Open-gradation storage type asphalt mixture for patching of draining asphalt pavement

Abstract

The invention belongs to the technical field of building materials in road engineering and particularly relates to an open-gradation storage type asphalt mixture for patching of a draining asphalt pavement. The mixture comprises aggregate, a filler, a fiber stabilizer and diluted asphalt, and the largest nominal grain size of the mixture is 13.2mm. The aggregate comprises coarse aggregate and fine aggregate, the coarse aggregate is made of basalt or diabase, the fine aggregate is made of limestone, and the largest nominal grain size of the aggregate is 13.2mm. The filler is made of limestone ore powder. The fiber stabilizer is made of a lignin fiber or a basalt mineral fiber or a mixed fiber of the lignin fiber and the basalt mineral fiber, and the dosage of the fiber stabilizer is 0.1%-0.6% of mass of the mixture. The diluted asphalt is diluted polymer modified asphalt, and a modifier in the diluted asphalt is a patented product RST modifier produced by Shanghai Pudong Road and Bridge Construction Co., Ltd. The asphalt mixture has the advantages of being long in storage time, convenient and quick to construct and the like.

Description

technical field

[0001] The invention belongs to the technical field of building materials used in road engineering, and in particular relates to an open-graded storage type asphalt mixture used for repairing drainage asphalt pavement. Background technique

[0002] Drainage asphalt pavement is a typical skeletal pore structure. A large number of interconnected spaces form a well-developed drainage network inside the road. Rainwater is discharged from the interior of the road body along the cross slope of the network through the network. With the promotion of Expo drainage asphalt pavement application, its rainy road surface has no water, no water mist, anti-glare, good skid resistance, and outstanding safety performance; noise reduction, mitigation of heat island effect, material saving, low-carbon environmental protection and other advantages are gradually recognized by people. Drainage asphalt As a high-grade pavement, pavement is expected to become the main pavement struct...