Study On The Curing Characteristics Of DHT Soil Stabilizer Stabilizing Fine Grained Soil

Since the industrial process, the increase in infrastructure construction, and a lot of industrial waste and by-products such as red mud, coal gangue is also more and more, the demand for green environment-friendly soil stabilizer is becoming more and more intense, so take full advantage of the nature of the industrial waste into soil stabilizing meets the requirement of sustainable development. DHT soil stabilizer is composed of fly ash, red mud, coal gangue and other industrial wastes with the development of the latest scientific and technological achievements.The main purpose of this experimental study is taking a series of experiments to explore the DHT soil stabilizer’s stability effect of fine grained soil. The soil test is the main method, which contains the basic physical and mechanical properties test of the plain soil, the compaction test with different dosage of DHT, the direct shear test with different dosage and curing ages and the permeability test with different dosage and curing ages. Depending on the result of the experiment, it showed that the fine grained soil which incorporated the DHT soil stabilizer has increased the shear strength and the impermeability. For the curing age, the longer, the better. And in the initial stage of curing, the solidified soil can show satisfactory engineering properties. Cohesion and Internal Friction Angle increase as mixing amount and curing age increase. Permeability coefficient decreased with mixing amount and curing age increase. And no matter how much dosage and curing age, the permeability coefficient is greatly reduced and it can decline two orders of magnitude. The effect of DHT soil stabilizer on improving the permeability of solidified soil was obvious.Therefore, this study provides a theoretical basis for the application of DHT soil stabilizer. The results of direct shear test and permeability test have definite directive significance to the application of DHT soil stabilizer in practical engineering. This is consistent with China’s energy-saving emission reduction, the development of circular economy industrial policy, under the premise of ensuring the quality of the project, but also reduces the construction of infrastructure investment. The research for red mud, coal gangue and other industrial waste resource utilization is willing to explore a green industry chain and will have extensive and far-reaching significance. The research results cannot only provide the scientific basis for decision making of industrial departments, but also have the guidance and reference significance to other similar experiments, so the research has broad application value and development prospects.