I. Basic Raw Materials of Asphalt Concrete
Asphalt concrete is mainly composed of aggregates, asphalt, and mineral powder. Aggregates are typically crushed stone of different particle sizes, accounting for approximately 90-95%; asphalt acts as a binder, accounting for 4-7%; and mineral powder is used to fill voids, accounting for 1-3%. The mixing plant will adjust the mix proportions according to project requirements to ensure the finished product has good strength and durability.
II. Production Process of a Mixing Plant
Raw Material Pretreatment: Aggregates are screened, washed, and dried to remove impurities and moisture.
Precise Measuring: Each component is automatically weighed according to the designed mix proportion.
High-Temperature Mixing: Thorough mixing is carried out at 160-180℃.
Finished Product Storage: Temporarily stored in insulated warehouses to prevent rapid temperature drop.
III. Quality Control During Production
Temperature control is crucial; the asphalt heating temperature must be maintained between 150-170℃. The mixing time is typically 30-45 seconds to ensure uniform mixing. The finished product undergoes random sampling inspection, mainly testing indicators such as compaction, porosity, and stability.