What is soil cement for erosion control?
Soil cement for erosion control was developed to effectively utilize local soil and sand in the promotion of erosion control projects. It refers to a material produced by mixing local soil and sand with cement, solidifying agents, and water at the construction site. Its characteristic is not a formulation aimed at increasing density, but rather a formulation (sand, cement, solidifying agents, water) that activates the hydration reaction of cement, resulting in a compressive strength exceeding 2,000 kN/m². Why does it harden!? The reason soil cement for erosion control hardens is that the "components" that make up the cement react with water to generate various hydration products. This is called the "hydration reaction." It has been confirmed that the strength of soil cement for erosion control increases over decades.
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Benefits of Utilizing Soil Cement for Erosion Control ● Benefit 1: Reduction of Excavated Soil and Sand: By utilizing local soil and sand, there is less need for disposal sites for soil and sand. ● Benefit 2: Contribution to Reducing Environmental Impact: By significantly reducing the number of vehicles such as concrete trucks, it is possible to decrease carbon dioxide emissions, noise, vibration, and dust, thereby reducing environmental impact. Additionally, safety for nearby residents, tourists, and hikers can be improved. ● Benefit 3: Adaptability to Various Construction Conditions: Since local soil and sand can be mixed on-site to create construction materials, there is no need for concrete delivery, making it suitable for sites where concrete procurement is difficult, where planning for construction access routes is challenging, or where disposal of excess soil is problematic. ● Benefit 4: Shortening of Construction Period: The erosion control soil cement method does not require the curing period necessary for concrete construction, allowing for continuous work. This can shorten the construction period compared to concrete construction. ● Benefit 5: Cost Reduction: Utilizing local soil and sand as construction materials leads to significant cost savings.
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Disadvantages 1: Preparation period before construction is essential The use of soil cement for erosion control requires a mix test and trial construction before the actual work. Generally, a period of about 60 days is needed for these implementations. 2: Consideration of site conditions is necessary for mix design If mix tests are conducted without considering the various conditions of the construction site, it may not achieve the required quality, leading to the need for redoing the mix tests, which can significantly impact costs and construction time. 3: Quality control on-site requires effort If quality control is not adapted to the various changes in conditions such as terrain, geology, and climate at the construction site, the required quality may not be achieved. To prevent such issues, it is necessary to invest effort in quality control on-site.
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Compression test of soil-cement specimens for erosion control.
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Continuing to provide safety and security in people's lives. Moving forward, we will contribute to the development of social infrastructure to realize a society where people can live with peace of mind through soil cement technology.