减水剂和引气剂掺量对抹灰砂浆性能影响研究  

Study on the Effect of Water Reducing Agent and Air Entraining Agent on the Performance of Plasting Mortar

作　　者：杨立民 YANG Li-min(Shandong Jianzhu University Identification and Testing Center Co.,LTD,Jinan,Shandong,250000,China)

机构地区：[1]山东建筑大学鉴定检测中心有限公司,山东济南250000

出　　处：《建材技术与应用》2024年第6期47-50,共4页Research and Application of Building Materials

摘　　要：为研究减水剂和引气剂掺量对湿拌抹灰砂浆性能的影响,通过多组试验分析砂浆的关键性能指标,得到结论为:相较于未添加减水剂的对照组,适量减水剂的掺入显著减少了砂浆的稠度损失、12 h内容重、28 d吸水率及体积失水量,并提高了砂浆的开放时间和初始含水量;进一步分析干燥收缩率数据,确定减水剂的最佳掺量为2.5%,可达到最优的干燥收缩控制效果;引气剂掺入改变了砂浆的亲水和保水性能,有效优化了砂浆的干燥收缩性能,但会导致其力学性能降低,工程应用时需权衡干燥收缩性能与力学性能之间的平衡,选择适宜的引气剂掺量。In order to study the influence of the content of water reducing agent and air entraining agent on the performance of wet mixed plastering mortar,the key performance indexes of mortar were analyzed through multiple sets of tests,and the conclusions were as follows:Compared with the control group without water reducing agent,the addition of appropriate water reducing agent significantly reduced the consistency loss,12 h bulk density,28 d water absorption and volume water loss,and increased the opening time and initial water content of the mortar.Further analysis of the drying shrinkage rate data,the optimal dosage of water reducing agent is determined to be 2.5%,which can achieve the best drying shrinkage control effect.The addition of air entraining agent changes the hydrophilic and water-retaining properties of mortar and effectively optimizes the drying shrinkage properties of mortar,but it will lead to the reduction of its mechanical properties.In engineering applications,it is necessary to balance the balance between drying shrinkage properties and mechanical properties and select the appropriate air entraining agent content.

关 键 词：抹灰砂浆 减水剂 引气剂 干燥收缩 力学性能 

分 类 号：TU578.1[建筑科学—建筑技术科学]