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塑化和引气对水泥基材料孔隙率及耐久性的影响

Both Plasticizing and Air-Entraining Effect on Cement-Based Material Porosity and Durability.

作者信息

Tolegenova Aigerim, Skripkiunas Gintautas, Rishko Lyudmyla, Akmalaiuly Kenzhebek

机构信息

Department of Construction and Building Materials, Satbayev University, Satpaev str.22a, Almaty 050013, Kazakhstan.

Department of Building Materials and Fire Safety, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Sauletekio al.11, LT-10223 Vilnius, Lithuania.

出版信息

Materials (Basel). 2022 Jun 21;15(13):4382. doi: 10.3390/ma15134382.

DOI:10.3390/ma15134382
PMID:35806505
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9267631/
Abstract

The influence of a complex application of both plasticizing and air-entraining effects on concrete with polycarboxylate ether superplasticizer (PCE), air-entraining admixture (AIR), or an anti-foaming agent (AF) is analyzed in this paper with considerations for on the air content, workability, flexural and compressive strength, and freezing-thawing resistance of hardened cement mixtures. The effect of the complex behavior of PCE, AIR, and AF on the porosity of hardened cement mortar (HCM) and freezing-thawing resistance was investigated; freezing-thawing resistance prediction methodology for plasticized mortar was also evaluated. The results presented in the article demonstrate the beneficial influence of entrained air content on consistency and stability of cement mortar, closed porosity, and durability of concrete. Freezing-thawing factor K depending on porosity parameters can be used for freezing-thawing resistance prediction. With both plasticizing (decrease in the water-cement ratio) and air-entraining effects (increase in the amount of entrained air content), the frost resistance of concrete increases, scaling decreases exponentially, and it is possible to obtain great frost resistance for cement-based material.

摘要

本文分析了聚羧酸醚高效减水剂（PCE）、引气剂（AIR）或消泡剂（AF）对混凝土增塑和引气综合作用的影响，同时考虑了硬化水泥混合物的含气量、工作性、抗折和抗压强度以及抗冻融性。研究了PCE、AIR和AF的复杂行为对硬化水泥砂浆（HCM）孔隙率和抗冻融性的影响；还评估了增塑砂浆抗冻融性的预测方法。文章给出的结果表明，引入的空气含量对水泥砂浆的稠度和稳定性、封闭孔隙率以及混凝土的耐久性具有有益影响。取决于孔隙率参数的冻融因子K可用于抗冻融性预测。通过增塑（降低水灰比）和引气作用（增加引入的空气含量），混凝土的抗冻性提高，剥落呈指数下降，并且有可能获得具有高抗冻性的水泥基材料。

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本文引用的文献

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Influence of Sand-Cement Ratio and Polycarboxylate Superplasticizer on the Basic Properties of Mortar Based on Water Film Thickness.基于水膜厚度的砂灰比和聚羧酸高效减水剂对砂浆基本性能的影响
Materials (Basel). 2021 Aug 26;14(17):4850. doi: 10.3390/ma14174850.
3
Additional Porosity as a Side Effect of Polycarboxylate Addition and Its Influence on Concrete's Scaling Resistance.
冻融循环作用下纺织增强水泥基复合材料的无损监测
Materials (Basel). 2024 Dec 20;17(24):6232. doi: 10.3390/ma17246232.
作为添加聚羧酸盐的副作用的额外孔隙率及其对混凝土抗剥落性的影响。
Materials (Basel). 2020 Jan 9;13(2):316. doi: 10.3390/ma13020316.
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Pore Structure as a Response to the Freeze/Thaw Resistance of Mortars.孔隙结构对砂浆抗冻融性的响应
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The Influence of Water/Cement Ratio and Air Entrainment on the Electric Resistivity of Ionically Conductive Mortar.水灰比和引气对离子导电砂浆电阻率的影响
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