Experimental Study On Mechanical Properties Of Cement Laterite And Its Analysis Of Asymptotic Homogenization

As a new type of construction material with appropriate behavior and economy, cement- soil is widely applied in many engineering field. It has many merits, such as wide raw material source, improving soil texture, changing strength and having plasticity. Because macroscopical mechanics behavior of cement- soil is directly affected by micro-mechanism, the asymptotic homogenization theory will provide more dependable and reasonable safety guarantee to cement- soil construction when it is applied in design of structure. Experimental study of its macroscopical mechanics behavior and analysis of asymptotic homogenization of cement- soil and Cement Mixing Pile are the main work of this dissertation.Firstly, according to the unconfined compression tests on the latertie cement with different cement ratio and different curing time, and studying on rules of the unconfined compression, elastic modulus and secant modulus, and summarizing of the characteristic of stress-strain diagram of cement- soil, this dissertation analyzes the influence of cement ratio and curing time on mechanics behavior of cement-soil. The tests provide some data to the application of this kind of cement- soil.Secondly, elastic modulus and elastic strength of cement-soil are analyzed with asymptotic homogenization theory, and a simplification calculation model of the cement- soil is put forward .Then some results are calculated with a computational program of finite element method, and comparisons of the experimental results and the calculated results are presented.Thirdly, according to the results with asymptotic homogenization theory, cement mixing pile is analyzed, and comparisons of the results with asymptotic homogenization theory and other methods are presented.Finally, some rules of expetiment and asymptotic homogenization theory are summed and some suggestions about practice have been provided.