废弃砂浆粉对混凝土抗冻性能的影响

发布时间：2018-02-09 03:27

本文关键词： 废弃砂浆粉抗冻性能水灰比抗压强度质量损失　出处：《混凝土》2017年08期 　论文类型：期刊论文

【摘要】：研究了废弃砂浆粉对混凝土抗冻性的影响,测试了不同水灰比及废弃砂浆粉掺量下冻融循环后混凝土的抗压强度、质量损失。结果表明,随着冻融次数增加,混凝土的质量损失率及抗压强度损失率增大,当水灰比低于0.44时,经25次冻融后,混凝土抗压强度略有升高;随着废弃砂浆掺量增加,混凝土的抗冻性能总体呈下降趋势,试验范围内,当水灰比低于0.44时,废弃砂浆粉掺量低于10%,可以提高混凝土抗冻性能。随着水灰比增加,相同条件下,混凝土的质量损失率及抗压强度损失率均呈增大趋势。
[Abstract]:The influence of waste mortar powder on the frost resistance of concrete is studied. The compressive strength and mass loss of concrete under freeze-thaw cycle under different water / cement ratio and waste mortar powder content are tested. The results show that with the increase of freezing and thawing times, the compressive strength and mass loss of concrete under freeze-thaw cycle are measured. The mass loss rate and compressive strength loss rate of concrete increase. When the water-cement ratio is lower than 0.44, the compressive strength of concrete increases slightly after 25 times freeze-thaw. In the range of test, when the ratio of water to cement is lower than 0.44, the content of waste mortar powder is less than 10, and the frost resistance of concrete can be improved. With the increase of water-cement ratio, the loss rate of mass and compressive strength of concrete increases with the increase of water-cement ratio.
【作者单位】：沈阳建筑大学材料科学与工程学院;
【基金】：“十二五”国家科技支撑计划课题(2013BAJ15B03) 国家建筑材料行业科技创新计划(2013-M3-8) 住房和城乡建设部项目(2015-K4-002)
【分类号】：TU528

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