| 氯盐与弯曲荷载对碳化混凝土的抗冻性的影响 |
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| 引用本文： | 燕坤,余红发,麻海燕,黄东升,杨礼明. 氯盐与弯曲荷载对碳化混凝土的抗冻性的影响[J]. 武汉理工大学学报, 2010, 0(6) |
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| 作者姓名： | 燕坤 余红发 麻海燕 黄东升 杨礼明 |
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| 作者单位： | 南京航空航天大学土木工程系;南京市园林规划设计院有限责任公司; |
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| 基金项目： | 江苏省自然科学基金前期预研项目(BK2005216); 国家自然科学基金(50178044) |
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| 摘 要： | 在未加载与加载条件下,采用快冻法研究了快速碳化28 d后的普通混凝土(Ordinary Portland Cement Con-crete,OPC)、大掺量矿物掺合料混凝土(Concrete with High Content Mineral Admixture,HCMC)以及同时掺加混杂纤维、膨胀剂、引气剂和大量矿物掺合料的绿色高耐久性混凝土(Green High Durable Concrete,GHDC)在水和10%NaCl溶液中的抗冻性。结果表明,碳化作用降低了OPC和HCMC在NaCl溶液中的抗冻性,但能够改善GHDC在NaCl溶液中的抗冻性。在NaCl溶液的化学腐蚀及其与弯曲荷载的耦合作用下,碳化OPC与碳化HCMC很快发生冻融破坏,其破坏特征并非表面剥落,而是内部微裂纹的扩展。GHDC即使发生了严重的碳化作用,在NaCl溶液、弯曲荷载与冻融循环及其耦合作用下仍然具有非常高的耐久性能。
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| 关 键 词： | 混凝土 抗冻性 氯化钠 弯曲荷载 碳化作用 |
Effects of NaCl Solution and Flexural Stress on Freezing-thawing Durability of Carbonized Concretes |
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| YAN Kun,,YU Hong-fa,MA Hai-yan,HUANG Dong-sheng,YANG Li-ming. Effects of NaCl Solution and Flexural Stress on Freezing-thawing Durability of Carbonized Concretes[J]. Journal of Wuhan University of Technology, 2010, 0(6) |
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| Authors: | YAN Kun YU Hong-fa MA Hai-yan HUANG Dong-sheng YANG Li-ming |
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| Affiliation: | YAN Kun1,2,YU Hong-fa1,MA Hai-yan1,HUANG Dong-sheng1,YANG Li-ming1(1.Department of Civil Engineering,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China,2.Nanjing Institute of L,scape Architecture Design , Planning LTD,Nanjing 210013,China) |
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| Abstract: | The freezing-thawing durability of carbonized ordinary Portland cement concrete(OPC),concrete with high content mineral admixture(HCMC) and green high durable concrete(GHDC) subjected to water and 10% NaCl solution with and without loading were studied by accelerated freezing-thawing method.Results show that carbonation reduces the freezing-thawing durability of OPC and HCMC immersed NaCl solution,but it is beneficial to GHDC.When subjected to the combined action of freeze-thaw cycling,NaCl solution and fle... |
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| Keywords: | concrete freezing-thawing durability NaCl flexural stress carbonation |
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