[1]黎君君 黎 福.高性能粉煤灰混凝土抗冻性试验分析[J].大众科技,2023,25(11):49-52.
 Experimental Analysis of Frost Resistance on High Performance Fly Ash Concrete[J].Popular Science & Technology,2023,25(11):49-52.
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高性能粉煤灰混凝土抗冻性试验分析()
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《大众科技》[ISSN:1008-1151/CN:45-1235/N]

卷:
25
期数:
2023年11
页码:
49-52
栏目:
建设与工程
出版日期:
2023-11-20

文章信息/Info

Title:
Experimental Analysis of Frost Resistance on High Performance Fly Ash Concrete
作者:
黎君君 黎 福
(广西路建工程集团有限公司,广西 南宁 530000)
关键词:
桥梁工程水泥混凝土抗冻性能粉煤灰
Keywords:
bridge engineering cement concrete frost resistance fly ash
文献标志码:
A
摘要:
为研究粉煤灰对高性能混凝土抗冻性能的影响,利用冻融循环试验分析粉煤灰掺量、冻融循环次数、含气量及结构气泡特征与抗冻性之间的关系。结果表明:质量损失率随着粉煤灰掺量增加与冻融循环次数增加均呈显著增加趋势,相对动弹性模量呈逐渐下降趋势,二者均对抗冻性能产生劣化效果;随着内部结构含气量增加,质量损失率呈逐渐下降趋势,且随冻融循环次数的增加,不同含气量之间的质量损失率指标差异愈加显著;随着粉煤灰掺量增加,混凝土结构中的气泡数量显著下降,耐久性系数也呈下降趋势;粉煤灰对混凝土抗冻性能的宏观影响与气泡特征微观结构变化基本相一致。
Abstract:
In order to study the effect of fly ash on the frost resistance of high-strength concrete, freeze-thaw cycle test was used to analyze the relationship between fly ash content, freeze-thaw cycle times, air content, structural bubble characteristics, and frost resistance. The results show that the quality loss rate shows a significant increasing trend with the addition of fly ash and the increase of freeze-thaw cycles, while the relative dynamic elastic modulus gradually decreases. Both of them have a deterioration effect on the frost resistance performance; as the internal structure gas content increases, the mass loss rate gradually decreases, and as the number of freeze-thaw cycles increases, the difference in mass loss rate indicators between different gas contents becomes more significant; with the increase of fly ash content, the number of bubbles in the concrete structure significantly decreases, and the durability coefficient also shows a downward trend; the macroscopic effect of fly ash on the frost resistance of concrete is basically consistent with the microstructure changes of bubble characteristics.

参考文献/References:

[1] 吴倩云,马芹永,王莹. 冻融循环作用下玄武岩纤维—矿渣粉—粉煤灰混凝土压拉强度试验与细观结构[J]. 复合材料学报,2021,38(3): 953-965.[2] 孙婧,王宏,兰建伟,等. 原状粉煤灰对超高性能混凝土性能的影响[J]. 硅酸盐通报,2022,41(1): 209-217.[3] 张志刚,赵林,张沛,等. 亚高温下不同粉煤灰掺量高延性混凝土的力学性能[J]. 东南大学学报(自然科学版),2020,50(5): 831-836.[4] 党莹. 纳米颗粒粉煤灰绿色混凝土的耐久性试验研究[J]. 无机盐工业,2021,53(7): 96-100.[5] 濮琦,薛万银,蒋林华,等. 冻融循环作用下混凝土断裂损伤特性研究[J]. 混凝土与水泥制品,2020(7): 30-33.

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备注/Memo

备注/Memo:
【收稿日期】2023-03-16【基金项目】河南省交通厅项目(2018J3)。【作者简介】黎君君(1984-),男,广西贵港人,广西路建工程集团有限公司工程师,研究方向为道路工程项目管理。
更新日期/Last Update: 2024-02-05