陜西瀝青混凝土路面施工壓實及成型:
1.壓實(shi)層(ceng)(ceng)的較大厚度(du)不應(ying)大于100毫米,每層(ceng)(ceng)應(ying)滿足密實(shi)度(du)和(he)平整(zheng)度(du)的要求。
2.瀝(li)青路面施工應配備足夠的(de)完好(hao)壓(ya)路機,選(xuan)擇合理的(de)壓(ya)路機組合,并根據攤鋪后(hou)瀝(li)青混合料的(de)溫(wen)度,嚴格(ge)控制初壓(ya)、復壓(ya)和終(zhong)壓(ya)(包括成型)的(de)時機。
3.碾(nian)(nian)壓速度應緩慢而均勻(yun),并應符合壓路機(ji)碾(nian)(nian)壓速度規范(fan)的(de)要求(km/h)
4.壓(ya)(ya)路機碾壓(ya)(ya)溫(wen)度應根據瀝青(qing)及瀝青(qing)混(hun)合料類型、壓(ya)(ya)路機、氣溫(wen)、層厚等因素,通過壓(ya)(ya)力試驗確定。
5.攤鋪(pu)機后應立即進行初壓,靜壓1 ~ 2次用鋼輥。碾壓時(shi),壓路機的驅動(dong)輪應朝向(xiang)攤鋪(pu)機,從(cong)外側向(xiang)中心(xin)碾壓,在(zai)超高路段和坡道上從(cong)下(xia)部(bu)向(xiang)上部(bu)碾壓。
6.初壓(ya)(ya)(ya)(ya)后應(ying)(ying)(ying)立(li)即開始(shi)復壓(ya)(ya)(ya)(ya),不(bu)(bu)(bu)得隨意(yi)停止。碾(nian)壓(ya)(ya)(ya)(ya)路(lu)段總長(chang)度不(bu)(bu)(bu)得超過(guo)80米(mi)。密實級配瀝青混(hun)合(he)料的再(zai)壓(ya)(ya)(ya)(ya)實應(ying)(ying)(ying)優先(xian)選(xuan)用(yong)(yong)重(zhong)型輪(lun)(lun)(lun)胎壓(ya)(ya)(ya)(ya)路(lu)機,以增加水密性(xing),其總質(zhi)量不(bu)(bu)(bu)應(ying)(ying)(ying)小(xiao)于25t。相(xiang)鄰(lin)的滾動帶(dai)應(ying)(ying)(ying)重(zhong)疊(die)1/3 ~ 1/2輪(lun)(lun)(lun)寬。對于粗骨料基(ji)混(hun)合(he)料,宜采用(yong)(yong)振動壓(ya)(ya)(ya)(ya)路(lu)機進(jin)行(xing)再(zai)壓(ya)(ya)(ya)(ya)縮(厚度應(ying)(ying)(ying)大(da)于30毫(hao)米(mi)),振動頻率為(wei)35 ~ 50赫茲(zi),振幅(fu)(fu)為(wei)0.3 ~ 0.8毫(hao)米(mi)。當層(ceng)厚較(jiao)(jiao)大(da)時(shi),應(ying)(ying)(ying)采用(yong)(yong)高頻大(da)振幅(fu)(fu),當層(ceng)厚較(jiao)(jiao)薄時(shi),應(ying)(ying)(ying)采用(yong)(yong)低(di)振幅(fu)(fu),以防(fang)止骨料破(po)碎(sui)。相(xiang)鄰(lin)的軋制帶(dai)應(ying)(ying)(ying)重(zhong)疊(die)100 ~ 200毫(hao)米(mi)。使(shi)用(yong)(yong)三輪(lun)(lun)(lun)鋼輪(lun)(lun)(lun)壓(ya)(ya)(ya)(ya)路(lu)機時(shi),總質(zhi)量不(bu)(bu)(bu)得小(xiao)于12t,相(xiang)鄰(lin)的碾(nian)壓(ya)(ya)(ya)(ya)帶(dai)應(ying)(ying)(ying)與后輪(lun)(lun)(lun)寬度重(zhong)疊(die)1/2,不(bu)(bu)(bu)小(xiao)于200mm。