高温后蒸压加气混凝土物理力学性能试验研究

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发布时间：2020-01-06 00:00:00

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高温后蒸压加气混凝土物理力学性能试验研究

Experimental Study on Physical and Mechanical Properties of Autoclaved Aerated Concrete After High Temperature

2023年第6期

蒸压加气混凝土；温度；物理力学性能；单轴抗压强度；微观结构

Autoclaved aerated concrete(AAC); Temperature; Physical and mechanical property; Uniaxial compression strength; Microstructure

2023年第6期

10.19761/j.1000-4637.2023.06.070.05

安徽省重点研究与开发计划项目（202004a07020027、202104h04020024）。

唐凌霄1,2，姚华彦1,2，王静峰1,2，周璟1,2，甘嘉瑞1,2

1.合肥工业大学土木与水利工程学院，安徽合肥 230009；2.合肥工业大学工程结构与材料安徽省重点实验室，安徽合肥 230009

唐凌霄1,2，姚华彦1,2，王静峰1,2，周璟1,2，甘嘉瑞1,2

唐凌霄,姚华彦,王静峰,等.高温后蒸压加气混凝土物理力学性能试验研究[J].混凝土与水泥制品,2023(6):70-74.

TANG L X,YAO H Y,WANG J F,et al.Experimental Study on Physical and Mechanical Properties of Autoclaved Aerated Concrete After High Temperature[J].China Concrete and Cement Product,2023(6):70-74.

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1000

摘要：为了研究高温对蒸压加气混凝土（AAC）物理力学特性的影响，对不同温度作用后的AAC试件进行了质量损失、纵波波速、单轴抗压强度等性能试验，并结合XRD及SEM测试，分析了温度对AAC成分与微观结构的影响。结果表明：随着温度的增加，高温后AAC试件表面颜色逐渐加深，质量损失不断增加；当温度低于100 ℃时，AAC试件的纵波波速略有增加，当温度高于100 ℃时不断下降；常温至300 ℃作用下，AAC试件的单轴抗压强度不断增大，超过300 ℃后逐渐下降；温度为900 ℃时，AAC试件碎裂，并失去了承载能力；随着温度的增加，AAC的物相成分和微观结构都发生不同程度的变化，由此导致AAC宏观物理力学特性发生相应变化。 Abstract: In order to study the influence of high temperature on the physical and mechanical properties of autoclaved aerated concrete(AAC), the physical and mechanical properties of AAC specimens treated with different temperatures such as mass loss, wave velocity and uniaxial compressive strength were tested. XRD and SEM were used to explore the effects of temperature on the composition and microstructure of AAC. The results show that the surface color of AAC specimens gradually deepens and the mass loss grows with the increase of temperature. The wave velocity increases slightly at the 100 ℃, and decreases continuously when the temperature is above 100 ℃. The uniaxial compressive strength of AAC specimen keeps increasing from room temperature to 300 ℃, and decreases when it exceeds 300 ℃. When the temperature reaches 900 ℃, the AAC specimens crack and lose the bearing capacity. With the increase of temperature, the phase composition and microstructure of AAC change to varying degrees, which leads to the corresponding changes in the macroscopic physical and mechanical properties of AAC.

英文名 : Experimental Study on Physical and Mechanical Properties of Autoclaved Aerated Concrete After High Temperature

刊期 : 2023年第6期

关键词 : 蒸压加气混凝土；温度；物理力学性能；单轴抗压强度；微观结构

Key words : Autoclaved aerated concrete(AAC); Temperature; Physical and mechanical property; Uniaxial compression strength; Microstructure

刊期 : 2023年第6期

DOI : 10.19761/j.1000-4637.2023.06.070.05

文章编号 :

基金项目 : 安徽省重点研究与开发计划项目（202004a07020027、202104h04020024）。

作者 : 唐凌霄1,2，姚华彦1,2，王静峰1,2，周璟1,2，甘嘉瑞1,2

单位 : 1.合肥工业大学土木与水利工程学院，安徽合肥 230009；2.合肥工业大学工程结构与材料安徽省重点实验室，安徽合肥 230009

唐凌霄1,2，姚华彦1,2，王静峰1,2，周璟1,2，甘嘉瑞1,2

唐凌霄,姚华彦,王静峰,等.高温后蒸压加气混凝土物理力学性能试验研究[J].混凝土与水泥制品,2023(6):70-74.

TANG L X,YAO H Y,WANG J F,et al.Experimental Study on Physical and Mechanical Properties of Autoclaved Aerated Concrete After High Temperature[J].China Concrete and Cement Product,2023(6):70-74.

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摘要

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参考文献

引用本文

Abstract: In order to study the influence of high temperature on the physical and mechanical properties of autoclaved aerated concrete(AAC), the physical and mechanical properties of AAC specimens treated with different temperatures such as mass loss, wave velocity and uniaxial compressive strength were tested. XRD and SEM were used to explore the effects of temperature on the composition and microstructure of AAC. The results show that the surface color of AAC specimens gradually deepens and the mass loss grows with the increase of temperature. The wave velocity increases slightly at the 100 ℃, and decreases continuously when the temperature is above 100 ℃. The uniaxial compressive strength of AAC specimen keeps increasing from room temperature to 300 ℃, and decreases when it exceeds 300 ℃. When the temperature reaches 900 ℃, the AAC specimens crack and lose the bearing capacity. With the increase of temperature, the phase composition and microstructure of AAC change to varying degrees, which leads to the corresponding changes in the macroscopic physical and mechanical properties of AAC.

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高温后蒸压加气混凝土物理力学性能试验研究

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