Article by cement mill
Waste Rubber cement mill industry, especially in the highway asphalt and asphalt concrete research and application in the international arena has been relatively long history. International literature on the first rubber asphalt British patent in 1843. Modern sense, rubber asphalt mixture first appeared in the sixties of the last century the United States; U.S. experts CharlesMcDdonald first produced rubber wet asphalt, the first time the production of rubber asphalt batch of successful applications to the laying of road works in Process.
Currently in the international rubber powder used in the field of road mainly in the following aspects:
1, Rubber Modified Asphalt
2, Rubber Modified Asphalt Concrete
3, Rubber Modified Asphalt Emulsion
4, rubber powder used in grassroots
5, rubber powder drainage material
Currently in the process, technical, economic and construction conditions and other comprehensive factors are more suitable for large Mianji Among its key is the rubber powder modified asphalt and crumb rubber modified asphalt Hunning Tu Cengmian two applications, the following Jiu Gai Xing asphalt rubber powder and rubber powder The application of asphalt concrete technology to do the following analysis:
1. Rubber Modified Asphalt
Rubber modified asphalt is the rubber powder in the road sector is the most common Di materials, from creation Zhijinyiyou 150 years of history, Danshiyouyu between crumb rubber and asphalt the Xianghuzuoyong very complicated, since there are still Henduozhuanjia this Jinxing Special study: crumb rubber and asphalt as the chemical composition are not identical, and both have great inertia, they touch each other – not as a direct chemical reaction, rubber powder and asphalt mixing up reaction is mainly financial. In the absence of other things, the role of Song supplementary materials, this reaction is mainly physical role, through research and testing found that crumb rubber and asphalt after mixing the particles became larger: study suggests that: the more rubber asphalt melting up fully, rubber powder Role in the pitch the better, the asphalt rubber powder the better.
The quality of the performance of rubber asphalt not only select the type, size and quality of the asphalt, and asphalt and rubber processing methods, mixing time, mixing temperature and type of the auxiliary agent; as asphalt rubber powder and the complexity of the process of refining Requires a stringent control; on the process of requirements and relatively harsh conditions, so the current foreign countries, success at the scale popularization of Guo Jia, when in Gongyi Luxiansheji Du Diao; Zhu Zhang centralized production and storage and transportation, Er Jiangdiaoxianchang production Xianchang use; Currently abroad in the processing of rubber asphalt mixing temperature is 180 degrees, for the continuous type mixing; and almost all are using wet mixing process, the use of the devices are generally easy to transport for the more advanced automation of continuous mixing equipment, the mixing effect is generally more satisfactory, while the foreign rubber asphalt mixing process in general is also a small amount mixed with other auxiliary materials.
After the addition of asphalt rubber processing and stone, slag production of rubber modified asphalt concrete mixing, but also for the stress absorbing layer (SAM), stress absorbing intermediate layer (SAMl), pavement surface (CHIPSEAL), waterproofing materials (TACKCOAT ), And sealing materials, etc.; and that these areas the use of rubber asphalt over asphalt or concrete.
2. Rubber Modified Asphalt Concrete
Rubber powder used in concrete, mainly dry and wet two process routes. Two lines almost parallel with the start of a period; wet rubber powder and asphalt mixing means and the mixing, kneading and mixing the material as a binder and then mixing with the mineral material technology, a broad wet is also included for seats Slurry Seal Coat rubber modified asphalt emulsion, etc., mainly referring to pre- dry powder and related materials will be mixed during mixing ratio of the roll- General and the current international comparison method of laying a large area laid mainly wet Process, there are few dry laying processes, but are not laying a large area of promotion, from a technology point of view and layingwet laid Youdian obvious, mainly in the following areas:
1. Wet laying process more mature, more sophisticated mixing equipment, capable of high volume and continuous production operations.
2. Wet laying process of integration in the powder and the asphalt has become even more fully, the process of laying in the road better in quality assurance.
3. Wet laying process on the laying of a factor required in relatively flexible and the quality of the powder product can be done well to adapt to the use of rubber powder is relatively low supply of raw materials more convenient, more economical.
China rubber powder in the road construction technology in the application field of study has started in the early eighties, in the late eighties for a shortinto the development period, but because of the introduction of foreign technology and blind study on the Mangmu Led to the failure of development in China in 2001, the new lead agency by the Ministry of Communications of the project in-depth demonstration and research, while a large number of foreign capital and technology to enter and keep the powder in the road construction technology in China in The application of research in the field with rapid development, along with the continued development of the Jishu and state environmental protection industry ‘s continued support, rubber powder application in the field of road construction Ji Shu Zhong Jiang in China ‘s Qian Jing Ju You a good.
Waste Rubber cement mill industry, especially in the highway asphalt and asphalt concrete research and application in the international arena has been relatively long history.
