The Study On Composite Powder Soil Cement Mechanical Properties And Durability

Soil-cement is mainly made of powder day or sand day which comes from river band and air deposited clay, minute quantity of admixtures and proper water. It is then made into specimens of diverse models and also used as low-carbon economy environmentally-friendly after the fixed curing age. Soil-cement is widely used in seepage control of canal, bedding of the road due to its easy access, less transportation and low cost. This thesis is based on the research of the powder day from the channel in Tuoketuo County, Hohhot City of Inner Mongolia Autonomous Region. It analyzes the effect and mechanism after strengthening mechanical properties and durability of the composite Mineral powder soil-cement by adulterating active material the composite Mineral powder into the ordinary cement and testing it in both indoor and outdoor simulation experiment, which provides related scientific foundation to the practical appliance in construction.Firstly, choose16group of optimize experimental group to go through orthogonal test and get the result after analyzing by statistics theory and software calculating such as intuitive analysis, variance analysis and SAS software. The result shows that the amount of cement and age affects cement-soil composite breeze of unconfined compressive strength most. Meanwhile I get the conclusion that with the addition of complex mineral powder, the strength of the composite Mineral powder soil-cement will first rise then set. The best amount is8%.Secondly, I study and analyze the changing curve of composite Mineral powder soil-cement, and make its constitutive relations as well.Thirdly, I study the durability of the specimens and analyze the influence of different amount of composite Mineral powder on the strength of the cement. At the same time, I make an intuitive description of the whole damage shapes and features of the specimens.At last, I explain in detail the curing mechanism of composite Mineral powder soil-cement from two aspects, concerning the proper pattern, features and interrelationship among cement, powder day and composite Mineral powder. From the physical aspect I analyze the curing mechanism and solidification feature, while from the micro aspect I study the internal mechanism of chemical reaction and solidifying shape of composite Mineral powder soil-cement.