Forecasting the mechanical properties of soilcrete using various simulation approaches

Soilcrete properties modified with two types of polymer up to 0.20 % (% wt. dry weight of cement) were tested and quantified. The stress-strain curve of modified soilcrete with polymers was examined for curing periods up to 28 days and modeled using two different mathematical models. The flowability of the soilcerte was maintained within the range of 105 to 110% as recommended by ASTM standard. Polymers decreased the water/cement ratio (w/c) by 14.5 to 25.5%, based on the type and amount of polymers. The compressive strength and modulus of elasticity of soilcrete increased by 72% to 153% and by 55% to 195%, respectively, when the soilcrete was modified with 0.20% of polymers. The nonlinear Vipulanandan p-q equation was employed to predict the stress-strain behavior of the modified soilcrete with polymers and was compared with the beta model prediction. Based on the statistical evaluation tools, the Vipulanandan p-q model predicted the stress-strain relationships better than beta model. Linear (LM) and nonlinear relationships (NLM) were also used to predict the compressive strength, modulus of elasticity, and toughness of the soilcrete as a function of w/c, curing time, and polymer contents.

Automated summary

The study tested and quantified the effects of two types of polymer modification on soilcrete properties, finding significant improvements in compressive strength and modulus of elasticity. Polymer modification optimized the flowability and stress-strain relationships of the soilcrete.