Influence of Internal Curing with Lightweight Pumice Fine Aggregate on the Mechanical Properties of Cement Mortars

IF 3.1 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Construction Innovation-England Pub Date : 2022-12-07 DOI:10.15282/construction.v2i2.8744
Dr. Ferhad Rahim Karim
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Abstract

The cement mortar in the building encounters a problem of curing due to covering mortar under finishing materials such as tiles, stones, and marble. Internal curing is one of the methods for solving this problem. This investigation highlights the impact of internal curing with lightweight pumice fine aggregate on cement mortar's mechanical properties, such as compressive and tensile strengths, and performance, such as density. Thus, the internal cured water-to-cement ratio was studied, which varied from 0 to 21.5%, and the partial replacement of natural sand with lightweight pumice fine aggregate varied from 0% to 16.63%. The results showed the mechanical properties improved with the increased internal water-to-cement ratio. Increasing the internal cured water-to-cement ratio up to 21.52% improves the compressive, split tensile, and flexural strengths of cement mortar up to 77.3%, 56.42%, and 28.71%, respectively. In addition, the partial replacement of natural sand with lightweight pumice aggregate up to 10.9% enhances the compressive, split tensile, and flexural strengths of cement mortar up to 24.2%, 6.1%, and 28.7%, respectively, due to a reduction in drying and autogenous shrinkage.
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轻质浮石细骨料内养护对水泥砂浆力学性能的影响
建筑中的水泥砂浆由于在瓷砖、石材、大理石等饰面材料下覆盖砂浆而出现固化问题。内固化是解决这一问题的方法之一。本研究强调了轻质浮石细骨料内部养护对水泥砂浆力学性能(如抗压和抗拉强度)和性能(如密度)的影响。因此,研究了内固化水灰比范围为0 ~ 21.5%,轻质浮石细骨料部分替代天然砂范围为0% ~ 16.63%。结果表明,随着内部水灰比的增大,材料的力学性能得到改善。将内固化水灰比提高至21.52%,水泥砂浆的抗压强度、劈裂抗拉强度和抗弯强度分别提高77.3%、56.42%和28.71%。此外,轻质浮石骨料部分替代天然砂达到10.9%,水泥砂浆的抗压、劈裂拉伸和抗弯强度分别提高了24.2%、6.1%和28.7%,这是由于干燥和自收缩的减少。
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来源期刊
Construction Innovation-England
Construction Innovation-England CONSTRUCTION & BUILDING TECHNOLOGY-
CiteScore
7.10
自引率
12.10%
发文量
71
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