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Properties of high early strength cement-based calcium acetate prepared from etching waste liquid and limestone mud

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Document pages: 9 pages

Abstract: Concrete is one of the most widely used building materials. There are several methods to improve its performance, one of which is the use of high early strength admixture (Hesa). Typical Hesa include calcium nitrate, calcium chloride and calcium formate (CF). Industrial by-products, such as acetic acid and limestone sludge (LSS), can be used together to produce calcium acetate (CA), which can then be used as cement-based Hesa. In this study, the weight ratios of calcium carbonate, LSS and cement were 1   1, 1   1.5 and 1   2, and the properties of the prepared calcium were evaluated. Calcium and carbon fibers were mixed with cement in different weight ratios (0, 1, 2 and 3) to obtain CA - and CF mortar respectively. Flow characteristics, setting time, pH andcompressive strength of these mortars were evaluated, and their X-ray diffraction patterns were also analyzed. It was found that as the CF content in the CF-mortar increased, the initial strength of the mortar also increased. However, it impaired its long-term strength. On the other hand, when 1 CA was mixed with cement, satisfactory early and long-term strengths were achieved. Thus, CA, which is obtained from industrial by-products, can be an effective HESA.

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