What should I pay attention to when paving asphalt in rainy days?

Construction is not allowed in rainy days. It also has an effect on flatness.

Matters needing attention in asphalt mixture pavement construction:

(1) Choose mixing equipment to ensure the backcourt construction quality. The performance and production capacity of asphalt concrete mixer are one of the main aspects in asphalt mixing equipment centered on mixer. In order to ensure that the production capacity of the mixing plant matches the project scale, the mixing plant must be automatically controlled in the whole process, and can analyze data, verify production capacity and analyze mixing quality.

It is best to have a matching secondary dust removal device. The mixer is selected, and then the asphalt heating equipment, mineral powder additive adding equipment, loader and other auxiliary equipment are optimized to ensure the matching with the mixer in performance and supply and demand capacity, so as to meet the production requirements of the mixer. ?

(2) To ensure the quality of raw materials, first of all, we should pay attention to the inspection of aggregates, and pay close attention to the implementation from the two major indicators of processability and structure. Coarse aggregate should pay attention to the indexes such as particle size, shape, softness and adhesion. When signing the supply contract, we should pay attention to ensure that the screening gradation of coarse aggregate changes little, and the contents of weak particles, dolomite and feldspar in stone are controlled within a reasonable range.

Fine aggregate should pay attention to sand equivalent (or? 0.075 content) and adhesion index, should strictly control the sand, scaffolding comes into play after timely rain and sun protection. All aggregates shall be stored in grades and shall not be mixed. In order to prevent material segregation, the site must be hardened, and horizontal or slope layered stacking is adopted when stacking, and conical stacking is not allowed. Asphalt raw materials should start with viscosity and other indicators to ensure excellent asphalt indicators and meet the design requirements. ?

(3) In the process of mixing, the quality of finished products should be guaranteed. In production, it is the key to design the production mixture ratio and ensure that the target mixture ratio can be realized in mixing. In order to ensure the balance of cold and hot materials supply, the mixing plant has less unequal materials and overflow, so it is necessary to deal with the relationship between the speed and flow of cold materials, the selection of screen aperture, the determination of the supply ratio of hot bins and so on.

First, starting from the hot silo feeding, measures are taken to ensure the balanced storage of materials in each silo; Ensure the stability of raw material composition and feeding ratio. Then pay attention to the control of temperature and mixing time, ensure the mixing, storage and ex-factory temperature of asphalt, aggregate and mixture, and strictly control the total time of wet and dry mixing for each plate.