Compressibility Behavior of Cement Solidified Sludge Combined with Industrial By-products
In the aim of environmental protection and promoting the utilization of industrial by-products,we conduc-ted one-dimensional consolidation and scanning electron microscope(SEM)tests on cement solidified soil mixed with industrial by-products such as ground granulated blast-furnace slag,fly ash,and calcium carbide slag.We ex-amined the microscopic mechanism of industrial by-products'type,content,and curing age affecting the compres-sibility behavior of cement solidified soil.Results demonstrated a significantly positive effect of industrial by-prod-ucts on the compressibility behavior of cement solidified soil.As the content of industrial by-products increased,the void ratio and compression amount of solidified soil gradually decreased,while the yield stress increased.Moreover,the compressibility of soil solidified by cement with calcium carbide slag increased with higher content,whereas the compressibility of soil solidified by cement with fly ash and ground granulated blast-furnace slag initially increased and then decreased.The optimum content varied dependent on the type of industrial by-products.SEM test revealed that the improvement in compressibility can be attributed to cementation and filling effects.Additionally,we estab-lished a prediction model of compression amount based on the bounded function to offer reference for future con-struction and research.
industrial by-productssolidificationcompressibility behavioryield stressprediction model
国家科技期刊平台
NSTL
万方数据
维普
