文档介绍：重庆大学硕士学位论文中文摘要摘要砂浆是建筑工程中用量巨大的一类建筑材料,传统砂浆在施工现场配制,存在着计量不准确、搅拌不均匀、砂浆的和易性不易控制、质量难以保证等缺点, 而且污染环境、效率低下,难以满足建筑工程不同部位对砂浆的特殊要求。千拌砂浆以其品质稳定、工效提高、质量优异、品种齐全、施工性能良好、使用方便等优点,正被大力推广和使用。另一方面,新型墙体材料在使用过程中经常出现墙体开裂、渗漏的现象,因此急需一种具有抗开裂性能的砂浆与新型墙材配套使用。基于此,本论文着重研究了干拌砂浆的抗裂性。,因此工程中95%以上的砂浆为特细砂水泥砂浆。特细砂水泥砂浆收缩大,韧性低,易开裂,所以收缩率、压折比及裂缝指数是本论文主要的考察指标。本论文主要研究了砂、水泥、灰钙粉、双飞粉、聚丙烯纤维、胶粉、纤维素醚、木质纤维、膨胀剂对砂浆性能的影响,研究结果如下:(1),特细砂,1:3 的灰砂比。(2)配制抗裂砂浆不宜掺灰钙粉和双飞粉。(3)聚丙烯纤维对砂浆的施工和易性有不利的影响,但能够显著改善砂浆的韧性和抗裂性。(4)胶粉可以改善砂浆的韧性,提高砂浆枯结强度。(5)纤维素醚具有保水增稠作用和引气作用,能够改善砂浆的柔韧性。(6)木质纤维具有一定的柔韧性,能够改善砂浆的组织结构,使砂浆成为具有一定韧性的结构体。(7)膨胀剂能够有效地抑制砂浆的收缩。通过影响胶粉聚苯颗粒外墙外保温系统抗裂防护层性能的系列因素分析,配制出了施工和易性好、粘结强度高、抗开裂能力强的干拌抗裂砂浆,其性能指标满足JCl58-2004《胶粉聚苯颗粒外墙外保温系统》标准要求。关键词:干拌砂浆,特细砂,外加剂,抗裂性重庆大学硕士学位论文英文摘要 ABSTRACT Mortar is used largely as a kind of building material in thearchitedR砌 traditionalmortar isalways mixed inthe construction exists inmany defects,for putation is urate,mixing up is is not easy tocontrol workability ofmortar,and itisdifficult to ensure quality. Moreover,it pollutes environment,it is not efficient and itishard tomeet thespecial request ofdifferentparts -mixed mortar has 80many merits Witll stablequality,hi曲work efficiency,good quality,full variety,good construction performance,convenient use etc,now itisenergetically spread and used. On theother have crack and leakage afterthe new type wallmaterial is asortofmortar wim anti—crackperformance isurgently baSed on, thepaperemphasizes on studying theanti—crackofdry-mixed mortal'. There is extra finesand mortar thatits finedegree modulus islessthan Chongqing,therefore,the extra fmesand mortar ispossessed ofbeyond 95%inproject. The extra finesandmortar has greatshrinkage,low toughness,and itiseasy tocrack, 80thepaper focuses on shrinkage ratio,crack indexand mainly studies sand, cement, ash calcium powder,dual night powder,polypropylene 丘b% redispersi