The influence of cement type on the compressive strength of artificially cemented sand
DOI:
https://doi.org/10.14195/2184-8394_125_4Keywords:
Compressive strength, Soil-cement, Portland cementAbstract
The technique of ground improvement of low bearing capacity soils using Portland cement has been used in many countries. The knowledge of the factors that influence the ground improved performance is of basic importance regarding the application of the technique. Research developed by Consoli et al. (2007, 2009, 2010) brought a rational methodology of dosage for ground-cement based on porosity/cement ratio. It is of common knowledge that the cement type influences directly the final resistance of concrete. However, little is known about this effect in ground cement mixtures. In this context, the study aims to evaluate the influence of the type of cement in the mechanical behavior of an artificially cemented soil. The experimental program was based on unconfined compression tests considering three types of Portland cement (CPV, CPII-E, CPIV), four cement percentages (3%, 5%, 7%, 9%) and three void ratios (0.65; 0.73; 0.81) of the ground-cement mixtures. The curing time was 28 days for all the types of cement. The results have shown that the type of cementitious agent significantly influences the resistance of improved ground at 28 days of curing, the highest resistance having been reached for the early strength Portland cement (CP V), followed by ordinary Portland cement with small insertion of slag (CP II-E) and pozzolanic Portland cement (CP IV).
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References
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