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二维纤维增强材料对聚合物水泥砂浆拉伸性能的影响
Influence of Two-dimensional Fiber Reinforced Materials on Tensile Properties of Polymer Cement Mortar
2022年第5期
二维纤维增强材料;聚合物水泥砂浆;拉伸性能;应力-应变曲线;破坏形态;耐久性
Two-dimensional fiber reinforced material; Polymer cement mortar; Tensile property; Stress-strain curve; Failure mode; Durability
2022年第5期
10.19761/j.1000-4637.2022.05.055.06
上海市科委课题项目(19DZ1202700)。
郭润开1,龙天艳2,王 娟2,徐建设1
1.上海理工大学 环境与建筑学院,上海 200093;2.上海市建筑科学研究院有限公司,上海 200003

郭润开1,龙天艳2,王 娟2,徐建设1

郭润开,龙天艳,王娟,等.二维纤维增强材料对聚合物水泥砂浆拉伸性能的影响[J].混凝土与水泥制品,2022(5):55-60.

GUO R K,LONG T Y,WANG J,et al.Influence of Two-dimensional Fiber Reinforced Materials on Tensile Properties of Polymer Cement Mortar[J].China Concrete and Cement Products,2022(5):55-60.

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摘   要:为了改善水泥基材料的抗裂性能,满足建筑在加固、修复过程中对修补材料高韧性的需求,将耐碱玻璃纤维网、玻璃纤维方格布、玻璃纤维毡3种二维纤维分别掺入到聚合物水泥砂浆中,研究了不同二维纤维增强材料对聚合物水泥砂浆拉伸性能的影响,通过应力-应变曲线和拉伸破坏形态揭示了二维纤维增强材料对聚合物水泥砂浆的作用机理,通过对掺二维纤维增强材料聚合物水泥砂浆进行浸水和碱溶液处理,评价了其耐水、耐碱性能。结果表明:3种二维纤维增强材料均能提高聚合物水泥砂浆的拉伸强度与断裂伸长率,其中,玻璃纤维方格布对提升聚合物水泥砂浆的拉伸强度最有利;浸水和碱溶液处理均会影响掺二维纤维增强材料聚合物水泥砂浆的拉伸性能,其中,碱溶液处理更不利。 Abstract: In order to improve the crack resistance of cement-based materials and meet the requirements for high toughness of repair materials in the process of building reinforcement and repair, three two-dimensional fibers of alkali resistant glass fiber mesh, glass fiber checkered cloth, glass fiber felt were added into polymer cement mortar. The effect of different two-dimensional fiber reinforced materials on the tensile properties of polymer cement mortar was studied. The action mechanism of two-dimensional fiber reinforced materials on polymer cement mortar was revealed by stress-strain curve and tensile failure mode. The water resistance and alkali resistance of polymer cement mortar mixed with two-dimensional fiber reinforced materials were evaluated by soaking in water and alkali solution. The results show that the three kinds of two-dimensional fiber reinforced materials can increase the tensile strength and elongation at break of the polymer cement mortar, among which the glass fiber checkered cloth is most beneficial to the improvement of the tensile strength of polymer cement mortar. Both water immersion and alkali solution treatment will affect the tensile properties of polymer cement mortar mixed with two-dimensional fiber reinforced materials, among which alkali solution treatment is more unfavorable.
英文名 : Influence of Two-dimensional Fiber Reinforced Materials on Tensile Properties of Polymer Cement Mortar
刊期 : 2022年第5期
关键词 : 二维纤维增强材料;聚合物水泥砂浆;拉伸性能;应力-应变曲线;破坏形态;耐久性
Key words : Two-dimensional fiber reinforced material; Polymer cement mortar; Tensile property; Stress-strain curve; Failure mode; Durability
刊期 : 2022年第5期
DOI : 10.19761/j.1000-4637.2022.05.055.06
文章编号 :
基金项目 : 上海市科委课题项目(19DZ1202700)。
作者 : 郭润开1,龙天艳2,王 娟2,徐建设1
单位 : 1.上海理工大学 环境与建筑学院,上海 200093;2.上海市建筑科学研究院有限公司,上海 200003

郭润开1,龙天艳2,王 娟2,徐建设1

郭润开,龙天艳,王娟,等.二维纤维增强材料对聚合物水泥砂浆拉伸性能的影响[J].混凝土与水泥制品,2022(5):55-60.

GUO R K,LONG T Y,WANG J,et al.Influence of Two-dimensional Fiber Reinforced Materials on Tensile Properties of Polymer Cement Mortar[J].China Concrete and Cement Products,2022(5):55-60.

摘要
参数
结论
参考文献
引用本文

摘   要:为了改善水泥基材料的抗裂性能,满足建筑在加固、修复过程中对修补材料高韧性的需求,将耐碱玻璃纤维网、玻璃纤维方格布、玻璃纤维毡3种二维纤维分别掺入到聚合物水泥砂浆中,研究了不同二维纤维增强材料对聚合物水泥砂浆拉伸性能的影响,通过应力-应变曲线和拉伸破坏形态揭示了二维纤维增强材料对聚合物水泥砂浆的作用机理,通过对掺二维纤维增强材料聚合物水泥砂浆进行浸水和碱溶液处理,评价了其耐水、耐碱性能。结果表明:3种二维纤维增强材料均能提高聚合物水泥砂浆的拉伸强度与断裂伸长率,其中,玻璃纤维方格布对提升聚合物水泥砂浆的拉伸强度最有利;浸水和碱溶液处理均会影响掺二维纤维增强材料聚合物水泥砂浆的拉伸性能,其中,碱溶液处理更不利。

Abstract: In order to improve the crack resistance of cement-based materials and meet the requirements for high toughness of repair materials in the process of building reinforcement and repair, three two-dimensional fibers of alkali resistant glass fiber mesh, glass fiber checkered cloth, glass fiber felt were added into polymer cement mortar. The effect of different two-dimensional fiber reinforced materials on the tensile properties of polymer cement mortar was studied. The action mechanism of two-dimensional fiber reinforced materials on polymer cement mortar was revealed by stress-strain curve and tensile failure mode. The water resistance and alkali resistance of polymer cement mortar mixed with two-dimensional fiber reinforced materials were evaluated by soaking in water and alkali solution. The results show that the three kinds of two-dimensional fiber reinforced materials can increase the tensile strength and elongation at break of the polymer cement mortar, among which the glass fiber checkered cloth is most beneficial to the improvement of the tensile strength of polymer cement mortar. Both water immersion and alkali solution treatment will affect the tensile properties of polymer cement mortar mixed with two-dimensional fiber reinforced materials, among which alkali solution treatment is more unfavorable.

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(1)在聚合物水泥砂浆中分别掺入耐碱玻纤网、玻璃纤维方格布、玻璃纤维毡后,其拉伸强度和断裂伸长率均有所提高。其中,掺耐碱玻纤网聚合物水泥砂浆拥有较好的断裂伸长率,掺玻璃纤维方格布聚合物水泥砂浆拥有较好的拉伸强度,可根据实际情况选用;不推荐使用玻璃纤维毡来增强聚合物水泥砂浆的拉伸性能。
(2)掺耐碱玻纤网、玻璃纤维毡聚合物水泥砂浆的应力-应变曲线均经历弹性阶段、屈服阶段、强化阶段和破坏阶段,而掺玻璃纤维方格布聚合物水泥砂浆无明显的屈服阶段。掺耐碱玻纤网聚合物水泥砂浆破坏时裂缝分布细密,表现出较好的裂缝控制能力;掺玻璃纤维方格布聚合物水泥砂浆破坏时裂缝分布较为集中,在试件初裂后,应力不能在基体内部均匀分布。
(3)浸水和碱溶液处理均会降低掺不同二维纤维增强材料聚合物水泥砂浆的拉伸强度和断裂伸长率,且碱溶液处理的影响更大。
(4)浸水处理后,试件中的AFt和C-S-H凝胶部分转化为CaCO3,导致基体内部产生缺陷,宏观表现为试件的拉伸强度和断裂伸长率降低;碱溶液处理后,试件中的AFt会分解生成Ca(OH)2和CaSO4,从而导致试件的拉伸强度和断裂伸长率降低。

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郭润开,龙天艳,王娟,.二维纤维增强材料对聚合物水泥砂浆拉伸性能的影响[J].混凝土与水泥制品,2022(5):55-60.

GUO R K,LONG T Y,WANG J,et al.Influence of Two-dimensional Fiber Reinforced Materials on Tensile Properties of Polymer Cement Mortar[J].China Concrete and Cement Products,2022(5):55-60.

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