未核实，仅供参考中国高等公路的发展速度及经济投入在世界上首屈一指,但多数高速公路的使用年限却只有3,4年,有的甚至未过一年就出现了严重破损,使得国家在人力,物力上的投入过大.在沥青路面的主要病毒中,车辙现象尤其普遍,对于路面的损坏也*严重,大大提高路面的修复费用.车辙问题通常在第1个夏季的高温期就会出现,有的路面车辙深度为10~50mm,有的甚至达100mm以上,使路面平整度变差,并很快出现网裂,坑洞,坑槽等病毒.常州筑威建筑材料有限公司联合国内相关科研所开发的DXG-1抗车辙剂,为解决沥青路面的车辙现象提供了有效实用和教为经济的手段.
一、DXG-1抗车辙剂的基本性能DXG-1抗车辙剂呈深,固体,颗粒状
采用DXG-1抗车辙的沥青混凝土的高温性能,低温性能,水稳定性各项指标均符合我国>(JTGF40-2006)的质量要求,具有良好路用性能.
四种常用改性沥青以及添加DXG-1抗车辙剂两种比例对抗车辙效果的影响
Anti-Rut Agent
Chinese Higher highway speed of development and economic investment in the world, second to none, but most of the service life of the highway was only 3,4 years, some even did not have a year there have been serious damage, the country in terms of manpower, material resources on the input too large. At the main virus asphalt pavement, the rutting phenomenon is particularly prevalent, for the road damage is also the most serious and greatly improve the cost of repairing the road. rutting at the first question is usually a summer high temperature phase will appear, and some Pavement Rutting a depth of 10 ~ 50mm, and some even up to 100mm and above, so that the road surface roughness variation, and soon crack Net, holes, pits and other virus. Changzhou Granville building construction materials related domestic institutes Ltd. United Development DXG -1 anti-rutting agent, to resolve the situation rutting of asphalt pavement to provide practical and effective teaching for economic means.
DXG-1 anti-rutting performance of agent s basic DXG-1 anti-rutting agent was dark, solid, granular.
Table 1-DXG-1 anti-rutting characteristics of additives:
The product for the fiber polymer. One of fibers greater than 95% of polymer composition, filler composition is less than 5%.
Two, DXG-1 anti-rutting mechanism of additives.
DXG-1 anti-rutting additive role in the adoption of the following four years of implementation of the modified asphalt mixture.
1. Inlay squeezing effect: the additive particles in the construction process because of the role of high-temperature softening of these particles in the hot rolling process of molding, which is equivalent to a high adhesion of a single particle size fine aggregate filler inlay onto the aggregate skeleton in the gap, an increase of asphalt mixture structure of the skeleton role in strengthening the interaction between the mixture, and bring mixture between the more closely, reducing the permeability of the molding surface. At the same time, an increase of asphalt mixture under load capacity.
2. Reinforced the role: as a result of polymer additives in the formation of micro-crystalline area with considerable stiffness, it is part of the process of mixing at drawing into a plastic fibers, in the aggregate skeleton inside the bypass formed by crosslinking the role of fiber reinforcement. Because of polymerization The existence of fiber material, which form a mesh material in the cement, slag cement reinforced asphalt material interaction and the overall system.
3. Cementation: additive into the asphalt mixture mixing pot, at 170 ~ 180 ° C temperatures, first of all do with the mineral aggregate mix, so that it softened, continue to add asphalt mixing, asphalt additive particles and the formation of cementation, so that the performance of asphalt to improve. improve the asphalt s softening point; reduced sensitivity to temperature; an increase of asphalt and mineral aggregate adhesion.
4. Restore the role of deformation: three of Asphalt Mixture Rutting flexibility additive composition teaching high temperature deformation of the road have the flexible part of the restore function, thereby reducing the molding of asphalt pavement permanent deformation.
DXG-1 anti-rutting and additive mixture after mixing process, and its hot mineral aggregate particles in the collision, shear under General, to achieve the four additive process, so that the performance of asphalt mixture to change to improve and improve.
Three, DXG-1 Anti-Rut Agent Applications
Highway, heavy traffic roads, vehicles intersection region, the airport runway, bus lanes, industrial flooring, container stacking space requirements under heavy load, such as roads and venues.,
Four, DXG-1 anti-rutting additives to add volume and Technology
DXG-1 anti-track the use of additives for asphalt mixture dose of 0.3 ~ 0.5%, that is a ton Asphalt Mixture doped 3 ~ 5KG. Spent on roads and highways are generally doped 0.35-0.4%, which is a ton Asphalt Mixture-doped 3.5-4KG can. traffic volume is very large, heavy vehicles and more high-limit, special sections may be doped more than 0.6 percent.
DXG-1 anti-rutting additive easy to use technology to facilitate, through the mixing process of asphalt mixture directly add:
1. Mineral aggregate will be heated to 170 ~ 180 ° C when mixing additives directly into the pan to dry mixing, mixing time increased 2 ~ 3 seconds.
2. To continue to add hot asphalt mixing, mixing time can be a relative increase.
3. Finished mixture of quality control and storage of transport by conventional mixture to carry out.
Friday, DXG-1 anti-rutting rutting test results additives
Project units
0.6% DXG-1 Anti-Rut Agent 99.4% 70 # asphalt mixture test results
> (JTGF40-2006) The quality requirements
DXG-1 using anti-rutting of asphalt concrete high-temperature performance, low-temperature properties, water stability of the indicators are in line with our country > (JTGF40-2006) quality requirements, has excellent road performance.
Four commonly used modified asphalt, and add DXG-1 ratio of two doses of anti-rutting rutting effect of confrontation
该产品为纤维聚合物.其中纤维聚合物成分大于95%,填充物成分小于5%.一、DXG-1抗车辙添加剂的作用机理.
DXG-1抗车辙添加剂通过以下四种作用来实现对沥青混合料的改性.
1.嵌挤作用:添加剂微粒在施工过程中由于高温的作用而软化,这些微粒在碾压过程中热成型,相当于具有高粘附性的单一粒径细集料填充嵌挤到了集料骨架中的空隙,增加了沥青混合料结构的骨架作用,加强了混合料之间的相互作用力,使混合料之间更加紧密,降低了成型路面的渗透性.同时增加了沥青混合料承受荷载弟力.
2.加筋作用:由于添加剂中聚合物形成的微结晶区具有相当的劲度,它在拌和过程中部分拉丝成塑料纤维,在集料骨架内搭桥交联而形成纤维加筋作用.由于聚合物纤维的存在,它在胶结料中形成网状,加强了沥青矿粉胶结料体系相互作用和整体性.
3.胶结作用:添加剂投入沥青混合料的拌和锅中,在170~180°C的温度下,首先通过与矿料干拌,使它软化,继续加入沥青拌和,添加剂颗粒与沥青形成胶结作用，使沥青性能得到改善.提高了沥青的软化点;降低了对温度的敏感性;增加了沥青与矿料的粘附能力.
4.变形恢复作用:车辙三沥青混合料添加剂的弹性成分在教高温度时具有使路面的变形部分弹性恢复的功能,因而降低了成型沥青路面的永久变形.
DXG-1抗车辙添加剂经过和混合料的拌和过程,其颗粒在热矿料的碰撞,剪切综合作用下,促使添加剂实现四种作用过程,使沥青混合料性能发生变化,达到提高和改善.
一、DXG-1抗车辙剂应用范围
高速公路,重交通道路,车辆交汇区域,机场跑道,公交车道,工业地面,集装箱堆放场地等要求承受重载的道路和场地.
二、DXG-1抗车辙添加剂量及添加工艺
DXG-1抗车辙添加剂的使用剂量为沥青混合料的0.3~0.5%,即每吨沥青混合料中掺3~5KG.用于道路则一般掺0.35-0.4%,即每吨沥青混合料中掺3.5-4KG即可.交通量大,重型车辆多的用高限,特殊路段可掺0.6%以上.
DXG-1抗车辙添加剂的使用工艺方便简单,通过沥青混合料拌和过程中直接加入:
1.将矿料加热到170~180°C时,将添加剂直接投入拌和锅内进行干拌,拌和时间可增加2~3秒.
2.加入热沥青继续搅拌,拌和时间可相对增加.
3.成品混合料的质量控制和储存运输按常规的混合料进行.
一、DXG-1抗车辙添加剂车辙试验结果
项目 单位
0.6%DXG-1抗车辙剂99.4%70#沥青混合料试验结果
>(JTGF40-2006)的质量要求
