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。
玻bo纖xian土tu工gong格ge柵zha在zai瀝li青qing麵mian層ceng中zhong,能neng夠gou將jiang上shang述shu的de壓ya應ying力li與yu拉la應ying力li分fen散san,在zai兩liang塊kuai受shou力li區qu域yu之zhi間jian形xing成cheng緩huan衝chong帶dai,減jian少shao了le應ying力li突tu變bian對dui瀝li青qing麵mian層ceng的de破po壞huai。同tong時shi玻bo璃li纖xian維wei土tu工gong格ge柵zha的de低di延yan伸shen率lv減jian少shao了le路lu麵mian的de彎wan沉chen量liang,保bao證zheng了le路lu麵mian不bu會hui發fa生sheng過guo度du變bian形xing。
(2) 耐高溫車轍
liqinghunningtuzaigaowenshijuyouliubianxing,zaichelianghezaizuoyongxia,shouliquyuchanshengaoxian,chelianghezaichechuhou,liqingmiancengwufawanquanhuifuyuanzhuangtai,jichanshenglesuxingbianxing,zaicheliangfanfunianyadezuoyongxia,suxingbianxingbuduanjilei,xingchengchezhe。tongguoliqingmiancengjiegoufenxikezhi,gaowenxiadeliqinghunningtuzaishoudaohezaidenianyazuoyong,xingchengleweiliangdeboxingliubian,miancengzhongmeiyourenhekeyiyueshuliqinghunningtuliubiandegujiacailiao,zaochengliqingmiancengliubiandeleijidiejia,zheshixingchengchezhedegenbensuozai。
在(zai)瀝(li)青(qing)麵(mian)層(ceng)中(zhong)使(shi)用(yong)玻(bo)纖(xian)土(tu)工(gong)格(ge)柵(zha),其(qi)在(zai)瀝(li)青(qing)麵(mian)層(ceng)中(zhong)起(qi)到(dao)骨(gu)架(jia)作(zuo)用(yong),瀝(li)青(qing)砼(tong)中(zhong)集(ji)料(liao)貫(guan)穿(chuan)於(yu)格(ge)柵(zha)間(jian),形(xing)成(cheng)複(fu)合(he)力(li)學(xue)嵌(qian)鎖(suo)體(ti)係(xi),限(xian)製(zhi)集(ji)料(liao)運(yun)動(dong),增(zeng)加(jia)了(le)瀝(li)青(qing)麵(mian)層(ceng)中(zhong)的(de)橫(heng)向(xiang)約(yue)束(shu)力(li),瀝(li)青(qing)麵(mian)層(ceng)中(zhong)各(ge)部(bu)分(fen)彼(bi)此(ci)牽(qian)製(zhi),防(fang)止(zhi)了(le)瀝(li)青(qing)麵(mian)層(ceng)的(de)推(tui)移(yi),從(cong)而(er)起(qi)到(dao)抵(di)抗(kang)車(che)轍(zhe)的(de)作(zuo)用(yong)。
(3) 抗低溫縮裂
yanhanshiqi,liqinghunningtumiancengdewendujinyuqiwen,liqingtongyulengshousuo,chanshenglayingli,zaishoudaohezaifanfuzuoyongxia,layinglijinyibuzengjia,danglayinglichaoguoliqingtonglashenqiangdushi,chanshengliewen,zailiewenliangduanchu,layingligengjiajizhong,liewenzhubuxingchengliefeng,zaochengbinghai。
玻(bo)纖(xian)土(tu)工(gong)格(ge)柵(zha)置(zhi)於(yu)瀝(li)青(qing)中(zhong),使(shi)得(de)瀝(li)青(qing)砼(tong)的(de)拉(la)伸(shen)強(qiang)度(du)大(da)大(da)提(ti)高(gao),足(zu)夠(gou)抵(di)抗(kang)住(zhu)較(jiao)大(da)的(de)拉(la)應(ying)力(li)而(er)不(bu)致(zhi)發(fa)生(sheng)路(lu)麵(mian)破(po)壞(huai),即(ji)使(shi)因(yin)為(wei)局(ju)部(bu)區(qu)域(yu)產(chan)生(sheng)微(wei)小(xiao)裂(lie)紋(wen),裂(lie)紋(wen)處(chu)的(de)應(ying)力(li)集(ji)中(zhong),經(jing)玻(bo)纖(xian)土(tu)工(gong)格(ge)柵(zha)的(de)傳(chuan)遞(di)而(er)消(xiao)失(shi),裂(lie)紋(wen)不(bu)會(hui)發(fa)展(zhan)成(cheng)裂(lie)縫(feng)。
(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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