Abstract
This study aims full replacement of natural sand with quartz sand which has low porosity & certain amount of cement replaced with supplementary cementitious material (ultrafine GGBS) obtained as the byproduct from the steel manufacturing industries. Mixes are designed for achieving compressive strength of M-150 by using locally available materials. Trials has performed & cubes are tested for their compressive strength at 3 days, 7 days, & another set at the age of 28 days. Out of all mixes one mix has been selected which has achieved the targeted strength. The maximum compressive strength is obtained when the medium quartz sand and coarse quartz sand are in the same ratio with zero percent natural sand. From the results it is observed that, natural sand can be fully replaced with quartz sand in high strength concrete & optimum percentage of cement can be replaced with ultrafine GGBS is up to 30%, optimum percentage of high range water reducing agent (HRWRA) is 0.9% of total weight of cementitious material, steel fibers are 6.2% of total weight of cementitious material. The maximum strength achieved is 156.5 MPa. Based on the results and discussions certain recommendations are framed in the design of Ultra High Strength Concrete M-150 with locally available material with great sustainability.
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