彩色瀝青混凝土路面注意事項是什么？

What are the notices of color asphalt concrete pavement?

彩色瀝青路面施工認為彩色瀝青混凝土路面是一種新興的道路路面，因其性能和外觀上的優(yōu)勢受到越來越多重視和關注，并在我國很多城市得到應用，在這方面的探討我國開始于80年代初，但收效甚微，且在城市道路上應用尚少，近幾年，隨著我國經(jīng)濟社會發(fā)展，彩色瀝青混凝土路面作為一種新型道路路面，為營造交通的時代氣息，在我國也得到了越來越多的應用，引起了人們的興趣和關注，被全球工程界視為“新型綠色建材” 目前我公司彩色瀝青混凝土路面已成功在本市湖濱大道路面進行了試驗鋪筑，效果頗佳，深受世人好評?，F(xiàn)就對彩色瀝青混凝土路面原材料選擇、配合比設計、施工技術及注意事項進行總結和闡述，為以后彩色瀝青混凝土路面施工積累經(jīng)驗。

The color of asphalt concrete pavement is a new pavement, has attracted more and more attention because of its performance and appearance advantages, and is widely used in many city of our country, discusses our country at the beginning of 80s in this area, but have little effect, and the application in the city road is rare in recent years and with China's economic and social development, the color of asphalt concrete pavement is a new type of road traffic, in order to create a spirit of the times, in China has been more and more widely, has aroused people's interest and attention, be regarded as "new green building" at present, the color of asphalt concrete pavement has been successful in the Hubin Road Pavement Test paving, global engineering effect is very good, by the people of the world. This paper summarizes and expounds the selection of raw materials, proportioning design, construction technology and matters needing attention for color asphalt concrete pavement, so as to accumulate experience for future color asphalt pavement construction.

1、原材料 （1）結合料：彩色瀝青結合料應滿足AH-70瀝青基本指標，由于淺色結合料中不含瀝青質，與瀝青同樣標號的淺色結合料實際黏度仍然要低一點，所以在選擇淺色結合料時應提高結合料的一個等級。 （2）集料：配置集料應表面清潔、粗糙而富有棱角，質地堅硬、顆粒近似立方體軋制碎石，其色彩最好與配置混合料接近，不能使用黑色或深灰色碎石料；紅色瀝青路面可選擇石灰?guī)r、花崗巖、安山巖，技術要求應滿足現(xiàn)行規(guī)范的有關規(guī)定。 （3）顏料：鋪筑紅色瀝青路面經(jīng)常使用氧化鐵紅顏料，國家標準《氧化鐵紅顏料技術標準》如下： 用于彩色瀝青路面的鐵紅顏料，其主要技術指標為色相和粒度，其次為著色力和遮蓋力、分散性和穩(wěn)定性。研究認為：色相（包括顏料表現(xiàn)色和瀝青混合料呈現(xiàn)色）與顏料粒子大小和形狀有關。

1, raw materials (1) binder: color asphalt binder should meet the basic index of asphalt binder AH-70, because the light is not included in the asphalt and asphalt binder of the same label light actual viscosity still to a low point, so in the choice of light colored binder should be increased with a level of material. (2): the allocation of aggregate aggregate should be clean surface, rough and full of sharp, hard texture, particle approximate cube rolling stone, the best color and configuration mixture close, can not use black or dark grey aggregates; red asphalt pavement can choose limestone, granite, andesite, should meet the technical requirements of the relevant provisions of the current specification the. (3) red pigment: paving asphalt pavement often use Confidante iron oxide material, following the national standard "technical standard": iron oxide Confidante material for pigment color of asphalt pavement, the main technical indexes for hue and size, followed by coloring and hiding power, dispersion and stability. It is believed that the color phase (including the color of the pigment and the color of the asphalt mixture) is related to the size and shape of the pigment particles.

2、彩色瀝青混凝土路面配合比設計 （1）彩色瀝青混合料配合比設計可采用馬歇爾方法，根據(jù)體積參數(shù)確定最佳油石比，和普通瀝青混凝土配合比設計基本相同，其關鍵在于確定顏料用量，顏料用量可根據(jù)試驗確定，以所拌和的混合料肉眼觀察具有足夠的光亮度和鮮艷的色彩為度。 （2）顏料用量一般取1.5%-3%，不宜過多，顏色太深，不但使混合料表面過暗而影響色彩，而且還增加成本。 （3）瀝青用量為5%-6.5%

Mix design of asphalt concrete pavement, 2 color (1) color asphalt mixture design by Marshall method, according to the volume parameter to determine the optimum asphalt aggregate ratio, and the ordinary asphalt concrete mix design is basically the same, the key is to determine the amount of the pigment, the pigment content can be determined according to the test, the observation has enough brightness and bright the color of the mixture by mixing the naked eye. (2) the amount of pigment is generally 1.5%-3%. It is not too much and the color is too deep. It not only makes the mixture surface too dark but also affects the color, but also increases the cost. (3) the amount of asphalt is 5%-6.5%

3、貴州彩色瀝青淺談彩色瀝青混凝土路面施工技術及注意事項 （1）清洗拌缸：防止彩色瀝青混合料收到污染。 （2）設置淺色結合料輸送管線：防止原瀝青輸送管線中殘留瀝青的污染。 （3）顏料人工投入：按顏料比例事先稱好裝入塑料袋中，當集料進入拌缸立即投入顏料。 （4）控制溫度：彩色瀝青混合料對溫度比較敏感，過高的溫度容易造成無色、瀝青老化，過低的溫度造成壓實困難，故應嚴格控制彩色瀝青各階段的施工溫度，確保施工質量。加熱溫度根據(jù)瀝青結合料的黏溫特性做試驗確定，一般結合料加熱溫度150℃-160℃，石料加熱溫度為160℃-170℃，出料溫度為145℃-155℃，在生產(chǎn)過程中嚴格控制加熱溫度，并不可隨意改變拌和時間，以免造成不同批次成產(chǎn)的彩色瀝青混合料顏色的明顯差異。 （5）控制拌和時間：每盤拌和時間較一般瀝青混合料延長10-15s,以保證顏料分散均勻。具體拌合時間為：干拌時間不小于10s，噴入結合料，加入礦粉后攪拌不少于45S，即總拌合時間不小于55S，經(jīng)拌和的彩色瀝青混合料必須顆粒均勻、色澤一致，集料所有顆粒都將被結合料所覆蓋，不得帶有白斑點、離析、結塊或成團、粗細分離以及色彩明顯差異等現(xiàn)象。 （6）攤鋪碾壓：在攤鋪前將攤鋪機熨平板，螺旋器、收料斗等用溶劑擦洗，并用熱白料干攪，以徹底清理殘留的黑色瀝青。鐵揪、刮板在使用前用食用油與水配置的液體浸泡，以減少對彩色瀝青混合料的黏附，在攤鋪過程中如發(fā)現(xiàn)嚴重污染、離析、色彩明顯差異的混合料予以清除，攤鋪溫度控制在140℃以上，攤鋪系數(shù)為1.15-1.25，由于彩色瀝青混合料散熱較快，因此攤鋪后應立即碾壓，碾壓前將壓路機光輪擦洗干凈，初壓溫度控制在130℃以上，靜壓一遍以固定路緣邊線，如發(fā)現(xiàn)不平整、粗細離析嚴重立即修補，復壓仍采用靜壓方式，碾壓3-4遍，終壓以消除輪跡線為度，終壓溫度控制在80℃以上，對于緊靠路緣石處的彩色瀝青路面采用手推式振動碾進行碾壓，在碾壓過程中控制好速度，避免緊急制動，注意壓路機灑水

3, Guizhou color asphalt, color asphalt concrete pavement construction technology and matters needing attention (1) cleaning and mixing cylinder: prevent color asphalt mixture from pollution. (2) setting light colored binder pipeline: prevent the pollution of residual bitumen in the primary bitumen pipeline. (3): according to the proportion of artificial pigment into the pigment in advance than in a plastic bag, when the aggregate into the mixing cylinder immediately put into pigment. (4) control temperature: color asphalt mixture is more sensitive to temperature. Too high temperature easily causes colourless and asphalt aging. Too low temperature causes compaction difficulty. Therefore, we should strictly control the construction temperature of every stage of color asphalt and ensure the quality of construction. The heating temperature according to the asphalt test material to determine the viscosity temperature characteristics, combined with the general material heating temperature of 150 DEG -160 DEG stone, the heating temperature is 160 DEG -170 DEG, the discharging temperature is 145 DEG -155 DEG, strictly control the heating temperature in the production process, do not arbitrarily change the mixing time, so as not to cause significant differences in color the color asphalt mixture produced in different batches. (5) control mixing time: the mixing time of each dish is longer than that of the general asphalt mixture to extend 10-15s to ensure the dispersion and uniformity of the pigment. Concrete mixing time: dry mixing time is not less than 10s, injected into the binder, adding powder after mixing of not less than 45S, which is the total mixing time is not less than 55S, the color asphalt mixture must be uniform particles, color consistency, aggregate particles will be combined with the material covered with white spots, no segregation, agglomeration or cluster, the thickness of separation and obvious color difference phenomenon. (6) paving and rolling: before the paving, the paver, the screed, the screw and the hopper are scrubbed with solvents, and dried with hot white material to thoroughly clean up the remaining black asphalt. Before use, the scraper shovel with edible oil and water soaking liquid, to reduce the adhesion of the color asphalt mixture, such as found in the process of paving mixture segregation, serious pollution, obvious color difference will be eliminated, paving temperature controlled at 140 DEG C, spreading coefficient is 1.15-1.25, because of the color asphalt mixture cooling rapidly, thus paving immediately after rolling, rolling the roller wheel clean, initial pressure temperature controlled at 130 DEG C, static pressure again to the edge of the road such as fixed line, uneven thickness, found serious segregation immediately repair, re pressing is still using the static method, rolling 3-4 times, final pressure to remove the wheel line for the degree of final pressure temperature controlled at 80 DEG C, the color of asphalt pavement close to the curb at the hand push type vibration roller for rolling speed control in rolling process, Avoid emergency braking and pay attention to the water sprinkler of the roller