反fan射she裂lie縫feng是shi瀝li青qing路lu麵mian普pu遍bian存cun在zai的de一yi種zhong病bing害hai現xian象xiang。根gen據ju國guo內nei外wai道dao路lu工gong程cheng的de實shi踐jian,在zai瀝li青qing麵mian層ceng和he中zhong集ji瀝li青qing混hun合he料liao層ceng或huo粗cu集ji瀝li青qing混hun合he料liao層ceng之zhi間jian鋪pu設she一yi層ceng土tu工gong織zhi物wu,可ke用yong以yi消xiao除chu或huo減jian緩huan麵mian層ceng反fan射she裂lie縫feng的de產chan生sheng,從cong而er延yan長chang道dao路lu的de使shi用yong壽shou命ming,降jiang低di維wei修xiu成cheng本ben。但dan是shi,由you於yu瀝li青qing路lu麵mian澆jiao注zhu時shi的de溫wen度du高gao達da160℃-180℃,致使土工織物褶皺、變形、ruanhua,shiqixingnengdadajiangdi,budannanyixiaochuhuojianhuanmiancengfansheliefengdechansheng,erqieshideliqinglumiangengjiaaotubuping,erboxiantugonggezhasuoteyoudexingneng,wanquanmanzuliqinglumiandeyaoqiu,muqianxuduogongchengyishiyongboxiantugonggezha。
玻纖應用於瀝青道路時,可在以下幾方麵發揮作用。
(1)抗疲勞開裂
瀝(li)青(qing)路(lu)麵(mian)必(bi)須(xu)具(ju)有(you)一(yi)定(ding)的(de)承(cheng)載(zai)能(neng)力(li),在(zai)規(gui)定(ding)的(de)時(shi)間(jian)內(nei)不(bu)能(neng)發(fa)生(sheng)疲(pi)勞(lao)破(po)壞(huai)。瀝(li)青(qing)路(lu)麵(mian)在(zai)直(zhi)接(jie)與(yu)車(che)輪(lun)接(jie)觸(chu)的(de)下(xia)麵(mian)層(ceng)受(shou)到(dao)壓(ya)力(li),在(zai)輪(lun)載(zai)邊(bian)緣(yuan)以(yi)外(wai)的(de)區(qu)域(yu),麵(mian)層(ceng)受(shou)到(dao)拉(la)力(li)作(zuo)用(yong),由(you)於(yu)兩(liang)處(chu)受(shou)力(li)區(qu)域(yu)所(suo)受(shou)力(li)性(xing)質(zhi)不(bu)同(tong),而(er)又(you)彼(bi)此(ci)緊(jin)靠(kao),因(yin)此(ci)在(zai)兩(liang)塊(kuai)受(shou)力(li)區(qu)域(yu)的(de)交(jiao)界(jie)處(chu)即(ji)力(li)的(de)突(tu)變(bian)處(chu)發(fa)生(sheng)破(po)壞(huai),在(zai)長(chang)期(qi)荷(he)載(zai)的(de)作(zuo)用(yong)下(xia),發(fa)生(sheng)疲(pi)勞(lao)開(kai)裂(lie)。
boxiantugonggezhazailiqingmiancengzhong,nenggoujiangshangshudeyayingliyulayinglifensan,zailiangkuaishouliquyuzhijianxingchenghuanchongdai,jianshaoleyinglitubianduiliqingmiancengdepohuai。tongshibolixianweitugonggezhadediyanshenlvjianshaolelumiandewanchenliang,baozhenglelumianbuhuifashengguodubianxing。
(2) 耐高溫車轍
瀝li青qing混hun凝ning土tu在zai高gao溫wen時shi具ju有you流liu變bian性xing,在zai車che輛liang荷he載zai作zuo用yong下xia,受shou力li區qu域yu產chan生sheng凹ao陷xian,車che輛liang荷he載zai撤che除chu後hou,瀝li青qing麵mian層ceng無wu法fa完wan全quan恢hui複fu原yuan狀zhuang態tai,即ji產chan生sheng了le塑su性xing變bian形xing,在zai車che輛liang反fan複fu碾nian壓ya的de作zuo用yong下xia,塑su性xing變bian形xing不bu斷duan積ji累lei,形xing成cheng車che轍zhe。通tong過guo瀝li青qing麵mian層ceng結jie構gou分fen析xi可ke知zhi,高gao溫wen下xia的de瀝li青qing混hun凝ning土tu在zai受shou到dao荷he載zai的de碾nian壓ya作zuo用yong,形xing成cheng了le微wei量liang的de波bo形xing流liu變bian,麵mian層ceng中zhong沒mei有you任ren何he可ke以yi約yue束shu瀝li青qing混hun凝ning土tu流liu變bian的de骨gu架jia材cai料liao,造zao成cheng瀝li青qing麵mian層ceng流liu變bian的de累lei積ji疊die加jia,這zhe是shi形xing成cheng車che轍zhe的de根gen本ben所suo在zai。
zailiqingmiancengzhongshiyongboxiantugonggezha,qizailiqingmiancengzhongqidaogujiazuoyong,liqingtongzhongjiliaoguanchuanyugezhajian,xingchengfuhelixueqiansuotixi,xianzhijiliaoyundong,zengjialeliqingmiancengzhongdehengxiangyueshuli,liqingmiancengzhonggebufenbiciqianzhi,fangzhileliqingmiancengdetuiyi,congerqidaodikangchezhedezuoyong。
(3) 抗低溫縮裂
嚴yan寒han時shi期qi,瀝li青qing混hun凝ning土tu麵mian層ceng的de溫wen度du近jin於yu氣qi溫wen,瀝li青qing砼tong遇yu冷leng收shou縮suo,產chan生sheng拉la應ying力li,在zai受shou到dao荷he載zai反fan複fu作zuo用yong下xia,拉la應ying力li進jin一yi步bu增zeng加jia,當dang拉la應ying力li超chao過guo瀝li青qing砼tong拉la伸shen強qiang度du時shi,產chan生sheng裂lie紋wen,在zai裂lie紋wen兩liang端duan處chu,拉la應ying力li更geng加jia集ji中zhong,裂lie紋wen逐zhu步bu形xing成cheng裂lie縫feng,造zao成cheng病bing害hai。
boxiantugonggezhazhiyuliqingzhong,shideliqingtongdelashenqiangdudadatigao,zugoudikangzhujiaodadelayinglierbuzhifashenglumianpohuai,jishiyinweijubuquyuchanshengweixiaoliewen,liewenchudeyinglijizhong,jingboxiantugonggezhadechuandierxiaoshi,liewenbuhuifazhanchengliefeng。
(4) 延緩反射裂縫
裂(lie)縫(feng)產(chan)生(sheng)的(de)反(fan)射(she)有(you)兩(liang)種(zhong),一(yi)種(zhong)是(shi)麵(mian)層(ceng)產(chan)生(sheng)裂(lie)縫(feng)後(hou),裂(lie)縫(feng)向(xiang)下(xia)反(fan)射(she),破(po)壞(huai)下(xia)層(ceng)結(jie)構(gou),降(jiang)低(di)路(lu)麵(mian)結(jie)構(gou)強(qiang)度(du),在(zai)雨(yu)水(shui)時(shi)節(jie),水(shui)進(jin)入(ru)裂(lie)縫(feng)中(zhong),在(zai)交(jiao)通(tong)荷(he)載(zai)(輪胎壓力)defanfudiya,shuizailiefengzhongchanshengshuiya,shuibuduandechongjiliqinghunheliao,daozhiliefengkuoda。lingyizhongshijiumiancengyuanyouliefeng,lujicenghuoxiacenglujicengchanshengdeliefengxiangshangfanshe,xinzhaolumianwufachengshouyindicengyidongerchanshengdejianqielihekangshenyingli,daozhilumianmiancengliefeng。
在瀝青罩麵層中加鋪玻纖土工格柵夾層,抑製應力,釋放應變,增強瀝青混凝土整體強度,達到防止裂縫向上或向下反射的目的。
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