粉煤灰是具有火山灰活性的掺合材后,合理的掺加粉煤灰,能够降低混凝土初期水化热的不利影响。粉煤灰能够改善混凝土的性能,使混凝土坍落度增加、需水量降低,改善孔结构,提高混凝土密实程度,改善耐久性。由于粉煤灰混凝土的性能较好,因而也被用在各种大大小小的工程中,其使用变得日益广泛。 Fly ash is a pozzolanic activity of the admixture, the rational incorporation of fly ash, can reduce the adverse effects of initial hydration heat of concrete. Fly ash can improve the performance of concrete, so that the slump of concrete increases, reduce water demand, improve the hole structure, improve the density of concrete, improve durability. As the performance of fly ash concrete is better, it has also been used in a variety of large and small projects, its use has become increasingly widespread.