掺再生砖粉UHPC高温后的残余断裂能研究_《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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掺再生砖粉UHPC高温后的残余断裂能研究

Study on residual fracture energy of UHPC with recycled brick powder after high temperature

2025年第2期

再生砖粉（RBP）；超高性能混凝土（UHPC）；冷却方式；断裂能；计算模型

Recycled brick powder(RBP); Ultra-high performance concrete(UHPC); Cooling method; Fracture energy; Calculation model

2025年第2期

10.19761/j.1000-4637.2025.02.053.06

国家自然科学基金项目（52178258）；河南省交通运输厅科技项目（2021J3）。

杨建强

郑州市交通基本建设质量检测站，河南郑州 450008

杨建强

杨建强.掺再生砖粉UHPC高温后的残余断裂能研究[J].混凝土与水泥制品,2025(2):53-57,62.

YANG J Q.Study on residual fracture energy of UHPC with recycled brick powder after high temperature[J].China Concrete and Cement Products,2025(2):53-57,62.

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1000

英文名 : Study on residual fracture energy of UHPC with recycled brick powder after high temperature

刊期 : 2025年第2期

关键词 : 再生砖粉（RBP）；超高性能混凝土（UHPC）；冷却方式；断裂能；计算模型

Key words : Recycled brick powder(RBP); Ultra-high performance concrete(UHPC); Cooling method; Fracture energy; Calculation model

刊期 : 2025年第2期

DOI : 10.19761/j.1000-4637.2025.02.053.06

文章编号 :

基金项目 : 国家自然科学基金项目（52178258）；河南省交通运输厅科技项目（2021J3）。

作者 : 杨建强

单位 : 郑州市交通基本建设质量检测站，河南郑州 450008

杨建强

杨建强.掺再生砖粉UHPC高温后的残余断裂能研究[J].混凝土与水泥制品,2025(2):53-57,62.

YANG J Q.Study on residual fracture energy of UHPC with recycled brick powder after high temperature[J].China Concrete and Cement Products,2025(2):53-57,62.

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摘要

参数

结论

参考文献

引用本文

摘要：研究了目标温度（25、200、400、600、800 ℃）、再生砖粉（RBP）取代率（0、30%、50%）、冷却方式（自然冷却、水冷却）对掺RBP的超高性能混凝土（RBP-UHPC）试件荷载-挠度曲线、残余断裂能的影响，并基于此建立了高温后RBP-UHPC残余断裂能的计算模型。结果表明：高温（200~800 ℃）后，RBP-UHPC试件的荷载-挠度曲线呈弯曲硬化特征；自然冷却和水冷却RBP-UHPC试件的残余断裂能随目标温度的升高均呈先增后降的趋势；在自然冷却条件下，当目标温度为25、400、600、800 ℃时，RBP-UHPC试件的残余断裂能随RBP取代率的增加呈先增后降的趋势，而当目标温度为200 ℃时，RBP-UHPC试件的残余断裂能随RBP取代率的增加呈先降后增的趋势；相较于水冷却，高温（200~800 ℃）后自然冷却RBP-UHPC试件的残余断裂能相对更高；建立的高温后RBP-UHPC残余断裂能计算模型的相关系数R2大于0.920，精度较高。

Abstract: The effects of target temperature(25, 200, 400, 600, 800 ℃), substitution rate of recycled brick powder(RBP) (0, 30%, 50%), and cooling method(naturally cooled, water cooled) on the load-deflection curves and residual fracture energy of ultra-high performance concrete specimens with RBP(RBP-UHPC) were investigated, and based on this, a model for calculating the residual fracture energy of RBP-UHPC after high temperature was established. The results show that, the load-deflection curves of RBP-UHPC specimens after high temperature(200~800 ℃) show the bending-hardening characteristics. The residual fracture energy of naturally cooled and water cooled RBP-UHPC specimens shows the tendency of first increasing and then decreasing with the increase of the target temperature. Under the condition of naturally cooled, when the target temperatures are 25, 400, 600 and 800 ℃, the residual fracture energy of RBP-UHPC specimens first increases and then decreases with the increase of the substitution rate of RBP, and when the target temperature is 200 ℃, the residual fracture energy of RBP-UHPC specimens first decreases and then increases with the increase of the substitution rate of RBP. Compared to water cooled, the residual fracture energy of naturally cooled RBP-UHPC specimens after high temperature(200~800 ℃) is relatively higher. The correlation coefficient R2 of the model for calculating the residual fracture energy of RBP-UHPC after high temperature is more than 0.920, indicating that the accuracy of the model is high.

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掺再生砖粉UHPC高温后的残余断裂能研究

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