What are the notices of color asphalt concrete pavement?
彩色沥青路面施工认为彩色沥青混凝土路面是一种新兴的道路路面，因其性能和外观上的优势受到越来越多重视和关注，并在我国很多城市得到应用，在这方面的探讨我国开始于80年代初，但收效甚微，且在城市道路上应用尚少，近几年，随着我国经济社会发展，彩色沥青混凝土路面作为一种新型道路路面，为营造交通的时代气息，在我国也得到了越来越多的应用，引起了人们的兴趣和关注，被全球工程界视为“新型绿色建材” 目前我公司彩色沥青混凝土路面已成功在本市湖滨大道路面进行了试验铺筑，效果颇佳，深受世人好评。现就对彩色沥青混凝土路面原材料选择、配合比设计、施工技术及注意事项进行总结和阐述，为以后彩色沥青混凝土路面施工积累经验。
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）结合料：彩色沥青结合料应满足AH-70沥青基本指标，由于浅色结合料中不含沥青质，与沥青同样标号的浅色结合料实际黏度仍然要低一点，所以在选择浅色结合料时应提高结合料的一个等级。 （2）集料：配置集料应表面清洁、粗糙而富有棱角，质地坚硬、颗粒近似立方体轧制碎石，其色彩最好与配置混合料接近，不能使用黑色或深灰色碎石料；红色沥青路面可选择石灰岩、花岗岩、安山岩，技术要求应满足现行规范的有关规定。 （3）颜料：铺筑红色沥青路面经常使用氧化铁红颜料，国家标准《氧化铁红颜料技术标准》如下： 用于彩色沥青路面的铁红颜料，其主要技术指标为色相和粒度，其次为着色力和遮盖力、分散性和稳定性。研究认为：色相（包括颜料表现色和沥青混合料呈现色）与颜料粒子大小和形状有关。
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、彩色沥青混凝土路面配合比设计 （1）彩色沥青混合料配合比设计可采用马歇尔方法，根据体积参数确定最佳油石比，和普通沥青混凝土配合比设计基本相同，其关键在于确定颜料用量，颜料用量可根据试验确定，以所拌和的混合料肉眼观察具有足够的光亮度和鲜艳的色彩为度。 （2）颜料用量一般取1.5%-3%，不宜过多，颜色太深，不但使混合料表面过暗而影响色彩，而且还增加成本。 （3）沥青用量为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、贵州彩色沥青浅谈彩色沥青混凝土路面施工技术及注意事项 （1）清洗拌缸：防止彩色沥青混合料收到污染。 （2）设置浅色结合料输送管线：防止原沥青输送管线中残留沥青的污染。 （3）颜料人工投入：按颜料比例事先称好装入塑料袋中，当集料进入拌缸立即投入颜料。 （4）控制温度：彩色沥青混合料对温度比较敏感，过高的温度容易造成无色、沥青老化，过低的温度造成压实困难，故应严格控制彩色沥青各阶段的施工温度，确保施工质量。加热温度根据沥青结合料的黏温特性做试验确定，一般结合料加热温度150℃-160℃，石料加热温度为160℃-170℃，出料温度为145℃-155℃，在生产过程中严格控制加热温度，并不可随意改变拌和时间，以免造成不同批次成产的彩色沥青混合料颜色的明显差异。 （5）控制拌和时间：每盘拌和时间较一般沥青混合料延长10-15s,以保证颜料分散均匀。具体拌合时间为：干拌时间不小于10s，喷入结合料，加入矿粉后搅拌不少于45S，即总拌合时间不小于55S，经拌和的彩色沥青混合料必须颗粒均匀、色泽一致，集料所有颗粒都将被结合料所覆盖，不得带有白斑点、离析、结块或成团、粗细分离以及色彩明显差异等现象。 （6）摊铺碾压：在摊铺前将摊铺机熨平板，螺旋器、收料斗等用溶剂擦洗，并用热白料干搅，以彻底清理残留的黑色沥青。铁揪、刮板在使用前用食用油与水配置的液体浸泡，以减少对彩色沥青混合料的黏附，在摊铺过程中如发现严重污染、离析、色彩明显差异的混合料予以清除，摊铺温度控制在140℃以上，摊铺系数为1.15-1.25，由于彩色沥青混合料散热较快，因此摊铺后应立即碾压，碾压前将压路机光轮擦洗干净，初压温度控制在130℃以上，静压一遍以固定路缘边线，如发现不平整、粗细离析严重立即修补，复压仍采用静压方式，碾压3-4遍，终压以消除轮迹线为度，终压温度控制在80℃以上，对于紧靠路缘石处的彩色沥青路面采用手推式振动碾进行碾压，在碾压过程中控制好速度，避免紧急制动，注意压路机洒水
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