CN1800265A - Waste fiber doped asphalt mixing material and its production method - Google Patents

Abstract

The invention relates to an asphalt mixing material with the waste fiber in traffic bridge circuit project and its producing method. The product formula comprises: waste rubber powder, waste fiber, reinforced agent 18-22, octane rubber 0.5-1.5, styrene -butadiene -styrene block copolymer 4-6 and asphalt 25-31. The preparing craft is that adding the materials into the pressure pan with the stirring apparatus to highly stir them at 180-220 deg., doing inter-reaction at the constant temperature and stirring them into loosing waste fiber asphalt mixing material.

Description

A kind of waste fiber doped asphalt and production method thereof

Technical field

The present invention relates to the material of surfacing in a kind of road and bridge engineering, particularly a kind of waste fiber doped asphalt and production method thereof.

Background technology

High speed development along with economic construction, Modern Traffic has proposed more and more higher requirement for the bituminous pavement construction quality, the disease such as exceed standard of the cracking on road surface and the noise that travels, make traditional asphalt technology can't satisfy the requirement of engineering construction sometimes, increasing type material is entering the bituminous pavement technical field.Wherein fiber generally has been used for the bituminous pavement engineering as a kind of special interpolation material, and normally used fiber mainly is lignin fibre, polypropylene acrylic fibers fiber, trevira etc.In bituminous concrete, play absorption, stable, reinforcement, dispersion viscosifying action.And the anti-low-temperature cracking ability of raising asphalt.

According to the data introduction that can retrieve, it is to cost an arm and a leg that above-mentioned various fiber asphalt compounds do not have the major cause of large-scale popularization, has limited applying of it.Therefore, reducing the application cost of fiber in bituminous concrete is the key that fiber is promoted in the bituminous pavement technical field.The application that fiber is mixed in bituminous concrete so development will be given up has just become the new problem of scientific research.

Summary of the invention

Purpose of the present invention just provides a kind of waste fiber doped asphalt and production method thereof, select scientific and reasonable production technique, use unique formula, increase elasticity, the reduction noise of bituminous concrete pavement, improve the anti-low-temperature cracking ability of bituminous pavement, significantly reduce the price of fiber asphalt concrete.

The object of the present invention is achieved like this: products material and weight part ratio are for example following:

Shoddy 69-75,

Useless fiber 4-8,

Strengthening agent 18-22,

Poly-octene rubber 0.5-1.5,

Styrene-butadiene-styrene block copolymer 4-6,

Pitch 25-31.

Preparation technology of the present invention is as follows: above-mentioned materials is put in proportion in the reactor of whipping appts, carried out high-speed stirring in the time of temperature 170-200 ℃, constant temperature reacts to each other for 190 ℃ then, restir the useless fiber asphalt compound of loose shape.

The present invention is in the useless fiber asphalt compound process of preparation, rubber powder melting under asphalt grouting expanded and mainly concentrates on particle surface, the particulate core remains elastic rubbery body, so increase the elasticity of bituminous concrete, styrene-butadiene-styrene block copolymer and pitch reaction form modifying asphalt to improve the pitch pavement performance; Adding poly-octene rubber (tie up him linking agent) is strengthen various intermolecular interfaces alternate crosslinked, increases the molecule interfacial adhesion, improves the pitch resistance of aging, makes product have premium properties steady in a long-term.Useless fiber plays absorption, stable, reinforcement, the strengthening action of dispersion tackify in bituminous concrete, and the anti-low-temperature cracking ability of raising asphalt.

The present invention compared with prior art has following advantage: use unique formula, adopt corresponding fragmentation and waste fiber doped method, preparation technology is reasonable, make bituminous pavement have the also anti-low-temperature cracking ability of energy noise reduction, raising bituminous pavement of certain elasticity, significantly reduce the build expense, be widely used in the engineering such as traffic laying of roadway.

Embodiment

Products material and weight part ratio are: shoddy 69-75, useless fiber adopt waste tire fiber or waste acrylic fiber 4-8, strengthening agent to adopt light calcium carbonate or carbon black 18-22, poly-octene rubber (tie up him linking agent) 0.5-1.5, styrene-butadiene-styrene block copolymer 4-6, pitch 25-31.

With above-mentioned raw materials by weight ratio put in the reactor of whipping appts, in the time of temperature 170-200 ℃, carried out high-speed stirring 15-20 minute, constant temperature reacts to each other for 190 ℃ then, after 2 hours restir the useless fiber asphalt compound of loose shape.

Claims (2)

1, a kind of waste fiber doped asphalt is characterized in that products material and weight part ratio are for example down:

Shoddy 69-75,

Useless fiber 4-8,

Strengthening agent 18-22,

Poly-octene rubber 0.5-1.5,

Styrene-butadiene-styrene block copolymer 4-6,

Pitch 25-31.

2, a kind of waste fiber doped asphalt production method as claimed in claim 1, it is characterized in that, with raw material by weight ratio put in the reactor of whipping appts, in the time of temperature 170-200 ℃, carry out high-speed stirring, constant temperature reacts to each other for 190 ℃ then, restir the useless fiber asphalt compound of loose shape.