Utilization Of Magnesium Phosphate Cement And Marble Powder For Improving The Engineering Characteristics Of Soil

In this study,the effects of waste marble powder and magnesium phosphate cement on the properties of soil were investigated.The incorporation of waste marble powder(MP)and(MPC)magnesium phosphate cement as a novel additive,lead the significant environmental and economic contributions in soil stabilization.The key properties of natural soil were extracted and several tests,such as specific gravity,Atterberg limits,sieve analysis,unconfined compression strength test,Direct shear box test,modified Proctor test,California bearing ratio,and Scanning electron microscopy test were performed on soil samples prepared with different percentages of MPC and MP i.e.0%,2.5%,5%,7.5% and 0%,5%,10%,15% respectively.The results obtained suggest an improvement in the value of California bearing ratio and maximum dry density(MDD)and shrinkage strain using FBG sensor;and a decrease in optimum moisture content(OMC)and Atterberg Limits of the soil for all additives.Whereas the unconfined strength test was used to obtain desired comprehensive strengths following 7,14,28 days of curing time and for the SEM image of soil samples with a distinct amount of an admixture,in comparison with the natural soil,denser soil surface structure was observed.Furthermore,a comparison was made between OPC-MP mixtures tests,which indicates a potential to use MPC-MP as an admixture in stabilized soil.The overall laboratory immobilization/stabilization experiments showed that the application of marble powder and MPC in the treatment has resulted in a significant improvement in soil stability.While usability and effectiveness of MPC-MP are cost-effective and eco-friendly as the substitution of natural soil for deep foundations.