SBS改性瀝青在上面層路面鋪筑中的應(yīng)用

1、.the principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative char

2、ges and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct Government credi

3、t + business credit credit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service in

4、dustries. To create policy lowlands, Highlands, integrity of service land, development land as the goal, to optimize the area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving proble

5、ms associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify exami

6、nation and approval links, improve efficiency; according to the .Since the educational practice of the mass line of the party, himself seriously in the education, practical control central eight rules and opposing the four winds and practicing three Suns, and check the spirit of Jiao Yulu, ideology,

7、 solicit opinions based on outstanding problems checked swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the partys political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the partys politi

8、cal disciplines. Conscientiously abide by the partys political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the partys political di

9、scipline problems. 2, in the implementation of the central authorities of the eight provisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction

10、, strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs furtherSBS改性瀝青在

11、上面層路面鋪筑中的應(yīng)用 摘要目的：為防止瀝青路面早期破壞；方法：通過室內(nèi)試驗，分別對常規(guī)瀝青、SBS改性瀝青的技術(shù)指標(biāo)進(jìn)行測定，對瀝青混合可高溫抗車轍性能、低溫抗裂性能、凍融劈裂強度試驗進(jìn)行了試驗分析；結(jié)果：試驗結(jié)果表明，SBS改性瀝青混凝土具有優(yōu)良的路用性能；結(jié)論：采用SBS改性瀝青進(jìn)行上面層鋪筑，針對改性瀝青路面的施工特點，制定科學(xué)的施工方案和合理的質(zhì)量控制可以有細(xì)小的控制瀝青路面早期破壞。 關(guān)鍵詞改性瀝青 施工工藝 瀝青路面 抗裂性能 車轍 1、引言 隨著我國經(jīng)濟的發(fā)展，交通量的不斷增長，瀝青路面均出現(xiàn)一定程度的早期破壞。調(diào)查資料顯示，超限運輸、氣候因素、設(shè)計施工方案不當(dāng)?shù)闹T多因素導(dǎo)致瀝

12、青路面出現(xiàn)早期破壞。如何對出現(xiàn)破壞的道路進(jìn)行及時補救，保證道路的使用性能，本文結(jié)合G208國道長治境內(nèi)段（K897+085-K1003+439）路面大修工程進(jìn)行了研究，G208國道（晉中界長治界）公路全長124.354，是山西省重點建設(shè)的省際快速通道打通至長治公路的組成部分，在山西省干線公路網(wǎng)站中占有十分重要的地位。全線采用改性混凝土路面，上面層4細(xì)粒式瀝青碎石，下面層是,6中粒式瀝青碎石。山西省公路沿線雨量較少，夏季平均氣溫高于25，平均日交通量大于2萬輛，其中絕大多數(shù)為重載運煤貨車。為防止瀝青路面出現(xiàn)早期損害，晉中界長治段（K879+085-K1003+439）在設(shè)計施工中采取了一系列技術(shù)

13、措施，其中，通過路面抗滑磨耗層路用性能的研究，在瀝青混合料中采用了SBS改性瀝青，并在施工中采取了科學(xué)的施工工藝和嚴(yán)格的質(zhì)量控制手段，收到了良好的效果。2.原材料的技術(shù)要求2.1瀝青采用優(yōu)質(zhì)SBS改性瀝青。2.2粗集料應(yīng)采用石質(zhì)堅硬、清潔不含風(fēng)華顆粒，近似立方體顆粒的碎石，粒徑大于4.75min，宜采用玄武巖集料。 2.3細(xì)集料，采用堅硬、清潔、干燥、無風(fēng)化、無雜質(zhì)并有適當(dāng)級配的人工扎制玄武巖或石灰?guī)r細(xì)集料。2.4填料宜采用石灰?guī)r堿性石料經(jīng)磨細(xì)得到的礦粉，礦粉必須干燥清潔。2.5抗剝離劑，根據(jù)誰損害性能試驗 決定瀝青上面層是否用抗剝離劑，一般摻加量為瀝青質(zhì)量0.4%.2.6穩(wěn)定劑，采用優(yōu)質(zhì)的木

14、質(zhì)素絮，摻加比例為瀝青混合料總質(zhì)量的0.3%0.4%。 3.室內(nèi)試驗研究3.1瀝青蒸發(fā)殘留物質(zhì)標(biāo)在基質(zhì)瀝青中參加3%、5%的SBS改性劑，進(jìn)行政法殘留瀝青性質(zhì)試驗，包括針入度（25，100g，5s）、5延度、軟化點試驗。按照公路瀝青及瀝青混合料試驗規(guī)程進(jìn)行試驗，結(jié)果見表1. 檢測項目 3%SBS檢測指標(biāo) 5%SBS檢測指標(biāo) 規(guī)范要求 針入度25，100g.5s（0.1mm） 46 44 40 針入度指數(shù) 0.29 0.280.2 延度5/min,5（cm） 38 3420 軟化點（ 71 6760運動粘度135（Pa.s） 1.4 1.2 3 彈性恢復(fù)25/% 77 7570 損失量（%） 0

15、.23 0.271.0 針入度比（25）* 76 7965延度5cm/min.5（cm）* 32 3415表1蒸發(fā)殘留物質(zhì)瀝青性質(zhì)試驗結(jié)果試驗表明：隨著改性劑的加入，瀝青針入度、軟化點、延度制表性能等指標(biāo)均有改善，改性劑不僅可以改善瀝青政法殘留物的高溫穩(wěn)定性，而且對于瀝青蒸發(fā)殘留物的低溫抗裂性能也有較大的改善。3.2瀝青混合料試驗為了確保瀝青混合料具有良好的使用性能和抗滑性能，選用優(yōu)質(zhì)碎石，級配設(shè)計見圖1，以SBS作為改性劑配制兩組瀝青混合料，分別代表基質(zhì)瀝青、5%SBS成型試件進(jìn)行瀝青混合料的濕輪磨耗試驗，車轍試驗和凍融劈裂強度試驗，來綜合評價SBS改性瀝青混合料的路用性能。通過率%篩孔孔徑

16、/mm圖1 瀝青混合料級配曲線4.影響瀝青混合料路用性能的生產(chǎn)因素分析4.1拌和溫度因素改性瀝青混合料攤鋪溫度比基質(zhì)瀝青混合料攤鋪溫度高10-20，故改性瀝青拌和溫度應(yīng)形影提高，同時每車混合料進(jìn)行溫度檢測，溫度過高或者過低的混合料都廢棄。4.2拌和時間因素改性瀝青的粘度比基質(zhì)瀝青高，拌和難度較大，故拌和時間應(yīng)相應(yīng)增加，拌和時間要確保瀝青混合料拌和均勻，瀝青和礦料充分裹覆，確保礦料表面的瀝青膜均勻且要達(dá)到一定的厚度。4.3瀝青混合料的運輸因素瀝青混合料運輸時，無論運距遠(yuǎn)近，都要用油布進(jìn)行覆蓋，覆蓋時綁扎要牢固，防止運輸過程中瀝青混合料溫度過度失效。4.4瀝青混合料的攤鋪機壓實因素采用2臺攤鋪機同

17、向階梯型攤鋪。攤鋪前，要根據(jù)拌和站的產(chǎn)量、運距、最小攤鋪速度（2.0m/min），確定運輸車輛數(shù)量和攤鋪速度。攤鋪過程要均勻、平穩(wěn)、連續(xù)，同時要處理好攤鋪機起步時的橫向縫以確保路面的平整度，嚴(yán)格遵循“從低到高、緊跟慢壓”的原則，碾壓設(shè)備采用3臺雙鋼輪DD-110型振動壓路機。2臺25t膠輪壓路機進(jìn)行階梯形斷面碾壓，其壓實作業(yè)參數(shù)按表3，碾壓時，壓路機速度要均勻，重疊寬度要適中，禁止在熱的瀝青混合料上急?；蚣鞭D(zhuǎn)，并派有專人向輪胎壓路機的輪胎上涂抹植物油，碾壓成型后的瀝青混合料表面應(yīng)平整密實，無輪跡、裂縫和松散等現(xiàn)象。5.SBS改性瀝青路面施工工藝5.1SBS改性瀝青混合料的運輸SBS改性瀝青混合

18、料在運輸過程中，首先應(yīng)保證運力滿足要求，運料車盡量勻速行進(jìn)，避免混合料離析、結(jié)塊或遭雨淋?，F(xiàn)場應(yīng)檢查瀝青混合料的質(zhì)量。根據(jù)拌和料、攤鋪機生產(chǎn)能力及運距計算車輛數(shù)，保證攤鋪機攤鋪時前面常保存有45輛待卸車，運輸車輛采用大噸位運輸車，保證運力滿足要求。運輸車輛的車廂應(yīng)清掃干凈，洗刷油水混合物，嚴(yán)禁有雜物殘留在車廂；為防止瀝青混合料與車廂板粘結(jié)，在車廂側(cè)板和底部涂1：3的柴油水混合液。不管是否刮風(fēng)、下雨，運料車均應(yīng)用完好的雙層蓬布覆蓋設(shè)施。采用數(shù)顯插入式熱電偶溫度計檢測瀝青混合料的出廠和運到現(xiàn)場的溫度，插入深度大于150mm，在運料車側(cè)面中部設(shè)檢測孔，孔口距車廂底面約300mm。在攤鋪現(xiàn)場應(yīng)憑運料單

19、收料，并檢查瀝青混合料的質(zhì)量。如混合料的溫度過高或過低，應(yīng)該廢棄不用，已結(jié)塊或已遭雨淋的混合料也應(yīng)廢棄不用。卸料后，對殘余的混合料應(yīng)及時清除，防止結(jié)硬。5.2SBS改性瀝青混合料的攤鋪攤鋪SBS改性瀝青混合料的過程中，首先要修補、處理下承層，同時為確保上面層與下承層粘結(jié)完好應(yīng)灑布粘層油。攤鋪溫度應(yīng)控制在一定范圍內(nèi)，并且要連續(xù)穩(wěn)定的攤鋪，以確保攤鋪后連續(xù)、平整。攤鋪:攤鋪溫度宜控制在170180之間，不得低于160；攤鋪前，攤鋪機應(yīng)調(diào)整到最佳狀態(tài)。螺旋布料器的料量以略高于其中心為度，避免攤鋪出現(xiàn)離析現(xiàn)象。攤鋪混合料前，應(yīng)預(yù)熱熨板到規(guī)定溫度，初始壓實度不小于85%，攤鋪機熨平板必須拼接緊密，防止卡

20、入料將路面拉出條痕;上面層攤鋪厚度和平整度由平衡梁控制，應(yīng)密切注意平衡梁的粘料情況，發(fā)現(xiàn)粘料時及時清除，防止產(chǎn)生拉痕。攤鋪機行走前，應(yīng)嚴(yán)格按松鋪標(biāo)高用木板將熨平板墊好，確保起始攤鋪厚度滿足要求；連續(xù)穩(wěn)定的攤鋪，是提高路面平整度的最主要措施，攤鋪機的攤鋪速度應(yīng)根據(jù)拌和機的產(chǎn)量、施工機械配套情況及攤鋪厚度按2.5m/min左右予以調(diào)整選擇，做到緩慢、均勻不間斷攤鋪，做到每天收工停機一次；攤鋪過程中應(yīng)隨時檢測調(diào)整松鋪厚度，確保松鋪厚度偏差在03以內(nèi)。目測混合料的質(zhì)量，發(fā)現(xiàn)問題及時報告技術(shù)負(fù)責(zé)人予以處理；注意攤鋪機接斗的操作程序，減少粗集料離析。攤鋪機集料斗應(yīng)在刮板尚未露出，尚有約10厚的熱料時擾料，

21、這是在運料車剛退出時進(jìn)行，而且應(yīng)在料斗兩翼才恢復(fù)原位時，下一輛運料車即開始卸料，做到連續(xù)供料；雨后下承層未充分干前，不得繼續(xù)攤鋪。5.3SBS改性瀝青混合料的壓實SBS改性瀝青混合料的壓實是保證瀝青上面層質(zhì)量的重要原則，應(yīng)注意碾壓的均衡、連續(xù)性，防止出現(xiàn)漏壓等現(xiàn)象。SBS改性瀝青混合料的壓實是保證瀝青上面層質(zhì)量的重要原則，在不出現(xiàn)推移的前題下盡可能早壓，碾壓按“緊跟、慢壓、高頻、低幅”的原則進(jìn)行。路面在冷卻前，車輛機械不得在路面上停放，并防止礦料等落在路面上。5.4改性瀝青混合料的路面接縫攤鋪機橫向接每天都要碰到的，其平接縫的具體做法是：攤鋪機駛離現(xiàn)場，由人工將端部混合料鏟后再予以碾壓，將坡下

22、部分用切割機切掉并清除，縫邊涂刷粘層瀝青。攤鋪機起動前，熨平板要進(jìn)行預(yù)熱，將熨平板放在前鋪的面層上并與切縫邊對齊，下墊木板，攤鋪成松鋪厚度青混合料攤鋪層，用鋼輪壓路機從前鋪的面層上碾壓，每次向新鋪層推進(jìn)1015cm，直至將新鋪層壓密實，再進(jìn)行縱向正常碾壓，檢查接縫平整度是否符合要求。橫向接縫應(yīng)離橋梁伸縮縫20m以外，以確保伸縮縫兩邊路面表面的平順。5.5SBS改性瀝青混合料路面平整度控制措施施工前首先要保證中面層清潔、平整。施工中的平整度控制應(yīng)嚴(yán)格防止混合料產(chǎn)生離析，自卸車在裝料時要按規(guī)定的次數(shù)進(jìn)行移動。改性瀝青混合料儲倉卸料口也不宜距自卸車太高，以免粗集料離析。攤鋪機應(yīng)均勻、連續(xù)攤鋪。攤鋪機

23、前灑落的混合料要及時清理，人工在攤鋪好的路上進(jìn)行修補往往適得其反。碾壓速度要與攤鋪機速度相匹配。碾壓遍數(shù)，應(yīng)遵循：先靜壓一遍、振動兩遍、結(jié)束前靜壓二遍的五遍原則，同時要解決好粘輪與水隔離的關(guān)系。在碾壓時，先輕碾后重碾，先壓邊后逐步向路中心碾壓。按工藝規(guī)定的碾壓速度、遍數(shù)、重疊寬度進(jìn)行初壓、復(fù)壓、終壓三個步驟，終壓用雙輪靜壓收面，最后壓平輪跡。SBS改性瀝青路面施工是一項技術(shù)性強，涉及范圍比較廣的一個系統(tǒng)工程。在施工過程中，要充分調(diào)動施工人員的積極性和責(zé)任心，從原材料把關(guān)開始，對瀝青混合料拌和、運輸、攤鋪、壓實等工藝上進(jìn)行層層把關(guān)，這樣才能鋪筑出優(yōu)良的路面工程。6.工程檢測結(jié)果分析1）、室內(nèi)試驗

24、檢測數(shù)據(jù)分析分別對普通瀝青混合料、SBS改性瀝青混合料進(jìn)行了試驗。試驗結(jié)果如下表：試驗項目普通瀝青混合料SBS改性瀝青混合料級配類型AC-13AC-20AC-13AC-20齡期48小時48小時48小時48小時實測動穩(wěn)定度(次/mm)1880.5971582.9155726.7145249.8151764.7061740.3324846.0184500.0001842.1051507.1775727.1834841.149平均值1829.1361610.1415433.3054863.655從上表數(shù)據(jù)可以看出，使用SBS瀝青拌制的瀝青砼混合料，動穩(wěn)定度指標(biāo)比使用基質(zhì)瀝青拌制的瀝青混合料的穩(wěn)定度高

25、出最少3000次/mm。頭一段里提到了濕輪磨耗試驗，凍融劈裂強度這兩個指標(biāo)在網(wǎng)上找點數(shù)據(jù)在表里補充一下，2）、室外檢測數(shù)據(jù)分析晉中界-長治（K879+085-K1003+439）路段，其中K879+085-K880+085段采用5%SBS改性瀝青，其余路段采用基質(zhì)瀝青。通車一年后，對該路段進(jìn)行檢測。編兩組數(shù)據(jù)（采用段的數(shù)據(jù)，未采用段的數(shù)據(jù)），從檢測結(jié)果可以看出，經(jīng)歷了一個季節(jié)性氣溫變化以及車輛荷載的反復(fù)作用，基質(zhì)瀝青段的車轍深度為10.3（15），其他路段均未出現(xiàn)車轍，滿足瀝青路面養(yǎng)護(hù)質(zhì)量標(biāo)準(zhǔn)的要求。同事鉆孔取樣多處發(fā)現(xiàn)施工層與原路面結(jié)合良好。7.結(jié)論室內(nèi)試驗結(jié)論表明，隨著改性劑的加入，改善了

26、瀝青高溫穩(wěn)定性和低溫抗裂性能，增強了瀝青混合料耐磨耗能力，抗車轍性能和抗裂性能，各項性能指標(biāo)均優(yōu)于基質(zhì)瀝青混合料。從養(yǎng)護(hù)工程使用效果表明，3%SBS改性段和5%SBS改性段的使用效果沒有明顯差異。兩者路用性能對比還需進(jìn)一步觀測。SBS改性瀝青在上面層路面鋪筑中的應(yīng)用，適用于路面病害不太嚴(yán)重的場合。施工前，應(yīng)對原路面較寬、較深的裂縫進(jìn)行處理；可以為行車提供一個平整的、耐磨的、粗糙的表面，上面層路面鋪筑層與原路面結(jié)合緊密，沒有剝離現(xiàn)象，可以滿足高等級公路恢復(fù)路表功能的要求。參考文獻(xiàn)：【1】 中國公路學(xué)會調(diào)查組我國高速公路瀝青路面早期破壞的現(xiàn)狀及對策【J】中國公路建設(shè)市場.2003(3).P33-3

27、8【2】 GB 50092-96公路瀝青路面施工及驗收規(guī)范【S】【3】 JTJ036-98公路改性瀝青路面施工技術(shù)規(guī)范【S】：streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is strictly your presentation pub

28、lished strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a lot of fruitful work, has made

29、many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the four winds some outstanding issues 1, oppose formalism. One theory is that he didnt, with less close contact. Theoretical study of cons

30、ciousness is not high enough, system performance is not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good enough, not really understand an

31、d grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ideological work is the objective

32、, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is inadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically drive less. For example, rural cult