High-viscosity high-elasticity asphalt for seamless expansion joint and preparation method of high-viscosity high-elasticity asphalt

Abstract

The invention discloses high-viscosity high-elasticity asphalt for a seamless expansion joint and a preparation method of the high-viscosity high-elasticity asphalt. The high-viscosity high-elasticityasphalt comprises the following raw materials in parts by weight: 49-93 parts of matrix asphalt, 7-41 parts of an additive, 2-21 parts of a mineral powder fiber, 35-40 parts of graded macadam, 0.2-1.4 parts of a cross-linking agent, 5-10 parts of a stabilizer and 1-5 parts of a tackifying resin, wherein the additive comprises rubber powder, a styrene-butadiene-styrene segmented copolymer, PE, anepoxy resin, a fiber and mineral powder; the cross-linking agent comprises sulfur and natural asphalt. By adopting the high-viscosity high-elasticity asphalt, the viscosity and the elasticity of asphalt can be improved, the service life of the asphalt can be greatly prolonged, various properties of the asphalt can be detected, the quality of the asphalt can be controlled, and the preparation method is simple.

Description

technical field [0001] The invention relates to the field of asphalt, in particular to a high-viscosity and high-elasticity asphalt used for seamless expansion joints and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metal derivatives. It is a kind of high-viscosity organic liquid. It is liquid and has a black surface. It is soluble in carbon disulfide. Asphalt is a waterproof and moisture-proof and Anti-corrosion organic gelling material. Asphalt can be mainly divided into three types: coal tar pitch, petroleum pitch and natural pitch. Among them, coal tar pitch is a by-product of coking, petroleum pitch is the residue after crude oil distillation, and natural pitch is stored underground. Accumulated on the surface of the earth's crust, asphalt is mainly used in coatings, plastics, rubber and other industries and paving roads, etc. After retrieval, th...

AI Technical Summary

Problems solved by technology

Asphalt can be mainly divided into three types: coal tar pitch, petroleum pitch and natural pitch. Among them, coal tar pitch is a by-product of coking, petroleum pitch is the residue after crude oil distillation, and natural pitch is stored underground. Accumulated on the surface of the earth's crust, asphalt is mainly used in coatings, plastics, rubber and other industries and paving roads, etc. After retrieval, the patent document with application number 200910085235.4 discloses a high-viscosity and high-elasticity asphalt and its preparation method. The high-viscosity and high-elasticity asphalt Made of the following components: 50-92 parts by mass of bitumen base, 8-40 parts by mass of additives and 0.1-12 parts by mass of crosslinking agent; the additives are rubber powder and styrene-butadiene-styrene Block copolymer, wherein, the mass ratio of rubber powder and styrene-butadiene-styrene block copolymer is (0.5-35): (3-12); The crosslinking agent is sulfur and natural asphalt, Wherein, the mass ratio of sulfur and natural asphalt is 1: (0.1-20); the dynamic viscosity of the high-viscosity and high-elasticity asphalt at 60°C is 20000-40000Pa·S, and the elastic recovery at 25°C is greater than 90%, The modified asphalt can be used as a transition layer between the cracked structural layer and the asphalt surface layer / asphalt overlay to disperse and absorb the concentrated stress at the tip of the crack, thereby solving the problem of reflective cracks. However, the viscosity of this asphalt And the elasticity is not very good, and it is not convenient to test the performance of the asphalt, and it is not convenient to control the quality of the asphalt, so we propose a high-viscosity and high-elasticity asphalt for seamless expansion joints and its preparation method , to solve the above problem