再生砖骨料混凝土损伤机理研究

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci2303145w

Zhengjiang Wang, Yang Yang, Y. Su, J. Wang, Zhongping Wei, Yajuan Li, Jiawei Li, Chao Zhu

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引用次数: 0

摘要

用再生砖骨料代替天然骨料具有很大的环保潜力。为研究再生砖骨料混凝土的劣化机理，设计了8组不同水灰比、最大骨料粒径和粗骨料型比的再生砖骨料亚轻量化混凝土，进行力学性能试验，分析再生砖骨料混凝土的骨料界面特性和损伤机理。结果表明:替代比和水灰比的增大导致混凝土抗压强度和劈裂抗拉强度显著降低，最大骨料粒径对强度的影响较小;与再生混凝土骨料-砂浆界面不同，再生砖骨料-砂浆界面微观结构致密，界面性能增强。再生砖骨料混凝土处于无界面损伤模式，砖骨料强度是决定混凝土力学性能的主要影响因素。

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Damage mechanism of concrete with recycled brick aggregate

WIt has great environmental potential to replace natural aggregates by recycled brick aggregates. To investigate the deterioration mechanism of recycled brick aggregate concrete, this paper designed eight groups of recycled brick aggregate sub-lightweight concrete with different water-cement ratios, maximum aggregate sizes and coarse aggregate type ratios, and carried out mechanical property test to analyze the aggregate interface characteristics and the damage mechanism of recycled brick aggregate concrete. The results show that the increase of replacement ratio and water-cement ratio leads to a significant decrease of compressive strength and splitting tensile strength of concrete, and the influence of the maximum aggregate size on strength is small. Unlike the recycled concrete aggregate - mortar interface, the microstructure of recycled brick aggregate - mortar interface is dense and the interface performance is enhanced. Recycled brick aggregate concrete is in non-interface damage mode, and the strength of brick aggregate is the main influence to determine the mechanical properties of concrete factor.

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.