不同膨胀剂对 CA 砂浆力学性能及收缩变形的影响

摘要

研究了水化硫铝酸钙型和氢氧化钙型两种不同膨胀剂对CA砂浆力学性能的影响和收缩变形的改善，研究发现，在配合比相同的情况下，采用内掺法时，CA砂浆的7 d和28 d抗压强度随着水化硫铝酸钙型膨胀剂掺量的增加而减小，而氢氧化钙型膨胀剂对CA砂浆的抗压强度影响很小。%The paper studies the impact of two kinds of expansive agents of hydrated calcium aluminates and calcium hydroxide upon mechanical CA mortar properties,describes its shrinkage deformation improvement. The research results show that:under same mixing proportion conditions, the CA mortar,7 d and 28 d anti-compression strength will reduce with the hydrated calcium aluminates expansive admixture increasing,the im-pact of calcium hydroxide expansive agent upon the anti-compaction strength of CA mortar is rather small as well.