| 长龄期粉煤灰混凝土氯离子扩散系数的试验研究 |
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| 引用本文： | 张坚,周欣竹,郑建军,应卓轩,章陈超.长龄期粉煤灰混凝土氯离子扩散系数的试验研究[J].混凝土,2021(1):6-8. |
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| 作者姓名： | 张坚 周欣竹 郑建军 应卓轩 章陈超 |
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| 作者单位： | 浙江农林大学 暨阳学院,浙江 诸暨 311800;浙江工业大学 建筑工程学院,浙江 杭州 310014 |
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| 基金项目： | 国家自然科学基金(51878615,51779227)。 |
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| 摘 要： | 通过电导率法研究了水胶比、骨料含量、粉煤灰掺量和龄期对混凝土氯离子扩散系数的影响。测试结果表明,混凝土氯离子扩散系数随着水胶比的减小或骨料含量的增大而减小。粉煤灰的掺入显著增大了混凝土的抗氯离子渗透能力,最佳掺量为30%。从龄期的影响看,540 d内的混凝土氯离子扩散系数表现出显著减小的趋势,当龄期从540 d增加到1800 d时,混凝土氯离子扩散系数几乎维持不变。
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| 关 键 词： | 混凝土 氯离子扩散系数 粉煤灰 电导率法 |
Experimental study on the chloride diffusivity of long-age fly ash concrete |
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| ZHANG Jian,ZHOU Xinzhu,ZHENG Jianjun,YING Zhuoxuan,ZHANG Chenchao.Experimental study on the chloride diffusivity of long-age fly ash concrete[J].Concrete,2021(1):6-8. |
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| Authors: | ZHANG Jian ZHOU Xinzhu ZHENG Jianjun YING Zhuoxuan ZHANG Chenchao |
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| Affiliation: | (Jiyang College,Zhejiang A&F University,Zhuji 311800,China;School of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou 310014,China) |
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| Abstract: | The influence of water/binder ratio,aggregate content,fly ash content and age on chloride diffusion coefficient of concrete was studied using electrical conductivity method.The test results show that the chloride diffusion coefficient of concrete decreases with the decrease of water/binder ratio or the increase of aggregate content.The addition of fly ash significantly increases the chloride penetration resistance of concrete,with the optimal content staying at 30%.Regarding the influence exerted by age,it can be seen that the chloride diffusion coefficient of concrete shows a significant decreasing trend when the age is within 540 d,but almost remains unchanged when the age increases from 540 d to 1800 d. |
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| Keywords: | concrete chloride diffusion coefficient fly ash electrical conductivity method |
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