文档介绍：摘要当前,建筑物渗漏和路面裂缝是工程技术人员亟待解决的难题。由于我国传统建材产业相对落后,材料性能不佳,且工程构筑物常常承受过载作用,导致建筑完工不久即出现开裂现象,促使工程结构进一步破坏。因此,本文从这一问题出发,采用聚合物对传统砂浆进行改性,提高砂浆的强度和韧性等性能,以期达到修补建筑物渗漏和公路路面裂缝的目的,对发展新型聚合物改性砂浆提供技术基础,以拓宽聚合物在工程上的应用范畴。本文以聚合物为主导因素对水泥砂浆的性能进行研究,并运用扫描电子显微镜(SEM)微观测试方法对三种聚合物对水泥砂浆的改性机理进行了分析。研究的内容主要包括:通过改变聚合物的种类和掺量并对混合料采用不同的搅拌方式和养护条件来研究内外因素对砂浆性能的影响;对新拌砂浆的物理性能和硬化后砂浆的力学性能进行研究;采用扫描电镜测试技术分析聚合物改性水泥砂浆的微观结构,分析聚合物的加入对水泥砂浆的改性机理。研究结果表明聚合物对水泥砂浆具有良好的改性效果。随着聚合物掺量的增加, 水泥砂浆逐渐向一种柔性材料发展,强度也不断提高;聚合物乳液能够明显改善新拌砂浆的工作性能;SEM微观分析显示:聚合物乳液在水泥中能够充分成膜,形成不完全连续的、密实的空间网结构,使得结构更加致密。关键词:聚合物;砂浆;力学性能;微观结构 Abstract Currently,the problems ofbuildingleakage andpavement cracks are urgently tobe solved by ofrelatively backward ofChina'straditionalbuilding materialsindustry,poorperformance of materialandoverload,crackphenomena appears on engineering structure furtherdamage isprompted on engineering ofthisproblem,polymer isused tomodify traditional mortarandimprove itsproperties ofstrength andtoughness,in ordertoattain thepurpose of repairingbuilding leakage this new polymer modified mortarisdeveloped andpolymer inengineeringapplication category isbroadened. Forpolymer as aleading factor,theproperties ofcement mortar are studied inthis modification mechanics of threekindsofpolymers modified cement mortarare respectively analyzed by microscopic test method ofscanning electron microscopy (SEM).Themainly research contents ale asfollows:The influenceofexternaland internal factors on theperformance ofthemortal"isstudiedbychanging thetype anddosage of polymer and using differentmode ofagitation andmaintenanceconditions;The physical properties ofnewly agitated mortarand themechanics properties of sclerosismortar ale studied;The microscopic structures ofpolymer modified cement mortararetestedby SEM inordertoanalysis itsmodificationmechanism. The resultsof thestudy indicatethatpolymer hasgood modification effecttocement theincreasedosage ofpolymer d