4/2/2023 0 Comments Walter temboIn total, 0% to 30% partial sand replacement with copper tailings was used in both mixes with the 0% copper tailings replacement being the control mix and reference point. In total, 30 concrete cubes were cast based on the two water-cement ratios. Design/methodology/approach Laboratory experimental approach of concrete production based on water/cement ratios of 0.3 and 0.5 was used because this was an exploratory study designed to establish the primary performance of concrete. The study was motivated by the accumulation and non-use of copper tailings in dams among them tailing dam 25 also known as TD 25 in Kitwe city of the Copperbelt province in Zambia that take up approximately 111 hectares of unused land. more Purpose This study aimed to investigate the suitability and cost-benefit of using copper tailings as partial replacement of sand in concrete production. Purpose This study aimed to investigate the suitability and cost-benefit of using copper tailings. The study established that tilt-up was, in fact, more expensive than the conve. Cost analysis was done on a hypothetical building as no contractor was found using tilt-up construction in the construction sector. The data were analyzed using descriptive statistics. Sixty-six questionnaires were administered to design professionals operating in the Zambian building sector using simple random sampling and thirty-six were returned giving a response rate of 55%. The methodology used consisted of a literature review, a questionnaire survey and a scenario analysis consisting of a hypothetical 4900 square meter commercial building with a height of 8 meters. This study investigated the feasibility of using tilt-up construction in the construction of commercial building walls. The Zambian building sector normally experiences time and cost overruns. more Construction projects are much appreciated by both client and contractor when completed on schedule and within budget so as to avoid cost overruns. The average theoretic.Ĭonstruction projects are much appreciated by both client and contractor when completed on schedu. 20% and 40% replacement of natural aggregate resulted in the concrete fluidity reduction of 5% and 17%, respectively. 40% replacement of natural fine aggregate resulted in a drop of compressive strength by 11% yet retaining compressive strength at 25 MPa. Results indicated that replacement of 20% natural fine aggregate with recycled fine aggregate resulted in the increase of concrete compressive strength by 8% from 28 MPa to 30 MPa at 28 days. Concrete fluidity and compressive strength tests were carried out at 7 days and 28 days only because the study was exploratory in nature. Experiments were carried out to establish the performance of this 0.6 water-cement ratio concrete containing partially recycled fine aggregate. This research focused on how structural concrete waste could be crushed and used as recycled fine aggregate in the production of concrete. more Concrete waste is generally a challenge that is left to accumulate in illegal dumping areas and landfills. Concrete waste is generally a challenge that is left to accumulate in illegal dumping areas and l.
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