| 内养护措施改善混凝土收缩开裂性能 |
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| 引用本文： | 陈德鹏,钱春香,赵洪凯,高桂波.内养护措施改善混凝土收缩开裂性能[J].特种结构,2007,24(1):57-60. |
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| 作者姓名： | 陈德鹏 钱春香 赵洪凯 高桂波 |
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| 作者单位： | 1. 东南大学材料科学与工程学院,南京,210096
2. 东南大学材料科学与工程学院,南京,210096;东南大学绿色建材技术研究所,南京,210096 |
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| 基金项目： | 教育部跨世纪优秀人才培养计划;江苏省南京市建设局资助项目 |
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| 摘 要： | 通过对使用预浸轻集料或高吸水树脂(SAP)替代部分集料的混凝土试件的早期开裂、限制收缩及非限制收缩的试验,探讨了混凝土内养护措施对改善混凝土收缩开裂性能的影响,并比较了不同种类养护方式的改善效果,并从理论上分析了内养护措施改善混凝土开裂及收缩的机理。试验结果表明,内养护措施可以很好地改善混凝土的收缩开裂性能,尤其是SAP的使用可以使混凝土的开裂及收缩减小30-50%,在易于发生收缩开裂和(或)不易养护的结构中有重要的推广应用价值。
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| 关 键 词： | 内养护 预浸轻集料 高吸水树脂 早期开裂 收缩 |
Improvement about the Cracking and Shrinkage Characteristic of Concrete when Using Internal Curing |
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| Chen Depeng,Qian Chunxiang,Zhao Hongkai,Gao Guibo.Improvement about the Cracking and Shrinkage Characteristic of Concrete when Using Internal Curing[J].Special Structures,2007,24(1):57-60. |
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| Authors: | Chen Depeng Qian Chunxiang Zhao Hongkai Gao Guibo |
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| Abstract: | The influence of internal curing on early-age cracking,strained shrinkage and unstrained shrinkage of concrete is studied by experimental investigation and theoretical analysis.The effects of using pre-soaked ceramsite,perlite and SAP are compared and the improvement mechanism is analyzed.The results reveal that internal curing can effectively improve the cracking and shrinkage of concrete,especially for using SAP,a 30-50% decrease can be achieved.The structure which is prone to cracking and(or)not fit for curing will benefit from using pre-soaked LWA and SAP to substitute some aggregate in concrete. |
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| Keywords: | Internal curing Pre-soaked LWA SAP Early-age cracking Shrinkage |
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