Influence of soil-cement composition on its deformability

Abstract

The paper discusses the results of deformability tests of soil-cement composites made with cohesive and non-cohesive soils. The compositions of the materials analysed were diversified in terms of their cement paste volume fractions and water-cement ratios. The aim of the research was to determine the secant modulus of elasticity in uniaxial compression of soil-cement composites in accordance with the EN 12390-13 standard dedicated to concrete testing. Due to the lower level of strength of the materials in question in comparison with ordinary concrete, nominal stress was lowered and the loading and unloading rates were modified. The number of loading cycles required for the determination of stabilised deformations was verified. The test results obtained and their analysis indicate the significant impact of the type of soil on the deformability of soil-cement composites. It was also found that the deformability of the materials tested is sensitive to changes in their compositions.