使用 GGBS 和 Alccofine 开发超高性能混凝土

Prerna Kumari
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摘要

摘要:超高性能混凝土(UHPC)是一种水泥基混合物,具有极高的抗压强度(超过 120 兆帕)、韧性、拉伸延展性和使用寿命长等特点。基质成分中通常使用磨细高炉矿渣(GGBS)和铝灰(AF)来增加颗粒系统的堆积密度,从而提高基质的强度,以保证 UHPC 具有适当的强度。为了研究含有 GGBS 和 AF 的三元混合 UHPC 的工程特性,我们进行了一项比较研究。与对照 UHPC 混合料相比,三元混合 UHPC 混合料的机械和耐久性能在特定范围内通过 AF 的百分比变化得到改善。在这项研究中,实验工作包括混合配比和三元混合 UHPC 试样的制备,以及在实验室中进行的各种测试,如抗压强度、劈裂拉伸强度、挠曲强度和 RCPT(快速氯化物渗透测试)。结果表明,在正常水固化条件下,基于 GGBS 的超高强度混凝土的强度质量相当可观,最高可达 40% 的水泥替代水平。此外,与二元材料相比,含 20% AF 和 40% GGBS 的混合物具有更好的机械性能和耐久性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development of Ultra-High-Performance Concrete Using GGBS and Alccofine
Abstract: Ultra-high-performance concrete, or UHPC, is a cementitious mixture that is distinguished by its exceptionally high compressive strength—more than 120 MPa as well as its remarkable toughness, tensile ductility, and longevity. Ground Granulated Blast Furnace Slag (GGBS) and Alccofine (AF) are commonly used in the matrix composition to increase the particle system's packing density and subsequently enhance the matrix's strength in order to guarantee that UHPC has the proper strength. To investigate the engineering properties of ternary blended UHPC with GGBS, AF, a comparative study was conducted. In comparison to the control UHPC mix, the ternary blended UHPC mix's mechanical and durability qualities were improved by the percentage variation of AF within specific bounds. In this study, the experimental work included mix proportioning and preparation of ternary blended UHPC specimens and various tests like Compressive Strength, Split Tensile Strength, Flexure Strength and RCPT (Rapid Chloride Penetration Test) were performed in the laboratory. The results show that under normal water curing conditions, the strength qualities of UHPC based on GGBS are considerable, up to a cement replacement level of 40%. In addition, compared to the binary counterpart, the mixture of 20 Percent AF and 40 Percent GGBS showed better mechanical and durability properties.
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