摘要
分析了高性能混凝土的早期自收缩特点,论述了其早期自收缩机理,针对高性能混凝土自收缩集中在早期、对后期裂缝影响较大的特点,提出掺用粉煤灰,利用其早期水化速度慢来改善高强混凝土硬化速度,从而降低混凝土早期自收缩程度,提高耐久度。
Analysis is made on the characteristics and mechanism of autogenous shrinkage of concrete, especially at early ages. Fly ash is blended to reduce the large autogenous shrinkage of high-strength concrete, and to improve the hardening speed of water. Consequently the shrinkage degree will be reduced at early age with increase of durability.
出处
《交通科技与经济》
2005年第5期7-8,43,共3页
Technology & Economy in Areas of Communications
