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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7 d水化热小于238 J/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,7 d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7 d的绝热温升可控制在50℃以内。
Using fly ash, slag powder, limestone powder, silica fume and other mineral admixture, the preparation of marine self-compacting high performance concrete, and focus on marine self-compacting high performance concrete cementitious materials hydration heat and six kinds of offshore Adiabatic temperature rise test of self - compacting high performance concrete. The experimental results show that the hydration heat of the six marine self-compacting concrete cements is less than 238 J / g for 7 days and has low heat of hydration. All six marine self-compacting high performance concrete have lower adiabatic temperature L, 7 d adiabatic temperature rise is not greater than 55 ℃. Should be used complex mineral admixture preparation of marine self-compacting high performance concrete to improve the crack resistance of large-volume concrete, and complex fly ash and slag powder and complex slag powder and lime powder better, the 7 d Adiabatic temperature rise can be controlled within 50 ℃.