Mineral Additives in Concrete Durability: A Comprehensive Review

Khem Raj Regmi, K. Sahani, S. K. Sahani
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Abstract

The body of literature on concrete using mineral admixtures covers a number of review studies on the durability characteristics of various materials used in concrete, such as fly ash (FA), rice husk ash (RHA), ground granular blast furnace slag (GGBS), fly ash (SF), and met kaolin (MK) are reviewed in this work. The features that are related to durability have been evaluated, and they include permeability, resistance to chloride ion penetrations, abrasion, fire resistance efflorescence. Incorporating mineral admixtures in concrete affects various properties. Concrete's permeability decreases and its ability to resist chloride ion penetration rises when admixtures containing a greater alumina content are used.  Use of mineral admixtures enhances compressive strength and enhancing abrasion resistance. Moreover, highly reactive mineral admixtures mitigate efflorescence. Notably, while heating PFA concrete improves fire resistance, it reduces overall durability. SF concrete, on the other hand, behaves similarly to standard concrete but can be more brittle. MK concrete exhibits increased strength at 200°C, but its durability and strength decline at higher temperatures compared to other concrete types.RHA pozzolans can replace OPC up to 15% by weight after curing for up to 200 days without lowering the concrete's compressive strength.
混凝土耐久性中的矿物添加剂:全面回顾
关于使用矿物掺合料的混凝土的大量文献涵盖了对混凝土中使用的各种材料耐久性特征的大量综述研究,如粉煤灰(FA)、稻壳灰(RHA)、磨细粒状高炉矿渣(GGBS)、粉煤灰(SF)和偏高岭土(MK)。对与耐久性有关的特性进行了评估,包括渗透性、抗氯离子渗透性、耐磨性、耐火蚀性。在混凝土中掺入矿物掺合料会影响各种性能。使用氧化铝含量较高的外加剂时,混凝土的渗透性会降低,抗氯离子渗透的能力会提高。 使用矿物掺合料可提高抗压强度和耐磨性。此外,高活性矿物掺合料还能减少风化。值得注意的是,虽然加热 PFA 混凝土可以提高耐火性,但会降低整体耐久性。另一方面,SF 混凝土的性能与标准混凝土类似,但可能更脆。MK 混凝土在 200°C 时强度有所提高,但与其他类型的混凝土相比,其耐久性和强度在更高温度下会下降。RHA 灰浆在养护长达 200 天后,可取代重量百分比高达 15%的 OPC,而不会降低混凝土的抗压强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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