增韌水性環氧聚合物水泥砂漿的應用
發布時間:2014-08-09
隨著建築業的發展,聚合物水泥體係的材料越來越多地被
混凝土結構工程特殊部位作為功能性材料使用。例如
屋麵防水工程、
混凝土結構工程的破損維修、
地下防水工程背水麵的
滲漏治理及維修、外牆外保溫覆麵及粘接材料等特殊工程部位中發揮了重要的作用。根據不同微觀結構構型的聚合物水泥材料的使用情況,目前己製定了JC/T894―2001聚合物水泥
防水塗料的行業標準,JC/T984―2005juhewushuinifangshuishajiangdexingyebiaozhun。suiranzhexiebiaozhunzhongmouxiezhibiaoqianhelixing,danduikongzhicileicailiaodezhiliangqidaoleyidingdezhiyuezuoyong。zhelianggebiaozhunsuoguidingdejuhewushuiniqishicongcailiaoweiguanjiegougouxingshangjiangshiyouhendaqubiede。qiansulianzhuanjiadeyanjiuzhichu,juhewushuinitixizhong,dangxuandinglemouleijuhewuhou,qitixidejuhewuyushuinidetijibishijuedingfuhecailiaoweiguanjiegoudeguanjiansuozai。juhewushuiniyinghuati,anzhaojuhuidetijibikexingchengliangleihaidaoshijiegougouxingdecailiao,yileishijuhewuxingchenglejiegoulianxuxiangdehaixiang,shuinidecailiaoxingchengjiegoufensanxiangdedaoxiang;另一類是水泥材料形成了結構連續相的海相,聚合物形成分散相的島相。下圖為結構示意圖。
I型海島結構 Ⅱ型海島結構
聚合物水泥的微觀結構示意圖
在JC/T894―2001所規定的聚合物水泥
防水塗料其(qi)微(wei)觀(guan)結(jie)構(gou)構(gou)型(xing)是(shi)聚(ju)合(he)物(wu)為(wei)連(lian)續(xu)相(xiang),水(shui)泥(ni)質(zhi)材(cai)料(liao)為(wei)分(fen)散(san)相(xiang)。這(zhe)類(lei)材(cai)料(liao)聚(ju)合(he)物(wu)為(wei)連(lian)續(xu)相(xiang),所(suo)以(yi)它(ta)有(you)一(yi)定(ding)的(de)延(yan)伸(shen)性(xing)能(neng),隨(sui)著(zhe)延(yan)伸(shen)率(lv)的(de)減(jian)少(shao),抗(kang)張(zhang)拉(la)的(de)強(qiang)度(du)能(neng)力(li)在(zai)提(ti)高(gao),這(zhe)類(lei)材(cai)料(liao)最(zui)大(da)的(de)優(you)點(dian)是(shi)在(zai)潮(chao)濕(shi)環(huan)境(jing)中(zhong)成(cheng)膜(mo)較(jiao)快(kuai),與(yu)砂(sha)漿(jiang)與(yu)混(hun)凝(ning)土(tu)基(ji)層(ceng)粘(zhan)接(jie)良(liang)好(hao),具(ju)有(you)一(yi)定(ding)的(de)透(tou)氣(qi)性(xing)。是(shi)幹(gan)濕(shi)交(jiao)替(ti)環(huan)境(jing)下(xia)可(ke)采(cai)用(yong)的(de)
防水材料,但(dan)是(shi)長(chang)期(qi)浸(jin)水(shui)環(huan)境(jing)下(xia)不(bu)宜(yi)采(cai)用(yong)。這(zhe)類(lei)材(cai)料(liao)由(you)於(yu)產(chan)品(pin)可(ke)以(yi)做(zuo)到(dao)高(gao)度(du)商(shang)品(pin)化(hua),一(yi)般(ban)情(qing)況(kuang)下(xia)多(duo)數(shu)產(chan)品(pin)都(dou)能(neng)達(da)到(dao)行(xing)業(ye)標(biao)準(zhun)規(gui)定(ding)的(de)技(ji)術(shu)指(zhi)標(biao)。這(zhe)類(lei)塗(tu)料(liao)從(cong)技(ji)術(shu)角(jiao)度(du)上(shang)講(jiang)不(bu)應(ying)命(ming)名(ming)為(wei)聚(ju)合(he)物(wu)水(shui)泥(ni),應(ying)命(ming)名(ming)為(wei)水(shui)泥(ni)聚(ju)合(he)物(wu)塗(tu)料(liao)。JC/T984―2005biaozhunsuoguidingdejuhewushuinishajiangyingshiweiguanjiegoushishuiniweilianxuxiang,juhewuweifensanxiangdefuhecailiao,tabunengyanshen,erqiezaiyinghuaguochengzhongyouyidingdetijishousuo,juyouyidingderenxingbiaoxianweikangla、抗折強度提高,具有良好的粘接性能,良好的防水、抗滲性能,它非常有別於JC/T894中的兩型材料,除了具有塗料類材料的優點外,它可在長期浸水的環境下做防水、抗滲材料使用。
水泥為連續相的聚合物水泥硬化體,由於它具有可在潮濕基麵上直接施工,可在潮濕環境下成型,可與砂漿、tongjicengxianjielaogu,keyizaichangqijinshuihuanjingxiachangqishiyong,beizuoweigongnengxingcailiaozaijianzhugongchengdehenduobuweishiyong。yingxiangzheleichanpinshiyongdezuidabiduanshi,shangpinhuade
防水膠需現場配細骨料和地域性的水泥材料,易出現下列問題:①同標號水泥與
防水膠的配伍性有很大區別;②細骨料砂的粒徑、粒徑級配、含泥量有很大差別;③現xian場chang加jia水shui,很hen難nan控kong製zhi均jun一yi的de水shui灰hui比bi,這zhe幾ji點dian就jiu造zao成cheng了le砂sha漿jiang的de技ji術shu性xing能neng不bu均jun一yi,不bu均jun一yi的de砂sha漿jiang直zhi接jie影ying響xiang著zhe硬ying化hua體ti的de各ge種zhong性xing能neng,例li如ru每mei一yi盤pan人ren工gong拌ban合he的de砂sha漿jiang強qiang度du都dou不bu均jun一yi,施shi做zuo
防水層後,易出現應力集中現象,在非分格範圍內也會出現裂縫;砂漿的強度不均一,其防水抗滲能力也不均一。由於這些問題的存在影響了這類產品的應用。
youyuzheleichanpinchuxiandeshangshuwenti,shichangshangyouxuduogangxingshajiangdedanzufenfenzhuangdefentichanpinshangshi,zheleichanpindejuhewuyouyushifenti,takeyijuhewufenti、水泥、細骨料、助劑為原料,生產出現場加水的比較高度商品化的產品,此類產品性能比單純用
防水膠suopeichengdejuhewushuinishajiangxingnengjunyihuachengdutigao。zhegetixichulejuyoushangshumingxianyoudianwai,juyoubushaoquexian,fentijuhewushiyoujuhewuhechengruyedeyuanyetongguozaolichengfende,chulewanquanrongjiezaishuilideshuirongxingjuhewufentiwai,ruyezaofenleidefenzhuangjuhewu,muqiandoubunenghenhaodijiashuizaihaiyuanchengyuanruyedexingneng,jiashuihaiyuanchengmohoumocengdejixielixuexingnengdafuduxiajiang。bujinruci,duijuhewushuinishajiangeryan,xiangtongchanliangdejuhewu,fentijuhewubiyetaideruyeyaogui1~1.5bei,duiyujiagediliandedanzufenfentijuhewushuinishajianglaijiang,qijuhewudechanliangshihenshaode。duiyugangrenxingjuhewushuinishajiang,juhewubixubaozhengyouyidingchanliang,fouzejiubunengchengdeshangshijuhewugaixingshuini,zaixiaochanliangxiasuikechengweijuhewushuini,shizhishangjixielixuexingnenggenbenwugaijin,meiyoukangzhe、kanglaqiangdujueduizhidetigao,congyangeyiyishangjiang,zheleicailiaoyinruleshaoliangfentijuhewu,zhigeiyinghuatizengjialeyixiejixingjituan,chongqiliangzhishigaishanleyixieshuiniyinghuatidezhanjiexingneng,fangshuikangshennenglihejixielixuexingnengdetigaotanbushang,zuoweifangshui、kangshencailiaoshiyongxushenzhong。zheleicailiaozaiguowaijiaodaliangshiyongshizuoweishimiancailiaodezhanjiecailiao,yifangbianbaixingzijidongshouzhuangxiufangwu,haiyoufenmenleidefentidanzufenchanpin,shiweifangbianbaixingzijidongshougaifangzixuanyongdecailiao。
鑒jian於yu剛gang韌ren性xing聚ju合he物wu水shui泥ni防fang水shui砂sha漿jiang在zai某mou些xie工gong程cheng部bu位wei有you特te殊shu的de意yi義yi,提ti高gao改gai進jin這zhe一yi類lei材cai料liao的de綜zong合he性xing能neng,使shi該gai產chan品pin能neng在zai市shi場chang可ke接jie受shou的de價jia格ge下xia,高gao度du商shang品pin化hua,產chan品pin性xing能neng均jun一yi,施shi工gong方fang便bian易yi行xing,防fang水shui可ke靠kao耐nai久jiu,是shi改gai進jin這zhe一yi類lei材cai料liao的de目mu的de。
環氧樹脂是一類具有良好防腐、防水性能、youyizhanjiexingnengdecailiao,danyouyushuzhijiaocui,nanyiyongcigaijincuixingdeshuinizhicailiao,tongguoshiliangdezengrenshuzhigaijinhuanyangshuzhidecuixing,shiqizaibushishangshuyouyixingnengdejichushang,juyourenxing,shizheleicailiaochengweijuyouqimixingyouyoushuimixing,jixielixuexingnenghezhanjiexingnengyouyidecailiao,shiqizai
建築防水lingyuzhongfahuizuoyong。gangrenxingjuhewushuinicailiao,jiarujuhewudemude,budandanshitigaozhanjiexingneng,zhuyaoshiyaogaishanshuinizhicailiaodecuixing,caishiwomendezuizhongmude。tongguoduizengrencailiaodezhonglei、摻入量的選擇,水性環氧聚合物水泥砂漿各項性能均優於其他類別的材料,表1為不同類型聚合物水泥砂漿機械力學性能的對照表。
不同類型砂漿的性能對比表 表1
類 別
抗壓強度(Mpa)
28d
抗折強度
28d
折/壓比
28d
體積收縮率
28d
普通1:2.5水泥砂漿
29
4.6
0.15
0.81%
1:2.5聚合物水泥砂漿
28
6.0
0.22
0.21%
增韌水性環氧聚合物水泥砂漿
7d
7d
7d
0.10%
33
9.6
0.34
通(tong)過(guo)增(zeng)韌(ren)劑(ji)的(de)選(xuan)擇(ze),增(zeng)韌(ren)水(shui)性(xing)環(huan)氧(yang)聚(ju)合(he)物(wu)水(shui)泥(ni)砂(sha)漿(jiang)體(ti)係(xi),不(bu)僅(jin)硬(ying)化(hua)體(ti)的(de)抗(kang)壓(ya)強(qiang)度(du)無(wu)降(jiang)低(di),而(er)且(qie)抗(kang)折(zhe)強(qiang)度(du)增(zeng)幅(fu)很(hen)大(da),體(ti)積(ji)收(shou)縮(suo)率(lv)比(bi)普(pu)通(tong)砂(sha)漿(jiang)體(ti)係(xi)減(jian)小(xiao)8倍,比一般聚合物水泥砂漿減少1倍(bei),體(ti)積(ji)穩(wen)定(ding)性(xing)和(he)抗(kang)折(zhe)強(qiang)度(du)的(de)大(da)幅(fu)度(du)提(ti)高(gao),說(shuo)明(ming)增(zeng)韌(ren)劑(ji)起(qi)到(dao)了(le)改(gai)善(shan)環(huan)氧(yang)樹(shu)脂(zhi)性(xing)能(neng)的(de)作(zuo)用(yong),同(tong)時(shi)也(ye)賦(fu)予(yu)了(le)聚(ju)合(he)物(wu)水(shui)泥(ni)硬(ying)化(hua)體(ti)優(you)異(yi)的(de)機(ji)械(xie)力(li)學(xue)性(xing)能(neng)和(he)體(ti)積(ji)穩(wen)定(ding)性(xing)。通(tong)過(guo)工(gong)程(cheng)實(shi)踐(jian)和(he)對(dui)材(cai)料(liao)的(de)不(bu)斷(duan)改(gai)進(jin),該(gai)材(cai)料(liao)呈(cheng)現(xian)了(le)良(liang)好(hao)的(de)綜(zong)合(he)性(xing)能(neng),其(qi)它(ta)性(xing)能(neng)對(dui)比(bi)見(jian)表(biao)2:
不同類別砂漿性能對比表 表2
類別
粘接性28d(Mpa)
8字模法
抗滲性
普通1:2.5水泥砂漿
0.3
28d 0.4~0.6Mpa水壓下,4公分模塊,水透過
1:2.5聚合物水泥砂漿
0.6
28d 1.0Mpa水壓下透水深度,4公分模塊,透水2~3cm
增韌水性環氧聚合物水泥砂漿
1.8
7d 1.5Mpa水壓下,3mm塗層,透水深度0.5mm
通過對
混凝土結構維修工程和新、舊
地下防水工程的施工,說明了此體係材料在價格和性能上比其他類別的材料具有明顯的優越性,其塗刮層可塗抹2~3毫米,防水抗滲能力可達到2公分厚普通聚合物水泥砂漿的能力,在室外施做2~3毫米的塗層無需養護。砂漿施工後1天即具有一定的抗滲能力。其優點如下:
①高度商品化的三組分產品,產品性能均一。 ′
②具有優異的粘接性能,比一般砂漿體係高4~6倍。
③優異的力學性能,良好的抗折、抗拉性能,薄層施工可在較大範圍內不設分格縫。
④優良的防水抗滲性,可在長期浸水環境下使用。
⑤良好的水密性和氣密性。
⑥施工簡便易行,施工刮抹層的質量易保證。