| 摘要: |
| 通过使用不同的发气材料来改善加气混凝土试样的孔隙特征，并基于MATLAB平台，对试样截面进行图像处理，分别对其孔隙特征进行了表征；测试了试样冻融后的质量损失率和抗压强度损失率，以分析孔隙特征对加气混凝土力学性能和抗冻性能的影响.结果表明：利用MATLAB平台对加气混凝土试样的截面照片进行数据采集并分析，可实现对加气混凝土宏观孔和细观孔的信息提取与表征；以铝粉加上引气剂作为发气材料的试样，能够达到墙体材料冻融循环试验的测试标准；试样中的连通孔越多，平均孔径越大，则水化产物搭接的结构就越疏松，试样的吸水率越大，经过15次冻融循环后试样的质量损失率和抗压强度损失率也越大. |
| 关键词: 孔隙特征 加气混凝土 力学性能 抗冻性能 |
| DOI：10.3969/j.issn.1007 9629.2017.01.008 |
| 分类号: |
| 基金项目:国家高技术研究发展计划（863计划）资助项目（SS2012AA062405）；国家自然科学基金资助项目（51078241） |
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| Effect of MATLAB Pore Characteristic on Performance of Aerated Concrete Prepared with Iron Tailings |
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DONG Yue1, YANG Zhiqiang1, GAO Qian1, DING Xiangqun2
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1.Key Laboratory of High Efficient Mining and Safety of Metal Mine of Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;2.School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China
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| Abstract: |
| By using different aerated materials to improve the pore characteristics of aerated concrete samples， and based on MATLAB platform， cross sectional images of the samples were processed to characterize their pore characteristics， and those samples were characterized by mass loss and compressive strength loss test after thawing， the influence of pore characteristics on the mechanical properties and frost resistance of aerated concrete were analyzed. Studies have shown that the method of sectional photograph with MATLAB could be used to collect and analyze the data of cross sectional images， and characterize different pore information； the sample with Al powder and entraining agent could reach the test standard of wall materials on freeze thaw cycle experiments； as the number of communication pore， the average pore size and the loose structure made of hydration increase， the water absorption of the samples increases， after 15 times freeze thaw cycles， the loss ratio of samples mass and compressive strength increase. |
| Key words: pore characteristic aerated concrete mechanical property frost resistance |
