| 图像分析宏观孔孔隙率对混凝土抗压强度的影响 |
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| 引用本文： | 朱洪波,闫美珠,李晨,成轶杰,吴凯凡.图像分析宏观孔孔隙率对混凝土抗压强度的影响[J].建筑材料学报,2015,18(2):275-280. |
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| 作者姓名： | 朱洪波 闫美珠 李晨 成轶杰 吴凯凡 |
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| 作者单位： | 同济大学先进土木工程材料教育部重点实验室,上海,201804 |
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| 基金项目： | 国家自然科学基金资助项目（51302189） |
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| 摘 要： | 采用不同种类的气孔调节材料配制出15种不同含气量(体积分数)的混凝土.研究了混凝土3,7,28d抗压强度与含气量之间的关系;采用图像法研究了不同含气量混凝土中孔径大于200×103 nm的宏观孔孔隙率(体积分数);对比分析了混凝土宏观孔孔隙率和含气量对混凝土28d抗压强度的影响规律.结果表明:混凝土28d抗压强度与含气量的线性关系较强,而混凝土3d和7d抗压强度与含气量的线性关系较弱;混凝土28d抗压强度对宏观孔孔隙率变化的敏感性显著高于其对含气量变化的敏感性,即混凝土中宏观孔孔隙率变化对其28d抗压强度影响更大;调整气孔调节材料的品种,可使混凝土含气量从1.5%提高到9.0%,而宏观孔孔隙率只从0.81%增加到1.48%,其所占含气量的比例从超过55%降低到16%左右,即可在有效调节混凝土含气量的同时,控制其宏观孔的数量.
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| 关 键 词： | 混凝土 含气量 宏观孔孔隙率 抗压强度 图像法 |
| 收稿时间： | 2013/9/30 0:00:00 |
| 修稿时间： | 1/6/2014 12:00:00 AM |
Analysis of the Influence of Porosity of Macroscopic Pore on Concrete Strength by Image Method |
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| ZHU Hongbo,YAN Meizhu,LI Chen,CHENG Yijie and WU Kaifan.Analysis of the Influence of Porosity of Macroscopic Pore on Concrete Strength by Image Method[J].Journal of Building Materials,2015,18(2):275-280. |
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| Authors: | ZHU Hongbo YAN Meizhu LI Chen CHENG Yijie and WU Kaifan |
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| Affiliation: | Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University, Shanghai 201804, China,Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University, Shanghai 201804, China,Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University, Shanghai 201804, China,Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University, Shanghai 201804, China and Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University, Shanghai 201804, China |
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| Abstract: | |
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| Keywords: | concrete air content porosity of macroscopic pore compressive strength image method |
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