不同腐蚀环境下BF对砂浆性能的影响及机理研究-《混凝土与水泥制品》杂志社

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不同腐蚀环境下BF对砂浆性能的影响及机理研究

Study on influence and mechanism of BF on mortar performance under different corrosive environments

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关键词：

玄武岩纤维；砂浆；力学性能；干燥收缩性能；耐腐蚀性能；微观结构

Key words：

Basalt fiber; Mortar; Mechanical property; Drying shrinkage; Corrosion resistance; Microstructure

刊期：

2025年第11期

DOI：

10.19761/j.1000-4637.2025.11.047.05

文章编号：

基金项目：

四川省教育厅自然科学项目（18ZB0310）；绵阳职教研究中科研项目（MZYH2021-04）。

作者：

贾陆军1，2，3，胥有利3，赵平3，蒋勇1，2，3，霍冀川1，2，*

单位：

1.环境友好能源材料国家重点实验室，四川绵阳 621000；2.西南科技大学材料与化学学院，四川绵阳 621000；3.绵阳职业技术学院材料与建造学院，四川绵阳621000

摘要

摘要：研究了玄武岩纤维（BF）的掺量（0.1%、0.2%、0.3%）和长度（6 mm、9 mm）对砂浆力学性能、干燥收缩性能和耐不同溶液（Ca(OH)₂溶液、KCl溶液、Na₂SO₄溶液）腐蚀性能的影响，并与清水养护（水养）组进行了对比，同时分析了BF对砂浆性能的微观作用机理。结果表明：当BF长度为9 mm、掺量为0.2%时，砂浆的抗压和抗折强度最大；随着养护龄期的增加，试件的抗折强度、抗压强度和干缩率均增大；试件经不同溶液浸泡后的抗折和抗压强度大小顺序为清水>Ca(OH)₂溶液>KCl溶液>Na₂SO₄溶液，干缩率大小顺序为清水＜Ca(OH)₂溶液＜KCl溶液＜Na₂SO₄溶液；BF的耐腐蚀性较好，其通过桥接作用改善了砂浆内部的界面过渡区，增强了砂浆的抗裂性能和耐久性能。

Abstract: The effects of the content (0.1%, 0.2%, 0.3%) and length (6 mm, 9 mm) of basalt fiber (BF) on the mechanical properties, drying shrinkage, and corrosion resistance of mortar in different solutions (Ca(OH)₂ solution, KCl solution, Na₂SO₄ solution) were studied, and compared with the water curing group. At the same time, the micro mechanism of BF on mortar properties was analyzed. The results show that when the length of BF is 9 mm and the content of BF is 0.2%, the compressive strength and flexural strength of the mortar are the highest. With the increase of the curing age, the flexural strength, compressive strength, and drying shrinkage rate of the specimens in different solutions all increase. The order of flexural and compressive strength of specimens soaked in different solutions is as follows: water > Ca(OH)₂ solution > KCl solution > Na₂SO₄ solution, and the order of drying shrinkage rate is water < Ca(OH)₂ solution < KCl solution < Na₂SO₄ solution. BF has good corrosion resistance, which improves the interface transition zone inside the mortar through bridging effect, enhancing the crack resistance and durability of the mortar.

结论

（1）当BF长度一定时，随着BF掺量的增加，试件水养3、7、28 d的抗折和抗压强度基本呈先增大后减小的趋势，最佳掺量为0.2%；与BF长度为6 mm的试件相比，BF长度为9 mm试件水养3、7、28 d的抗折和抗压强度基本较大。

（2）随着养护龄期的增加，试件在不同溶液中的抗折强度、抗压强度和干缩率均增大。当养护龄期相同时，试件经清水及3种腐蚀溶液浸泡后的抗折和抗压强度大小顺序为：清水>Ca(OH)₂溶液>KCl溶液>Na₂SO₄溶液，干缩率大小顺序为：清水＜Ca(OH)₂溶液＜KCl溶液＜Na₂SO₄溶液。
（3）BF的耐腐蚀性较好，且BF具有桥接砂浆内部裂缝和分担部分砂浆内应力的作用，掺入适量合适长度的BF能有效提升砂浆的力学性能，改善砂浆的干燥收缩性能。

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引用本文

贾陆军,胥有利,赵平,等.不同腐蚀环境下BF对砂浆性能的影响及机理研究[J].混凝土与水泥制品,2025(11):47-51.

JIA L J,XU Y L,ZHAO P,et al.Study on influence and mechanism of BF on mortar performance under different corrosive environments[J].China Concrete and Cement Products,2025(11):47-51.

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