2 results about "Subbase (pavement)" patented technology

This invention discloses a low-carbon footprint road stabilization layer material and method based on recycled sand production tailings, belonging to the fields of road construction materials, solid waste disposal, and carbon neutrality technology. This invention replaces all fine aggregates with recycled sand production tailings. Road stabilization layers prepared using this invention exhibit the following 7-day unconfined compressive strengths: base course ≥ 3.0 MPa, subbase course ≥ 2.0 MPa; 28-day base course ≥ 5.0 MPa, subbase course ≥ 3.0 MPa; 7-day water immersion strength loss ≤ 13%. The overall performance meets the industry standard JTG / T F20-2015 "Technical Specifications for Highway Pavement Base Course Construction," reducing costs by 18%~30% and carbon emissions by 30%~50%. It achieves resource utilization of sand production tailings, is compatible with existing construction equipment, and is suitable for base and subbase construction of Class I to IV highways and municipal roads, combining environmental friendliness and engineering economy.

This invention discloses a low-temperature crack-resistant composite modified asphalt pavement structure, relating to the field of asphalt concrete pavement technology. It solves the technical problem of lacking an asphalt pavement structure that can reduce thermal shrinkage cracking in low-temperature environments without affecting the bonding effect between the base course and the asphalt surface layer and with low construction difficulty. The invention comprises, from top to bottom, a dense composite modified asphalt concrete top layer, a dense-graded composite modified asphalt concrete intermediate layer, a dense-graded modified asphalt concrete fatigue-resistant bottom layer, a modified asphalt synchronous chip seal, a crack-resistant cement-stabilized crushed stone base course, a crack-resistant cement-stabilized crushed stone subbase course, and a subbase. A modified emulsified asphalt bonding layer is provided between the top layer, intermediate layer, and bottom layer. A common emulsified asphalt tack coat is provided between the synchronous chip seal and the base course. The purpose is to enhance the bonding between the various structural layers of the pavement and ensure the shear resistance of the pavement structural layers.