, please contact us or download the catalog.
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**About the Long-Term Stability of Bonfiber** ○ Biodegradability Test Results → It has been confirmed that it does not decompose in high alkaline environments with a pH of 9.5 or higher. ○ Results of Artificial Rainfall and Acid Rain Simulation Tests → Even after exposure to rainfall equivalent to approximately 50 years and acid rain equivalent to approximately 160 years, it has been confirmed that the interior of the improved soil maintains a high alkaline environment. ○ On-Site Verification Results by a Third Party → It has been clarified that Bonfiber does not decompose due to the interior of the Bonteran improved soil maintaining a high alkaline environment for a long period. ● For more details, please contact us or download the catalog.
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Since its establishment in 1924, Suna Hara Corporation has been closely connected to the local community and has solidified its position as a comprehensive construction contractor over many years. While questioning "What should the construction industry of tomorrow be like?", we aim to explore "What is true richness in modern life?" through new nation-building and social development, and continue to propose this to our customers. There is currently a demand for better social infrastructure, as envisioned by the "Public Works Quality Law." We strive for higher technical skills, quality, and productivity, and with the motto of "providing safety, security, and good products," we hope to assist in promoting business while harmonizing with the surrounding community.