酸性聚合物碱化的砂浆性能和机理研究

Study on the Performance and the Modification Mechanism of the Alkalized Acid-polymeric Mortar

用碱对丙烯酸聚合物进行改性处理 ,并用该聚合物配制水泥砂浆。采用不同的试验方法 (包括 p H、水化率和强度 )对该聚合物水泥砂浆的性能和改性机理进行了研究。结果表明 :当石灰水含量适宜时 ,聚合物对水泥砂浆的力学性能有明显的改善。碱化聚合物的改性机理是在聚合物水泥浆内部产生交联作用 ,即 Ca2 +和

Modification treatment of acrylic acid latex was performed with saturated limewater,and cement mortars were prepared for the modified polymer.Different methods were employed to investigate the performance and modifying mechanism of the polymeric mortars.Results from experements showed that the modified polymer can improve the mechanical properties of the mortars when an optimum limewater was used.The modification mechanism of the alkalized polymer was that a cross linking effect between polymer and cement paste occurs.That is,the reaction of Ca 2+ and COO - can form a long and soft polymeric chains.