Experimental Study On The Solidification And Influence Factors Of Beach Clay

Zhejiang Province has rich beach land resources. The rational development and utilization of beach land resources can greatly improve the tense situation of land shortage. However, the composition of beach clay is very complex, and its engineering properties are poor. Before the infrastructure construction is done on it, the pretreatment must be carried to enhance its strength, reduce the deformation, and improve the engineering properties. There have many methods of beach clay treatment, of which the solidification method is a widely used method of foundation treatment. Therefore, in order to achieve sustainable development of resources and environmental protection, it is necessary to study the effect of curing agent and admixture on the curing effect of beach clay, to analyze the kind and content of curing agent and admixture on the mechanical properties of beach clay solidified soil, which has important theoretical and practical significance.On the basis of previous researches, this paper made a series of research work on the strength and deformation properties of beach clay solidified soil mixing with different main curing agent and additives through the unconfined compression test and conventional triaxial shear tests. The main contents and results are as follows:(1) The single doped test is done using cement as curing agent, triethanolamine, sodium hydroxide, water reducing agent, fly ash and blast furnace slag as admixtures, and the values of unconfined compressive strength of beach clay solidified soil. The influence scope and the curing effect of the additive dosage and curing time on the strength of the stabilized soil is studied, and the reasons for this phenomenon is explained.(2) The conventional triaxial shear test is done on the specimens made of different content of additive and the stress-strain curves and shear strength indexes of beach clay solidified soil under different additive content and curing age. The effect of curing agent content and curing age on the solidification of beach clay is analyzed.(3) Through the orthogonal test, the effect of the content and kinds of cement, sodium hydroxide, triethanolamine, water reducing agent, fly ash and blast furnace slag on the strength of beach clay stabilized soil, and the best proportion of its content is achieved. The influencing rule of different content of additives and curing age on the solidified soil stress-strain relationship is studied.(4) The indoor test results show that: on the basis of cement base content, the strength of beach clay stabilized soil is improved after mixed with a certain amount of sodium hydroxide, triethanolamine, fly ash and blast furnace slag, but its strength decreases with the increase of the content of additives if the content exceeds a certain value. This shows that the mechanical properties of solidified soil can be greatly improved after adding a certain amount of sodium hydroxide, fly ash and blast furnace slag as additives, but the content should be controlled within certain limits.