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EXPERIMENTAL STUDY ON ADIABATIC TEMPERATURE RISE OF HIGH PERFORMANCE SELF-COMPACTING CONCRETE FOR MARINE STRUCTURE
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摘要: 采用粉煤灰、矿渣粉、石灰石粉、硅灰等矿物掺合料,配制出海工自密实高性能混凝土,并重点开展海工自密实高性能混凝土胶凝材料的水化热以及六种海工自密实高性能混凝土的绝热温升试验。试验研究结果表明,六种海工自密实混凝土胶凝材料7d水化热小于238J/g,具有较低的水化热;六种海工自密实高性能混凝土均具有较低的绝热温升,7d的绝热温升不大于55℃。宜采用复掺矿物掺合料配制海工自密实高性能混凝土,提高大体积混凝土抗裂性,且复掺粉煤灰和矿渣粉以及复掺矿渣粉与石灰石粉效果较好,其7d的绝热温升可控制在50℃以内。
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关键词:
- 粉煤灰 /
- 石灰石粉 /
- 海工自密实高性能混凝土 /
- 水化热 /
- 绝热温升
Abstract: By using fly ash,slag powder,limestone powder and silica fume,high performance self-compacting concrete for marine structure was developed and the shrinkage of high performance self-compacting concrete for marine structure was emphatically studied.Experimental results show that the 7 d hydration heat of binder material for six kinds of high performance self-compacting concrete for marine structure is less than 238 J/g,and 7 d adiabatic temperature rise for six kinds of high performance self-compacting concrete for marine structure isn't greater than 55 ℃.The making up method with composite mineral admixture is feasible to improve crack resistance of mass concrete.Moreover,the effect with fly and slag powder,and slag powder and limestone powder is best,7 d adiabatic temperature rise of them can be controlled in 50 ℃. -
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