化学激发剂对钢渣体系的激发效果研究

Study on the excitation effect of chemical activator on steel slag system

为了探索钢渣的高效利用,通过化学激发剂对纯钢渣及钢渣水泥体系进行了激发,对水玻璃模数、浓度及养护温度对钢渣的激发效果进行了试验研究,并在此基础上,研究了化学激发剂的种类、掺量、激发剂复合及养护条件等因素对钢渣体系的激发效果。研究结果表明:水玻璃的模数为1.2~1.8时,试样强度发展较快,水玻璃的浓度为40%时,钢渣的抗压强度达到最大值,养护温度对纯钢渣—水玻璃体系的抗压强度有较大的影响,强度随养护温度的升高而增加。加入各种激发剂后水泥—钢渣体系的强度与无激发剂的水泥—钢渣体系相比均有所提高,硫酸钠是强度影响的最显著因素。4%的烧石膏、1%硫酸钠和1%的硫酸铝复合时,强度高达107.7MPa,比纯水泥的强度高了11.4%,比基准样(钢渣粉30%+水泥70%)提高了41.0%。

A large amount of steel slag produced by metallurgical industry has produced great pressure on the ecology and environment. Because of the low activity of steel slag, the utilization of steel slag is seriously restricted. In order to explore the efficient utilization of steel slag, the chemical activator on the steel slag and slag cement system were excited. The effects of the modulus, concentration and curing temperature of water glass on the excitation of steel slag were studied. On this basis, the kinds of chemical activators, the content of the additives, the compound of activator and the curing conditions have been studied. The results showed that the sample strength developed rapidly when the modulus of water glass is 1.2~1.8, the compressive strength of steel slag reached the maximum when the concentration of water glass is 40%.Curing temperature has great effect on the compressive strength of steel slag and water glass system and strength increases with increase in temperature. After adding all kinds of excitant, the strength of cement slag system is increased compared with the cement slag system without excitant, and sodium sulfate is the most significant factor of strength.When the compound 4% calcined gypsum,1% sodium sulfate and 1% aluminum sulfate, the strength of slag system up to 107.7 MPa,increased by 11.4% than the pure cement strength and 41% than the sample（30% steel slag＋70% cement）.