EXPERIMENTAL STUDY OF EFFECT OF ARTIFICIAL SAND AND AGGREGATES ON COMPRESSIVE STRENGTH AND WORKABILITY OF CONCRETE

Any Civil Engineering Structure must rest on a Structures are founded with concrete and steel materials mainly. Traditionally, concrete is mixture of cement, sand and aggregate. The most commonly used fine aggregate is natural river sand and coarse aggrega te is stone quarry. Scarcity of good quality Natural River sand due to depletion of resources and restriction due to environmental consideration has made concrete manufactures to look for suitable alternative. One such alternative is “Artificial sand” name ly if graded by means may also be called as manufactured sand. In this dissertation, attempt has been made to determine and verify experimentally the effect of artificially graded sand and demolished concrete structural aggregates on compressive strength and workability of concrete. Artificial sand is manufactured from crushing of local chury, stone chips and demolished concrete fines while the artificial aggregates are prepared from demolished structures. In the first phase of the study, the specimen of standard cube of (150 mm x 150 mm x 150 mm) was used to determine the compressive strength of concrete with natural sand and stone aggregates. The specimens were tested for each nominal mix and definite water cement ratio. Three cubes were prepared for obt aining average of 7, 14 and 28 days strength of concrete. In the second phase of the study, another specimen of standard cube same size was used to determine the compressive strength of concrete with artificial sand with full replacement and demolished con crete structure aggregates. The specimens were tested again for obtaining average of 7, 14 and 28 days strength. Results were obtained to compare the nominal mix strength of traditional concrete with artificial concrete analytically as well as graphicall y. The conclusions were made for the understanding the effect of artificial concrete in terms of strength and workability over traditional concrete.