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

Abstract

Abstract: 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.

Key words: calcium carbide residue, fly ash, polypropylene fiber, unconfined compression test, pH test, environmental effect, solidified soil

CLC Number:

TU411.6

ZHAO Weiqi, FANG Rui, ZHOU Hao, LI Na, JIANG Ping. Unconfined Compressive Strength and Environmental Impact Assessment of Industrial Waste Stabilized Roadbed Soil[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(11): 3865-3875.

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