耐候试验对玻化微珠保温砂浆外保温系统黏结强度的影响.pdf

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1、2016年第6期(总第320期)Number6in2016(TotalNo．320)混凝土Concrete预拌砂浆READYMⅨEDMORTARdoi：10．3969(j．issn．1002—3550．2016．06．025耐候试验对玻化微珠保温砂浆外保温系统黏结强度的影响王诗萌1，牛志荣2，熊厚仁2，李珠1。刘元珍，(1．太原理工大学建筑与土木工程学院，山西太原030024；2．嘉兴学院建筑工程学院，浙江嘉兴314001)摘要：随着我国建筑节能的发展，安全、绿色、经济的玻化微珠无机保温砂浆在外保温系统中的应用迅速增加，其性能研究已备受关注。为填补其在耐候性领域的研究

2、空白，本试验通过对6组共30个试样进行轴向拉拔试验，测试玻化微珠外保温涂料系统在耐候试验不同循环次数下的系统拉伸黏结强度和抹面层与保温层拉伸黏结强度，得到黏结强度变化规律，揭示黏结强度损伤机理。结果表明：随着耐候试验循环次数的增加，黏结强度逐步降低；热冷循环比热雨循环对黏结强度的影响更大；系统的黏结强度始终低于抹面层与保温层的黏结强度，二者最终强度均大于0．1MPa，满足规范要求。关键词：玻化微珠保温砂浆；外墙外保温系统；耐候性；拉伸黏结强度；损伤机理中图分类号：TU528．01文献标志码：A文章编号：1002—3550(2016)06—0092—05Effectof

3、weatheringtestonbondingstrengthofglazedhollowbeadsthermalinsulationmortarexternalthermalinsulationcompositesystemWANGShimengt,NIUZhiron92,XIONGHouren2,LIZhul．L彤Yuanzhenl(1．CollegeofArchitectureandCivilEngineering，TaiyuanUniversityofTechnology，Taiyuan030024，China；2．CollegeofEngineeringan

4、dArchitecture，JiaxingUniversity，Jiaxing314001，China)Abstract：Theapplicationofglazedhollowbeadsthermalinsulationmortar(GHBTIM)intheexternalthermalinsulationcompositesystem(ETICS)，asanenergyefficientandincombustibleinorganicmaterial，israpidlyincreasing．TheperformanceofGHBTIMhasre—ceivedex

5、tensiveattention．Tosupplementtheresearchinthisareaourstudyanalyzes30specimensin6groups．Afterundergoingdifferentweatheringtestcycles，pull-offtestsofthesamplesweredonetomeasuretheirbondstrengthoftheETICSaswellasbetweentherender-ingsystemandinsulationlayer．Thechangeruleofbondstrengthwasobt

6、ainedandthedamageevolutionmechanismofbondstrengthwasrevealed．TheresultsshowthatthebondstrengthofglazedhollowbeadsthermalinsulationmortarETICSgraduallydecreaseswiththein·creasingofcycles．Thedegradationofbondstrengthismoresusceptibleintheheating—coolingcyclethanheating-rainningcycle．Thebo

7、ndstrengthoftheETICSislowerthanthatbetweentherenderingsystemandinsulationlayerduringtheentireweatheringtest，andthebondstrengthofbothishigherthanO．1MPawhichisrequiredbythestandard．Keywords：glazedhollowthermalinsulationmortar；extemalthermalinsulationcompositesystem；weatheringtest