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A review on strength development of high performance concrete
Construction and Building Materials ( IF 7.4 ) Pub Date : 2021-09-23 , DOI: 10.1016/j.conbuildmat.2021.124865
Aloys Dushimimana 1 , Aude Amandine Niyonsenga 2 , Frederic Nzamurambaho 3
Affiliation  

Strength is one of the most important properties of high performance concrete (HPC). Effects of supplementary cementitious materials (SCMs), aggregate, fiber, curing method, superabsorbent polymer (SAP), expansion-promoting additive (EPA), shrinkage reducing additives (SRA) and water-to-binder (w/b) ratio on the strength of HPC are reviewed. In general, incorporation of SCMs increases the strength, however, fly ash tends to reduce the early age strength but this can be mitigated by blending it with nanosilica or other admixtures. Small size and strong aggregate enhances the strength while weak aggregate limits the strength development. Fibers generally increase flexural and splitting tensile strengths but have little or no effect on the compressive strength. Elevated temperature curing is effective for high early age strength gain and its adverse effects on the later age strength can be limited using some SCMs. Decreasing w/b ratio leads to increased strength but with increased autogenous shrinkage (AS). Incorporation of SAP and SRA generally reduce the AS but also decrease the strength, however; the optimal control of extra added water from SAP and a hybridization of SAP with SRA may increase the strength but need to be further studied.



中文翻译:

高性能混凝土强度发展综述

强度是高性能混凝土 (HPC) 最重要的特性之一。辅助胶凝材料 (SCM)、骨料、纤维、固化方法、高吸水性聚合物 (SAP)、膨胀促进剂 (EPA)、减缩添加剂 (SRA) 和水与粘合剂 (w/b) 之比的影响HPC 的实力进行了审查。一般来说,加入 SCM 会增加强度,然而,飞灰往往会降低早期强度,但这可以通过将其与纳米二氧化硅或其他外加剂混合来减轻。小而强的骨料提高了强度,而弱的骨料限制了强度的发展。纤维通常会增加弯曲和劈裂拉伸强度,但对压缩强度几乎没有影响或没有影响。高温固化可有效提高早期强度,并且使用一些 SCM 可以限制其对后期强度的不利影响。降低 w/b 比导致强度增加,但自收缩 (AS) 增加。然而,SAP 和 SRA 的结合通常会降低 AS,但也会降低强度;对来自 SAP 的额外添加水的最佳控制以及 SAP 与 SRA 的杂交可能会增加强度,但需要进一步研究。

更新日期:2021-09-23
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