劉 立1,趙宇洋2,徐 寧1,季彩云1
劉立,趙宇洋,徐寧,等.HCSA抗裂增強混凝土的應用研究[J].混凝土與水泥制品,2022(7):30-34,39.
LIU L, ZHAO Y Y,XU N,et al.Application Study of HCSA Anti-cracking Reinforcement Materials in Concrete[J].China Concrete and Cement Products,2022(7):30-34,39.
HCSA抗裂增強混凝土的應用研究
劉 立1,趙宇洋2,徐 寧1,季彩云1
劉立,趙宇洋,徐寧,等.HCSA抗裂增強混凝土的應用研究[J].混凝土與水泥制品,2022(7):30-34,39.
LIU L, ZHAO Y Y,XU N,et al.Application Study of HCSA Anti-cracking Reinforcement Materials in Concrete[J].China Concrete and Cement Products,2022(7):30-34,39.
摘 要:研究了HCSA抗裂增強材料對混凝土強度、限制膨脹率、溫度應力的影響,并分析了蒸養與非蒸養條件下摻抗裂增強材料混凝土的強度發展變化情況。結果表明:抗裂增強材料可顯著提高混凝土的抗裂性,當水膠比為0.36、抗裂增強材料摻量為70 kg/m3時,混凝土強度發展良好,且限制膨脹率較高;抗裂增強材料可顯著降低混凝土的溫度敏感性,當抗裂增強材料摻量為50 kg/m3時,混凝土試件最大壓應力提高了119%,斷裂應力下降了13%,斷裂溫度降低了37%;采用抗裂增強材料代替粉煤灰,在免蒸養條件下,混凝土1 d強度比提高了192%,在蒸養條件下,1 d強度比提高了196%。
Abstract: The effects of HCSA anti-cracking reinforcement materials on the strength, limiting expansion rate and temperature stress of concrete were investigated. The strength development of concrete under steam curing and non-steam curing after adding anti-cracking reinforcement materials were analyzed. The results show that the HCSA anti-cracking reinforcement material can significantly improve the crack resistance of concrete. When the W/B is 0.36 and the content of the anti-cracking reinforcement material is 70 kg/m3, the concrete strength developed well, and the limiting expansion rate is high. The anti-cracking reinforcement material can significantly reduce the temperature sensitivity of concrete. When the anti-cracking reinforcement material is added at 50 kg/m3, the maximum compressive stress of concrete specimens is increased by 119%, the fracture stress is reduced by 13% and the fracture temperature is reduced by 37%. When fly ash is instead by anti-cracking reinforcement material, the 1 d strength ratio of concrete increases by 192% under the non-steam curing conditions, the 1 d intensity ratio increases by 196% under the steam curing conditions.
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