| 膨胀剂对面板坝混凝土减缩抗裂性能的影响 |
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| 引用本文： | 赵泽锦,肖家发,周斌,杨雁钦,侯鹏坤,党玉栋,王亚洲,熊振国,王静.膨胀剂对面板坝混凝土减缩抗裂性能的影响[J].水电能源科学,2022(2):101-104. |
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| 作者姓名： | 赵泽锦 肖家发 周斌 杨雁钦 侯鹏坤 党玉栋 王亚洲 熊振国 王静 |
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| 作者单位： | 云南建设基础设施投资股份有限公司;济南大学山东省建筑材料制备及测试技术重点实验室;云南建筑工程质量检验站有限公司;云南省建筑科学研究院有限公司;云南建投第二水利水电建设有限公司 |
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| 基金项目： | 云南省科技厅科技计划项目(202004AR040018);云南省科技厅基础研究面上项目青年基金(2018FD153);云南省技术创新人才培养项目(2018HB078)。 |
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| 摘 要： | 为验证和提高堆石面板坝面板混凝土的抗裂性能,以云南省某水库堆石坝面板混凝土为例,对比研究了3种典型膨胀剂(Ⅰ型和Ⅱ型硫铝酸钙类膨胀剂、氧化镁膨胀剂)对面板混凝土强度发展、早期非接触收缩、早期抗裂、干燥收缩和限制膨胀率的影响.结果 表明,3种膨胀剂在面板混凝土中的膨胀性能发挥差异较为明显,其中使用Ⅱ型膨胀剂的补偿收缩效果...
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| 关 键 词： | 面板坝混凝土 膨胀剂 补偿收缩 面板防裂 配合比优化 |
Influence of Addition of Expansive Agents on Shrinkage and Crack-resistance of Concrete-face-rockfill-dam |
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| ZHAO Ze-jin,XIAO Jia-fa,ZHOU Bin,YANG Yan-qin,HOU Peng-kun,DANG Yu-dong,WANG Ya-zhou,XIONG Zhen-guo,WANG Jing.Influence of Addition of Expansive Agents on Shrinkage and Crack-resistance of Concrete-face-rockfill-dam[J].International Journal Hydroelectric Energy,2022(2):101-104. |
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| Authors: | ZHAO Ze-jin XIAO Jia-fa ZHOU Bin YANG Yan-qin HOU Peng-kun DANG Yu-dong WANG Ya-zhou XIONG Zhen-guo WANG Jing |
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| Affiliation: | (Yunnan Infrastructure Investment Co.,Ltd.,Kunming 650501,China;Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China;Yunnan Construction Engineering Quality Inspection Station Co.,Ltd.,Kunming 650223,China;Yunnan Institute of Building Research Co.,Ltd.,Kunming 650223,China;YCIH No.2 Water Resources and Hydro power Construction Co.,Ltd.,Kunming 650501,China) |
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| Abstract: | In order to verify and improve the crack-resistance of concrete used in concrete-face-rockfill-dam, taking a certain reservoir in Wenshan of Yunnan Province as an example, this paper investigated the effects of three typical expansion agents(type I and type II expansive agents which composed of calcium sulfoaluminate, and MgO expansive agent) on the strength development, early-age non-contact shrinkage, crack resistance and shrinkage compensation of concrete. The results show that the three kinds of expansion agents performed different shrinkage compensation effects. The shrinkage compensation effect of concrete using type II expansive agent was more obvious, including its early shrinkage rate reduced by 75.8%, 28 d-shrinkage decreased by 50.9% and no cracking was observed, 42 d-restained shrinkage reduced by 83.3%. Meanwhile, there was a strong relationship between the expansion process and the development of concrete strength(56 d compressive strength increased 23.6%). The research can provide reference for concrete engineering mix ratio optimization to reduce the risk of surface cracking. |
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| Keywords: | concrete face dam expansive agent shrinkage compensation panel crack prevention mix proportioning optimization |
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