机制砂取代率对高温后混凝土性能的影响_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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机制砂取代率对高温后混凝土性能的影响

Effect of Mechanism Sand Replacement Rate on the Performance of Concrete After High Temperature

2023年第6期

机制砂取代率；高温；表观密度；质量损失；强度损失

Mechanism sand replacement rate; High temperature; Apparent density; Mass loss; Strength loss

2023年第6期

10.19761/j.1000-4637.2023.06.026.06

逄鲁峰1，庞伟琪1，张硕2，赵勇1，安昊文1，黄凌苗1

1.山东建筑大学土木工程学院，山东济南 250101；2.中建八局第二建设有限公司，山东济南 250000

逄鲁峰1，庞伟琪1，张硕2，赵勇1，安昊文1，黄凌苗1

逄鲁峰,庞伟琪,张硕,等.机制砂取代率对高温后混凝土性能的影响[J].混凝土与水泥制品,2023(6):26-30,35.

PANG L F,PANG W Q,ZHANG S,et al.Effect of Mechanism Sand Replacement Rate on the Performance of Concrete After High Temperature[J].China Concrete and Cement Product,2023(6):26-30,35.

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摘要：研究了不同机制砂取代率对混凝土表观密度和高温后混凝土试件颜色变化、质量损失以及抗压强度的影响，建立了机制砂取代率与混凝土的表观密度、不同机制砂取代率下的温度与混凝土的质量损失率、不同机制砂取代率下的温度与混凝土的抗压强度损失的关系。结果表明：随着机制砂取代率的提高，混凝土的表观密度逐渐增大；当温度为200~1 000 ℃时，混凝土试件颜色由灰色变至红色再到白色，且温度越高试件开裂及脱落现象越严重，质量损失也越大，全机制砂混凝土的质量损失低于全河砂混凝土；当温度为200 ℃时，混凝土的抗压强度损失率逐渐降低；当温度超过200 ℃时，混凝土的抗压强度损失率先升高后降低，20%机制砂取代率下，其抗压强度损失率最高，全河砂混凝土的抗压强度损失率最低；基于试验数据建立的拟合函数的拟合度较高。 Abstract: By studying the effect of different mechanism sand replacement rate on the apparent density of concrete, color change, mass loss and compressive strength loss of specimens after high temperature tests, the relationships between mechanism sand replacement rate and apparent density of concrete, temperature and mass loss rate under different mechanism sand replacement rates, and temperature and strength loss of concrete under different mechanism sand replacement rates were established. The results show that the apparent density of concrete gradually increases as the replacement rate of mechanism sand increases. The color of specimen changes from gray to red to white after 200~1 000 ℃, and the higher the temperature, the more serious the cracks and peeling phenomenon is, and the greater the quality loss is, and the quality loss of all mechanism sand concrete is lower than that of all river sand concrete. The compressive strength loss rate gradually decreases at 200 ℃, and increases first and then decreases beyond 200 ℃. The compressive strength loss rate is highest at 20% mechanism sand replacement rate, and the compressive strength loss rate is lowest for all river sand concrete, the fitting functions based on the test datas are established with good fit.

英文名 : Effect of Mechanism Sand Replacement Rate on the Performance of Concrete After High Temperature

刊期 : 2023年第6期

关键词 : 机制砂取代率；高温；表观密度；质量损失；强度损失

Key words : Mechanism sand replacement rate; High temperature; Apparent density; Mass loss; Strength loss

刊期 : 2023年第6期

DOI : 10.19761/j.1000-4637.2023.06.026.06

文章编号 :

基金项目 :

作者 : 逄鲁峰1，庞伟琪1，张硕2，赵勇1，安昊文1，黄凌苗1

单位 : 1.山东建筑大学土木工程学院，山东济南 250101；2.中建八局第二建设有限公司，山东济南 250000

逄鲁峰1，庞伟琪1，张硕2，赵勇1，安昊文1，黄凌苗1

逄鲁峰,庞伟琪,张硕,等.机制砂取代率对高温后混凝土性能的影响[J].混凝土与水泥制品,2023(6):26-30,35.

PANG L F,PANG W Q,ZHANG S,et al.Effect of Mechanism Sand Replacement Rate on the Performance of Concrete After High Temperature[J].China Concrete and Cement Product,2023(6):26-30,35.

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摘要

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结论

参考文献

引用本文

Abstract: By studying the effect of different mechanism sand replacement rate on the apparent density of concrete, color change, mass loss and compressive strength loss of specimens after high temperature tests, the relationships between mechanism sand replacement rate and apparent density of concrete, temperature and mass loss rate under different mechanism sand replacement rates, and temperature and strength loss of concrete under different mechanism sand replacement rates were established. The results show that the apparent density of concrete gradually increases as the replacement rate of mechanism sand increases. The color of specimen changes from gray to red to white after 200~1 000 ℃, and the higher the temperature, the more serious the cracks and peeling phenomenon is, and the greater the quality loss is, and the quality loss of all mechanism sand concrete is lower than that of all river sand concrete. The compressive strength loss rate gradually decreases at 200 ℃, and increases first and then decreases beyond 200 ℃. The compressive strength loss rate is highest at 20% mechanism sand replacement rate, and the compressive strength loss rate is lowest for all river sand concrete, the fitting functions based on the test datas are established with good fit.

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机制砂取代率对高温后混凝土性能的影响

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