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PARTIAL REPLACEMENT OF NATURAL SAND BY GRANULATED BLAST FURNACE SLAG (GBFS) IN FINE AGGREGATE FOR CONCRETE: PRACTICAL APPLICATION IN VIETNAM
Abstract
Natural sand resources in Vietnam have been nearly exhausted and its price has been increasingly escalating. According to estimation, by 2020 Vietnam will not be able to provide enough sand for construction industry. Alternative materials for natural sand are now encouraged by the authorities. Therefore, this article focuses on researching the possibility of using GBFS as an alternative for natural sand in aggregate for concrete. Based on the previous studies and suggestions given by domestic and international researches, the authors have replaced 40-60% of natural sand with GBFS in fine aggregate for concrete. The effectiveness of the new aggregate is evaluated on the basis of not only its own physical characteristics but also the compressive and flexural strength of the concrete using it. The obtained results point out that the artificial fine aggregate gives best result when the mixing rate is lower or keeps water/cement ratio constant and the slump is very low.
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References9
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Number of times cited according to Crossref: 2
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