| 硫酸盐侵蚀环境下混凝土断裂参数衰减规律 |
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| 引用本文： | 高原,张君,韩宇栋. 硫酸盐侵蚀环境下混凝土断裂参数衰减规律[J]. 建筑材料学报, 2011, 14(4): 465-472,477. DOI: 10.3969/j.issn.1007-9629.2011.04.006 |
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| 作者姓名： | 高原 张君 韩宇栋 |
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| 作者单位： | 清华大学结构安全与耐久教育部重点实验室,北京100084;清华大学土木工程系,北京100084 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2009CB623200) |
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| 摘 要： | 采用三点弯曲试验测取荷载-裂纹口张开位移(P-CMOD)曲线,逆推得到混凝土抗拉软化关系(σ(应力)-w(裂纹宽度))以及开裂强度、抗拉强度和断裂能等断裂参数的方法,研究了C30,C50和C80这3种强度等级混凝土在10％(质量分数)硫酸钠、10％(质量分数)硫酸镁和清水3种侵蚀环境中断裂参数的衰减规律.8个月浸泡结果...
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| 关 键 词： | 硫酸盐侵蚀 混凝土 软化关系 开裂强度 抗拉强度 |
Decay of Fracture Parameters of Concrete under Sulfate Environments |
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| GAO Yuan,ZHANG Jun,HAN Yu-dong. Decay of Fracture Parameters of Concrete under Sulfate Environments[J]. Journal of Building Materials, 2011, 14(4): 465-472,477. DOI: 10.3969/j.issn.1007-9629.2011.04.006 |
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| Authors: | GAO Yuan ZHANG Jun HAN Yu-dong |
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| Affiliation: | GAO Yuan1,2,ZHANG Jun1,HAN Yu-dong1,2(1.Key Laboratory of Structural Safty and Durability of China Education Ministry,Tsinghua University,Beijing 100084,China,2.Department of Civil Engineering,China) |
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| Abstract: | A method to solve tension softening relationship of concrete from three point bending test was used to evaluate the variation of fracture parameters,including cracking strength,tensile strength and fracture energy,of concrete under sulfate environments(10%(by mass) MgSO4 and Na2SO4) and clean water.The results of 8 months attack test show that the variation of fracture parameters under sulfate environments is influenced by the compressive strength.Along with the duration of sulfate attack,for normal strengt... |
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| Keywords: | sulfate attack concrete softening relation cracking strength tensile strength |
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