【摘要】 选用了两个系列的减水剂进行了减水剂饱和点与水泥净浆流动性、砂浆强度及收缩性能关系的研究。研究表明,减水剂的饱和点掺量是水泥浆体获得最大流动性时的最小掺量。饱和点不但对水泥浆的流动性能有意义,对水泥的胶砂强度和收缩也同样有意义。一般而言,当减水剂掺量在饱和点附近时水泥胶砂强度达到最大值,掺量超过饱和点后,强度会明显下降;随着减水剂掺量的增大,水泥砂浆的干燥收缩随之增大。更多还原

【Abstract】 The relationship between the saturation point of the water reducer and fluidity of cement paste,mortar strength and shrinkage properties with two different kinds of water-reducers is studied in the paper.The results show that the saturation point is the best dosage of water-reducer,at which cement paste reaches the highest fluidity with minimum water-reducer dosage; the saturation point not only has significance on the fresh cement paste,but also on the mortar strength and shrinkage properties.Generally speaking,the cement mortar strength reaches the max value when the content of water reducer is nearly the saturation point. The strength decreases remarkably when the content of water reducer exceeds the saturation point.The dry shrinkage of cement mortar increased with the increasing of the content of water reducer.更多还原