顾青山,林喜华*,代理堃,谭 松,黄桂超
顾青山,林喜华,代理堃,等.耐热600 ℃混凝土的配合比设计及性能研究[J].混凝土与水泥制品,2025(4):25-30.
GU Q S,LIN X H,DAI L K,et al.Study on design and performance of heat-resistant concrete at 600 ℃[J].China Concrete and Cement Products,2025(4):2025(4):25-30.
耐热600 ℃混凝土的配合比设计及性能研究
顾青山,林喜华*,代理堃,谭 松,黄桂超
顾青山,林喜华,代理堃,等.耐热600 ℃混凝土的配合比设计及性能研究[J].混凝土与水泥制品,2025(4):25-30.
GU Q S,LIN X H,DAI L K,et al.Study on design and performance of heat-resistant concrete at 600 ℃[J].China Concrete and Cement Products,2025(4):2025(4):25-30.
摘 要:通过分析不同骨料(石灰石骨料、玄武岩骨料、高铝骨料)的化学组分与耐热性能,结合胶凝材料体系中粉煤灰与硅灰对耐热性能的影响,制备了不同强度等级(C30~C60)的耐热混凝土,并研究了其耐热性能、抗热震性能。结果表明:玄武岩骨料可作为耐热混凝土的骨料使用;复掺粉煤灰和硅灰既能提高混凝土的残余强度,还能降低质量损失率和线性收缩率,可以有效提高混凝土的耐热性能;所制备的耐热混凝土不仅工作性良好,而且强度和耐热性能优异。
Abstract: By analyzing the chemical composition and heat resistance of different aggregates(limestone aggregate, basalt aggregate, high alumina aggregate), combined with the influence of fly ash and silica fume on heat resistance in the cementitious material system, heat-resistant concrete of various strength grades(C30~C60) was prepared, and their heat resistance and thermal shock resistance were evaluated. The results indicate that basalt aggregates are suitable for use as aggregates in heat-resistant concrete. The incorporation of fly ash and silica fume can not only improve the residual strength of concrete, but also reduce the mass loss rate and linear shrinkage rate, thereby significant enhancing the heat resistance of concrete. The developed heat-resistant concrete exhibits excellent workability, strength and heat resistance.
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