Research On Sulphoaluminate Base Soil Stabilizer

The problem was solved of the road base soil stabilizer in northern region in this paper, and a called sulphoaluminate base of the road soil stabilizer materials had been developed, and the soil through its curing time could be applied to the northern city of roads and building the grassroots branch. At present, the curing agent in the soil of foreign countries develop faster, and it had been formed a considerable scale, but they had their own shortcomings, and still be complemented to constantly. In China, the study of curing agent in the soil in only twenty years, compared with a larger gap between foreign, it was at the initial stage in practical applications. Therefore, the high-performance and low-cost soil stabilizer was researched and developed to produce imperative.The effect of a variety of hardening accelerator, additives and lime, gypsum, rapid-hardening sulphoaluminate cement strength was researched first of all. The above materials were mixed in a single mixed or complex rapid-hardening sulphoaluminate cement, and the strength were tested for 1d, 3d and 28d. The strength were changed through the admixture of different types and content and then admixtures and dosage were obtained of rapid-hardening sulphoaluminate cement significant in early strength obviously.The exploration of the soil curing was tested subsequently, both local in Shenyang were accessed in accordance with the orthogonal design of soil mixed with rapid-hardening sulphoaluminate cement, G1 and G2. The two forming method were utilized high pressure and low pressure for forming in specimen molding, which unconfined compressive strength was tested in accordance with the relevant standards after cured, and the impact of molding pressure on the soil stabilization was investigated that a reasonable molding pressure was determined. The effect of unconfined compressive strength on the various additives and rapid-hardening sulphoaluminate cement solidified soil was researched, which the best ratio of sulphoaluminate based soil stabilizer content was manufactured in accordance with reasonable standards of molding pressure and related parts. Finally, the sulphoaluminate based soil stabilizer were used in two soils, and the effect of soil stabilizer on the stability of stabilized soil, the setting time and the properties of freeze-thaw cycle was tested in accordance with relevant standards.The results show that the optional additives, lime and gypsum could be on the rapid-hardening sulphoaluminate cement play the role, and the early strength would be better for combining use of several components. The best content of 10% was appropriate on sulphoaluminate based soil stabilizer in the fast hard sulfur content of cement. Low pressure molding could be more powerful expression sulphoaluminate soil stabilizer based fast curing effect for soil quality. The optimal content of lime and gypsum curing soil were 1.5% and 1% respectively; three admixtures W1, W2, W3 in black and loess of the best content were 3‰: 6%: 3% and 3‰: 2%: 1% respectively, that the unconfined compressive strength, stability and setting time meet the relevant standards, and freeze-thaw cycles were better than similar products. If the project was constructed at low temperatures, it is recommended to improve the curing conditions, minimize the setting time, increase of curing age in order to meet the needs of the stabilized soil construction and related standards better.