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A kind of preparation method of reactive asphalt modifier, modified asphalt and asphalt mixture

A technology of asphalt modifier and modified asphalt, which is used in building thermal insulation materials, climate change adaptation, building components, etc. It can solve the problems of separation of asphalt and modifier, affecting the performance of modified asphalt, energy consumption and time consumption. , to achieve the effect of reducing pavement maintenance, improving impact resistance and reducing energy consumption

Active Publication Date: 2019-09-17
SHANGHAI KNP CHEM +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But whether it is SBS or other polymer modifiers and asphalt, it is a physical change, and there is some adsorption. In particular, SBS is a non-polar compound with high viscosity and is easy to concentrate on the upper part, while asphalt sinks in the upper part. In the lower part, even if a stabilizer is used, the segregation between the two phases is very easy to occur, which makes the asphalt and the modifier separate, which greatly affects the performance of the modified asphalt
[0005] At the same time, the dissolution of SBS in asphalt needs to go through three stages of swelling, grinding, and further development. It needs to be ground 3-6 times by colloid mill. Because SBS has a high melting point, it needs 170-180°C to swell and dissolve. It also consumes a lot of energy and time, and the base asphalt is prone to aging at high temperatures, which will also affect its performance

Method used

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  • A kind of preparation method of reactive asphalt modifier, modified asphalt and asphalt mixture
  • A kind of preparation method of reactive asphalt modifier, modified asphalt and asphalt mixture
  • A kind of preparation method of reactive asphalt modifier, modified asphalt and asphalt mixture

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preparation example Construction

[0026] The invention provides a preparation method of reactive modified asphalt, comprising the steps of:

[0027] (1) Precisely measure coumarone resin, rosin resin and flexible unsaturated polyester into the reactor, heat to 140-150°C, stir for 15 minutes, then add low-temperature modifier, continue stirring for 15 minutes, cool down to 50°C, and Component A is obtained by granulation;

[0028] (2) Put glycerol into the reaction kettle and turn on the stirring device, and add diethylhexyl peroxydicarbonate, dibenzoyl peroxide, and azobisisobutyronitrile respectively, stir for 15 minutes, and control the temperature at 20- 40°C, to obtain component B;

[0029] (3) Mix component A of the reactive asphalt modifier obtained in step (1) with base asphalt at 130-140°C and stir for 15-20 minutes, then add the reactive asphalt obtained in step (2) Component B of the modifier is uniformly stirred at 130-140°C for 10-20 minutes to obtain reactive modified asphalt.

[0030] Componen...

Embodiment 1

[0038] Preparation of reactive modified asphalt (take the preparation of 100kg of reactive modified asphalt component A, 100kg of reactive modified asphalt component B, and one ton of reactive modified asphalt as a standard example):

[0039] (1) Heat 40kg of coumarone resin, 20kg of rosin resin, and 35kg of linseed oil-type unsaturated polyester to 140°C respectively, put them into the reaction kettle according to accurate measurement, and keep stirring for 15 minutes. Add 5kg of low molecular weight polyethylene and keep stirring for 15 minutes. Cool down to below 50°C, granulate for later use; wherein, the above-mentioned maintenance stirring speed is: rotation 75±5 revolutions / minute, revolution 45±5 revolutions / minute; stirring temperature: when the material is stirred, the temperature is maintained at 140-150°C.

[0040] (2) Put 30kg of glycerol into the reaction kettle, put in 20kg of diethylhexyl peroxydicarbonate, 20kg of dibenzoyl peroxide, and 30kg of azobisisobutyr...

Embodiment 2

[0047] Preparation of reactive modified asphalt (take the preparation of 100kg of reactive modified asphalt component A, 100kg of reactive modified asphalt component B, and one ton of reactive modified asphalt as a standard example):

[0048] (1) Heat 20kg of coumarone resin, 40kg of rosin resin, and 39kg of dicyclopentadiene-modified unsaturated polyester to 140°C respectively, put them into the reaction kettle according to precise measurement, and keep stirring for 15 minutes. 1 kg of aliphatic hydrocarbon resin was added and stirring was maintained for 15 minutes. Cool down to below 50°C, granulate for later use; wherein, the above-mentioned maintenance stirring speed is: rotation 75±5 revolutions / minute, revolution 45±5 revolutions / minute; stirring temperature: when the material is stirred, the temperature is maintained at 140-150°C.

[0049] (2) Put 15kg of glycerol into the reaction kettle, put in 30kg of diethylhexyl peroxydicarbonate, 30kg of dibenzoyl peroxide, and 25...

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Abstract

The invention discloses a reactive asphalt modifier which comprises a component A and a component B. the component A is mainly prepared from the following raw materials (by weight): 20-40 parts of coumarone resin, 20-40 parts of rosin resin, 30-60 parts of flexible unsaturated polyester and 1-5 parts of a low-temperature modifier. The component B is mainly prepared from the following raw materials (by weight): 10-30 parts of diethylhexyl peroxydicarbonate, 10-30 parts of dibenzoyl peroxide, 10-30 parts of azodiisobutyronitrile and 15-30 parts of glycerol. By the use of the reactive asphalt modifier, problems of asphalt ageing and high energy consumption and poor dissolving-swelling which are caused by conventional modifiers are avoided, and impact resistance, anti-cracking property and abrasion resistance of pavements are effectively enhanced. In addition, the invention also provides reactive modified asphalt prepared from the reactive asphalt modifier and a preparation method of an asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of road asphalt, in particular to a reactive asphalt modifier and a preparation method for the reactive modified asphalt. Background technique [0002] With the rapid growth of traffic volume and large-scale vehicles brought about by the high-speed development of the national economy, many asphalt pavements cannot meet the needs even if they use heavy-duty road petroleum asphalt or imported asphalt that meets the requirements, rutting, cracking, brittle potholes, etc. Diseases seriously affect the service life of asphalt pavement. [0003] With the continuous development of science and technology, modified asphalt has comprehensively improved the road performance of asphalt, and some excellent asphalt additives such as SBS and other asphalt additives have emerged. [0004] But whether it is SBS or other polymer modifiers and asphalt, it is a physical change, and there is some adsorption. In particular, SBS ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L45/02C08L93/04C08L67/06C08L23/06C08L23/12C08K5/053C08K5/14C08K5/23C04B26/26
CPCY02A30/30
Inventor 崔秀峰张健金晓东郑炜张杰何唯平
Owner SHANGHAI KNP CHEM
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