Investigation of mechanical and durability properties of sustainable high-strength concrete

Mamoona Riaz, Z. Alam, T. Zafar, U. Javed, Hanzlah Akhlaq
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引用次数: 1

Abstract

The surge in production of cement due to rapid growth of construction industry has an adverse effect on environment globally caused by the huge amount of carbon emission. In order to produce an environment friendly concrete, this study investigates the effective contribution of silica fume (SF) on various mechanical and durability characteristics of high strength concrete. In this regard, the incorporation of silica fume was adopted with a progressive proportion of 0%, 5%, 10%, 15%, 20%, 25% and 30% by weight of cement constituting various concrete mixes namely CM, SF05, SF10, SF15, SF20, SF25 and SF30 respectively. The mechanical and durability properties of concrete improved along with the incorporation of SF up to its 15% replacement. However, excessive replacement of SF have adverse effect on its mechanical and durability properties due to dilution effect of cement. Similarly, in terms of the mechanical characteristics, the proposed 15% substitution of silica fume resulted in highest compressive and flexural strengths with respect to CM. The maximum reduction in strength loss with respect to control mix was 41.17% and 28.04% for sulfuric and hydrochloric acid due to formation of densified microstructure.
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可持续高强混凝土力学与耐久性研究
由于建筑业的快速增长,水泥产量激增,造成了大量的碳排放,对全球环境造成了不利影响。为了生产环境友好型混凝土,本研究探讨了硅灰(SF)对高强混凝土的各种力学和耐久性特性的有效贡献。为此,在CM、SF05、SF10、SF15、SF20、SF25、SF30等各种混凝土配合比中,采用硅灰的掺入比例依次为0%、5%、10%、15%、20%、25%、30%。随着SF的加入,混凝土的机械性能和耐久性得到了改善,其替代率高达15%。然而,由于水泥的稀释效应,过量更换顺丰会对其力学性能和耐久性产生不利影响。同样,在机械特性方面,建议的15%硅粉替代导致相对于CM的最高抗压和抗弯强度。与对照混合物相比,硫酸和盐酸的强度损失最大降幅分别为41.17%和28.04%,这是由于形成了致密的微观组织。
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CiteScore
1.70
自引率
0.00%
发文量
28
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