According to each ingredients ( water retaining admixture , polymer , inorganic mineral ) " effect to mortar ' s behaviors ( water relentivity , strength , contractility ) in exclusive mortar " s composite addition , the text defines each ingredient ' s quantity scope , then define the mix through cross experiment . we compared the aac exclusive mortar ' s behaviors such as water relentivity , compressive strength , binding strength , shrinkage , flexural strength and others to ordinary mortar ' s ones , it turn out to be that there is much improve in former ' s behaviors such as water relentivity , compressive strength , binding strength , shrinkage , flexural strength etc , it also shows that the aac exclusive mortar can improve the crack in aac brick walling to a certain degree 并根据专用砂浆中复合外加剂的各个组分(保水剂、聚合物、无机矿物等)对砂浆主要性能(保水性、强度、收缩性、抗弯性等)的影响来确定每个组分的掺量范围，再通过正交实验确定最佳配合比，然后就普通砂浆与专用砂浆的保水性、抗压强度和粘结强度、收缩值、抗弯曲性能以及其它性能进行了对比，对比结果表明专用砂浆的保水性、抗压强度和粘结强度、收缩值、抗弯曲性能以及其它性能较普通砂浆都有了很大的提高，说明加气混凝土砌块专用砂浆在一定程度上可以改善加气混凝土砌块墙体的开裂情况。
The influence of retarder on the seaing time and ultimate strength of gypsum plaster was investigated in this paper . the experimental results indicate that the effect of single retarder , such as citric acid , is inferior to that of composite retarder which was made of blending citric acid with a few portland cement ( about 0 . 5 ? , by weight ) . the effect of different water - retention agents , such as polyvinyl alcohol ( pva ) , carboxymethyl cellulose ( cmc ) , and na - bentonite , etc . , was also studied , and the results demonstrate that by means of adding organic and inorganic water - retention agent simultaneously the water - retention of plastering slurry can obviously be improved . the optimal mix proportion of gypsum plaster suitable to finish coat of walls and ceilings of buildings has been got by use of factorial experiment with orthogonal array accounting for interactions between factors each other 研究了分别以柠檬酸、柠檬酸与普通硅酸盐水泥复合物作缓凝剂,调节粉刷石膏的凝结时间,并对比2种缓凝体系对石膏抗折、抗压强度的影响.比较不同保水剂(聚乙烯醇、羧甲基纤维素)以及相同量的保水剂在不同工艺流程下保水效果上的区别.探索了有机保水剂和无机保水剂对粉刷石膏的保水性的影响.结果表明,柠檬酸与普通硅酸盐水泥的复合缓凝剂比单纯的柠檬酸更能有效地延缓建筑石膏的凝结,同时建筑石膏的抗折、抗压强度降低幅度减小
