行業(yè)資訊

新鋪瀝青混合料面層異?，F(xiàn)象與防治措施

來源：http://www.todis.com.cn/ 日期：2023-01-06

眾所周知，瀝青路面施工是一項(xiàng)復(fù)雜的系統(tǒng)工程，個別項(xiàng)目受施工水平、內(nèi)在因素及外部環(huán)境影響，施工過程中瀝青混合料面層出現(xiàn)泛紅、推移、泛白等異?，F(xiàn)象，不僅影響了瀝青面層表觀質(zhì)量，使內(nèi)在質(zhì)量留下隱患，而且不同程度的影響了瀝青路面耐久性。下面濟(jì)南瀝青料廠家來講講新鋪瀝青混合料面層異常現(xiàn)象與防治措施。

As we all know, asphalt pavement construction is a complex system project. Some projects are affected by the construction level, internal factors and external environment. During the construction process, asphalt mixture pavement appears red, moving, white and other abnormal phenomena, which not only affect the apparent quality of asphalt pavement, leaving hidden dangers for the internal quality, but also affect the durability of asphalt pavement to varying degrees. Next, Jinan asphalt manufacturer will talk about the abnormal phenomena and prevention measures of newly paved asphalt mixture surface.

表面泛紅

Reddish surface

瀝青由不同分子量的碳?xì)浠衔锛捌浞墙饘傺苌锝M成，常溫下為黑色或黑褐色的粘稠液體或固體，在瀝青混合料中主要起膠結(jié)作用。通常情況下，普通瀝青混合料為黑色，改性瀝青呈黑亮光澤。表面泛紅主要表現(xiàn)在膠輪碾壓后，粗集料棱角、細(xì)集料的顆粒表面瀝青膜剝落、發(fā)泛紅現(xiàn)象。

Asphalt is composed of hydrocarbons with different molecular weights and their non-metallic derivatives. It is a black or dark brown viscous liquid or solid at room temperature, which mainly plays a cementing role in asphalt mixture. Generally, the common asphalt mixture is black, and the modified asphalt is black and shiny. The surface reddening is mainly manifested in the asphalt film peeling off and reddening on the surface of coarse aggregate corners and fine aggregate particles after rubber wheel rolling.

瀝青混合料結(jié)構(gòu)類型不同，施工后的表觀狀態(tài)、色澤也存在差異。SMA瀝青膠漿多，一般不用膠輪壓路機(jī)，表面泛紅現(xiàn)象較少;AC、Superpave密級配瀝青混合料以膠輪壓路機(jī)揉壓為主，在膠輪高溫反復(fù)揉搓作用下，表面容易出現(xiàn)泛紅現(xiàn)象;ATB瀝青穩(wěn)定碎石雖然是密級配瀝青混合料，一般大多采用普通道路石油瀝青，加之級配粗、油石比小，出現(xiàn)泛紅現(xiàn)象反而少。

The apparent state and color of asphalt mixture after construction are different due to different structure types. SMA has a lot of asphalt mortar. Generally, rubber tyred rollers are not used, and the surface is less red; AC, Superpave dense graded asphalt mixture is mainly rubbed by rubber wheel roller, and under the action of repeated rubbed rubber wheel at high temperature, the surface is prone to reddening; Although ATB asphalt stabilized macadam is a dense asphalt mixture, it generally uses ordinary road petroleum asphalt. In addition, the grading is coarse and the asphalt stone ratio is small, so there is less red phenomenon.

泛紅主要是由于瀝青與集料粘附性差引起的，同時與材料自身性質(zhì)、施工工藝等相關(guān)，若多方面影響因素疊加，將導(dǎo)致表面出現(xiàn)嚴(yán)重泛紅、瀝青膜剝離現(xiàn)象，直接影響路面表觀質(zhì)量，同時對后期使用性能留下質(zhì)量隱患。

The redness is mainly caused by the poor adhesion between asphalt and aggregate, and is related to the nature of the material itself, construction technology, etc. If multiple factors overlap, it will lead to serious redness on the surface and asphalt film peeling, which will directly affect the apparent quality of the pavement, and at the same time leave a quality hazard for the later use performance.
濟(jì)南瀝青料

橋面泛白

Whitening of bridge deck

隨著水分的不斷蒸發(fā)，白色可溶性物質(zhì)干燥后出現(xiàn)泛白現(xiàn)象。隨著時間推移，在雨水及車輛荷載反復(fù)作用下，內(nèi)部水化及沖刷作用不斷加劇，短時間內(nèi)便出現(xiàn)嚴(yán)重唧漿現(xiàn)象，終導(dǎo)致橋面瀝青鋪裝層產(chǎn)生局部坑槽、松散，給行車帶來大安全隱患，大大縮短路面使用壽命。

With the continuous evaporation of water, white soluble substances appear white after drying. With the passage of time, under the repeated action of rain and vehicle load, the internal hydration and scouring effect are increasingly intensified, and serious grout pumping occurs in a short period of time, which eventually leads to local potholes and looseness of the bridge deck asphalt pavement, which brings great potential safety hazards to driving and greatly shortens the service life of the short circuit surface.

橋面泛白主要出現(xiàn)在連續(xù)降雨天氣之后，早期表現(xiàn)為局部滲水。通常情況下，橋梁伸縮縫處出現(xiàn)的早，其次是縱坡相對較小、彎坡橋及存在高路段。對于單幅兩車道橋面瀝青鋪裝層，通常出現(xiàn)在高內(nèi)側(cè)，行車道容易出現(xiàn)局部泛白;單幅三車道的中間車道，一般泛白現(xiàn)象較為突出，無論是縱坡大或直線段、彎坡橋均勻發(fā)生，出現(xiàn)的幾率及分布范圍要比單幅二車道的大且早。

Whitening of the bridge deck mainly occurs after continuous rainfall, and it is manifested as local seepage in the early stage. Generally, the bridge expansion joints appear early, followed by relatively small longitudinal slopes, curved bridges and high sections. For single width two lane bridge deck asphalt pavement, it usually appears on the inner side of the high side, and the carriageway is prone to local whitening; In the middle lane of a single three lane road, the whitening phenomenon is generally more prominent. Whether the longitudinal slope is large or the straight section and curved slope bridge occur evenly, the probability and distribution range of the occurrence are larger and earlier than those of a single two lane road.

瀝青面層容易出現(xiàn)泛白的部位大都容易積水，雨水滯留時間較長且結(jié)構(gòu)內(nèi)部自由水多、排水不暢，重載車輛荷載及動水沖刷作用頻繁，這些條件加劇了橋面瀝青鋪裝層泛白、唧漿的發(fā)生。

The parts where the asphalt pavement is prone to whitening are prone to ponding, the rainwater stays for a long time, there is more free water in the structure, the drainage is not smooth, and the heavy vehicle load and dynamic water scouring are frequent. These conditions aggravate the occurrence of whitening and pumping of the asphalt pavement on the bridge deck.

究其原因，一方面由于施工期間降雨頻繁、各結(jié)構(gòu)層施工不連續(xù)，另一方面因?yàn)r青面層自身空隙率、滲水系數(shù)偏大，再者與瀝青混合料特征、施工水平及質(zhì)量控制措施有關(guān)，其次與橋面防排水設(shè)計、臨時排水措施等有直接關(guān)系。

The reasons are, on the one hand, frequent rainfall and discontinuous construction of each structural layer during the construction period, on the other hand, large porosity and permeability coefficient of asphalt pavement itself, on the other hand, related to asphalt mixture characteristics, construction level and quality control measures, and secondly, directly related to bridge deck waterproof and drainage design, temporary drainage measures, etc.

須認(rèn)真對待瀝青路面施工過程中出現(xiàn)的新現(xiàn)象、新問題，及時采取整改及處治技術(shù)措施。遵照瀝青路面全壽命周期理念，不斷強(qiáng)化施工細(xì)節(jié)與施工過程質(zhì)量管理，是確保表觀質(zhì)量與內(nèi)在質(zhì)量的有效措施，您對此有怎樣的問題點(diǎn)可以來我們網(wǎng)站http://www.todis.com.cn留言咨詢！

New phenomena and problems arising in the construction of asphalt pavement shall be seriously treated, and technical measures for rectification and treatment shall be taken in time. It is an effective measure to ensure the apparent and internal quality by following the whole life cycle concept of asphalt pavement and constantly strengthening the quality management of construction details and construction process. Please come to our website for any questions http://www.todis.com.cn Message consultation!

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