关键词: 粉煤灰;矿渣;碱式硫酸镁水泥;抗蚀系数;吸水率

Abstract: In order to study the corrosion resistance properties of basic magnesium sulfate cement to sulfate attack, the flexural strength, compressive strength, mass change and hydrations products of cement with different material component were analyzed after immersing in water and sodium sulfate solution for different ages.The results show that fly ash improved the corrosion resistance coefficient of flexural strength and slag improved the corrosion resistance coefficient of compressive strength significantly in the environment of 0.3 mol/L sodium sulfate solution.The corrosion resistance coefficient of flexural strength and corrosion resistance coefficient of compressive strength are increased by 0.61 and 0.15 respectively compared with the basic magnesium sulfate cement without mineral admixture after immersing in sodium sulfate solution 180 d.The water absorption of the basic magnesium sulfate cement with fly ash and slag is lower than that without mineral admixture.At the same time,the incorporation of fly ash and slag can effectively inhibit the formation of Mg(OH)2 crystal phase.

Key words: fly ash;slag;basic magnesium sulfate cement;corrosion resistance coefficient;water absorption