工业废料稳定路基土的无侧限抗压强度及环境影响评价

随着社会的发展,道路工程建设规模日益庞大,常用的石灰、水泥等固化剂价格较高,然而电石渣、粉煤灰这两种工业废料应用于道路建设中,将很好地提高资源的回收再利用率,同时降低建设成本。本文研究了电石渣和粉煤灰固化土的最优配合比,并探讨了电石渣代替石灰用于固化土的可行性,另外,在电石渣-粉煤灰固化土中掺入聚丙烯纤维,探究了聚丙烯纤维的最优掺量。无侧限抗压试验结果表明,电石渣与粉煤灰的最优配比为1:1,聚丙烯纤维的最优掺量为0.6%(质量分数)。在此基础上探究了电石渣-粉煤灰固化土在雨淋条件下对环境的影响程度。pH试验结果表明,电石渣-粉煤灰固化土的pH值最大为12.28,其环境影响程度满足国家标准规范要求,可以在实际工程中得以应用。此研究为工业废料应用于道路基层提供了一定的借鉴意义。

Unconfined Compressive Strength and Environmental Impact Assessment of Industrial Waste Stabilized Roadbed Soil

With the development of modern society, the scale of road engineering construction is becoming larger and larger, and the price of commonly used curing agents such as lime and cement is high. It is a good way to apply calcium carbide residue (CCR) and fly ash (FA) to road construction, which can not only improve the recycling rate of resources, but also reduce the construction cost. In this paper, the optimum mix proportion of CCR and FA in solidified soil was explored, and the feasibility of CCR replacing lime to solidify soil was discussed. In addition, adding polypropylene fiber into the CCR-FA solidified soil can further improve the mechanical properties of CCR-FA solidified soil, so would also be explored the optimal content of polypropylene fiber. The results of the unconfined compression test show that the optimal ratio of CCR and FA is 1:1, and the optimal content of polypropylene fiber is 0.6% (mass fraction). On this basis, the impact of CCR-FA solidified soil on the environment under rain conditions was investigated. The pH test results demonstrate that the maximum pH value of CCR-FA solidified soil is 12.28, which meets the requirements of national standards and can be applied in actual projects. The research results serve as a solid foundation in utilizing industrial waste as road base materials.