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DETAILED STUDY ON THE PROPERTIES OF PLASTIC CONCRETE CUTOFF WALL MATERIALS MIXED WITH WATERPROOFING ADMIXTURES

Abhishek Varshini, Umanath Umaiyan, Biswabikash Rout, V Govindaraj

Abstract


This study presents the results of a comprehensive experimental work performed to characterize the mechanical and hydraulic properties of plastic concrete materials added with water-resisting and crystalline admixture as Permeability Reducing Admixture for Hydrostatic conditions (PRAH).  The mechanical properties, deformation, permeability nature, triaxial stress-strain curve, hydration products, phase composition, and pore structure of plastic concrete with various proportions of PRAH were investigated. In addition to that, retarding admixture was used to delay the hydration process and the effect was studied. The results indicate that the strength of plastic concrete has increased linearly with the content of admixtures. Whereas the permeability has reduced significantly by increasing the PRAH content up to 0.8% of cement content. Beyond the limit, the reduction in permeability is not significant. The study on the ageing effect reveals that the reduction in the internal pore diameter ended up as a reduction in permeability, and improved structural integrity ended up in an improvement in the compressive strength are the outcomes of hydration reactions in the presence of water, producing new solid amorphous phases in the concrete bulk.

Keywords: Plastic Concrete, Permeability Reducing Admixture, Micro Analysis, Concrete Permeability


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References


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