The effect of sand making machine in road construction

Asphalt pavement asphalt concrete is commonly known, by artificial selection has a certain gradation of aggregate, crushed stone or gravel, crushed stone, sand or slag; asphalt material with a certain proportion of the road, in the strict control of mixture under the condition of mixing into. With the development of science and technology, the demand of natural aggregate, asphalt pavement concrete need of gravel, sand and stones, slag gradually instead of natural material machining. The content of mineral powder in asphalt pavement construction will have a certain impact on the quality of pavement. Asphalt pavement concrete, when the fineness of slag increases, the dynamic stability of asphalt mixture increase, the slag is less than 0.075mm particle content changed from 75% to 90%, the dynamic stability is increased by 5%. Therefore, in the process of quality control should be selected, according to the mineral grading for powder fineness control + 5%. For the high temperature hot area, slag grinding using thin (0.075mm by the rate of 85%~90%) to improve the anti rutting performance of asphalt pavement is very necessary.

Because most of the asphalt mixture of crusher, sand making machine production, the source of the asphalt mixture mixing of particles less than 0.075mm is not just the powder, can be derived from the fine aggregate (sand or stone chips). In general, the fine aggregate in 0.075mm passing rate is in the range of 10%~15%, after mixing plant dust in production, but there are still 40%~70% of fine aggregate is less than 0.075mm particles into the asphalt mixture. The role of this part of the dust and powder to similar, so in considering the amount of slag, the particles should also be included. Powder plays an important role in the asphalt mixture, but the dosage should be appropriate, slag dosage less than enough to form a sufficient amount of asphalt surface adsorption; but too much will make clay into the group, which makes the pavement segregation of mortar, water stability, durability will decrease. After several tests, with asphalt mixture production equipment technology research and development to create the Shanghai world state, mixture of its production, according to the proportion of the output of stone, fine sand and powder, road construction equipment of asphalt mixture technology has been successfully used in more than one city, welcome to consult the fieldwork.