| 冻融循环下掺锂渣再生混凝土损伤试验 |
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| 引用本文： | 秦拥军,刘珂,许富威,崔壮,张亚斌.冻融循环下掺锂渣再生混凝土损伤试验[J].科学技术与工程,2019,19(19):262-267. |
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| 作者姓名： | 秦拥军 刘珂 许富威 崔壮 张亚斌 |
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| 作者单位： | 新疆大学建筑工程学院,新疆大学建筑工程学院,新疆大学建筑工程学院,新疆大学建筑工程学院,新疆大学建筑工程学院 |
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| 基金项目： | 以锂渣粉为矿物掺合料再生混凝土性能及本构关系研究 ;新疆地区混凝土试件裂纹演化的分形特征及其协同演化模型研究 |
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| 摘 要： | 针对冻融损伤分析再生粗骨料取代率和锂渣掺量对混凝土质量、动弹性模量以及抗压强度的影响。试验结果表明:过多使用再生粗骨料不利于抗冻性的提高;适量添加锂渣可以有助减轻冻融循环给混凝土带来质量损失的影响,且随着掺入量的增加,抗冻性能呈现先提高后降低的趋势,当掺量为20%时,抗冻性能达到最优。由试验数据拟合得到用再生粗骨料取代率以及锂渣掺量两因素的混凝土冻融后抗压强度劣化方程。
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| 关 键 词： | 再生粗骨料 锂渣 再生混凝土 抗冻性 |
| 收稿时间： | 2019/1/7 0:00:00 |
| 修稿时间： | 2019/3/8 0:00:00 |
Experimental Study on Damage of Recycled Concrete with Lithium Slag under Freeze-thaw Cycle |
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| qin yong jun,liu ke,xu fu wei,cui zhuang and zhang ya bin.Experimental Study on Damage of Recycled Concrete with Lithium Slag under Freeze-thaw Cycle[J].Science Technology and Engineering,2019,19(19):262-267. |
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| Authors: | qin yong jun liu ke xu fu wei cui zhuang and zhang ya bin |
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| Institution: | School Civil Engineering and Architecture, Xinjiang University,School Civil Engineering and Architecture, Xinjiang University,School Civil Engineering and Architecture, Xinjiang University,School Civil Engineering and Architecture, Xinjiang University,School Civil Engineering and Architecture, Xinjiang University |
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| Abstract: | In order to obtain the effects of recycled coarse aggregate replacement rate and lithium slag content on concrete quality, dynamic elastic modulus and compressive strength, the single factor of freeze-thaw damage was used to analyze that. The test results show that excessive use of recycled coarse aggregate is not conducive to the improvement of frost resistance, the proper addition of lithium slag can help to reduce the mass loss caused by the freeze-thaw cycle, and with the increase of the amount of anti-freeze, the frost resistance will increase first and then decrease. The antifreeze performance is optimized when the amount of lithium slag is 20%. At the same time, according to the test results, the regression equation of compressive strength after concrete freeze-thaw is achieved by fitting the replacement ratio of recycled aggregate and the amount of lithium slag. |
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| Keywords: | recycled coarse aggregate lithium slag recycled concrete frost resistance |
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