102 research outputs found
Effect of some biotic factors on microbially-induced calcite precipitation in cement mortar
Sporosarcina pasteurii, a common soil bacterium has been tested for microbial treatment of cement mortar. The present study also seeks to investigate the effects of growth medium, bacterial concentration and different buffers concerning the preparation of bacterial suspensions on the compressive strength of cement mortar. Two growth media, six different suspensions and two bacterial concentrations were used in the study. The influence of growth medium on calcification efficiency of S. pasteurii was insignificant. Significant improvement in the compressive as well as the tensile strength of cement mortar was observed. Microbial mineral precipitation visualized by Scanning Electron Microscopy (SEM) shows fibrous material that increased the strength of cement mortar. Formation of thin strands of fillers observed through SEM micrographs improves the pore structure, impermeability and thus the compressive as well as the tensile strengths of the cement mortar. The type of substrate and its molarity have a significant influence on the strength of cement mortar
Experimental investigation of zeolite and limestone powder on self-compacting concrete strength after early loading
Effects of waste glass and rubber on the SCC: rheological, mechanical, and durability properties
Characterization of scoria rock from Arabian lava fields as natural pozzolan for use in concrete
Performance of spent garnet as a sand replacement in high-strength concrete exposed to high temperature
Effect of calcium carbonate treated crumb rubber and oil palm fruit fibre on the mechanical properties of mortar
Experimental method for investigating the impact of the addition of polymer fibers on drying shrinkage and cracking of concretes
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