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Modified bituminous mixture and preparation method thereof

A technology of modified asphalt and mixture, which is applied in the field of road engineering, which can solve the problems of high temperature of mixture mixing, discharging, and compaction, and achieve the effects of lowering heating temperature, reducing environmental pollution, and improving steady state

Inactive Publication Date: 2014-04-30
姚华彦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high temperature of mixture mixing, discharging and compaction existing in the preparation process of existing hot mix asphalt mixture, the present invention provides a modified asphalt mixture and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of admixtures:

[0022] Raw material and quality of external admixture: 600.0g (60%) of water, 150.0g (15%) of octadecyl dimethyl ammonium bromide, 100.0g (10%) of calcium chloride, SBS (styrene-butylene ethylene-styrene block copolymer) latex 150.0g (15%); the solid content of SBS latex is 35-50%; the water is heated to 50 ℃ ~ 80 ℃, add octadecyl dimethyl ammonium bromide Dissolve, then add calcium chloride and SBS latex, grind to form a mixed solution through a colloid mill, cool for later use.

[0023] Preparation of modified asphalt mixture:

[0024] Raw materials and quality of modified asphalt mixture: aggregate 1126.8g (92%), ordinary asphalt 49.0g (4%), external admixture 36.7g (3%), mineral powder 12.2g (1%); The material is the stone that meets the technical requirements of "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004), the ordinary asphalt is heavy traffic petroleum asphalt, and the mineral powder is the ...

Embodiment 2

[0033] Preparation of admixtures:

[0034] Raw materials and quality of external additives: 600.0g (60%) of water, 150.0g (15%) of octadecyldimethylammonium bromide, 100.0g (10%) of calcium chloride, SBR (butadiene-benzene Ethylene copolymer) latex 150.0g (15%). The solid content of SBR latex is 35-50%; the water is heated to 60°C, octadecyl dimethyl ammonium bromide is added to dissolve, then calcium chloride and SBS latex are added, and a mixed solution is formed after colloid mill grinding. Let cool and set aside.

[0035] Preparation of modified asphalt mixture:

[0036] Raw materials and quality of modified asphalt mixture: aggregate 1123.5g (92%), ordinary asphalt 51.3g (4.2%), external admixture 24.4g (2%), mineral powder 22.0g (1.8%); The material is the stone that meets the technical requirements of "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004), the ordinary asphalt is heavy traffic petroleum asphalt, and the mineral powder ...

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Abstract

The invention relates to a modified bituminous mixture and a method for preparing the modified bituminous mixture. The modified bituminous mixture contains aggregate, common asphalt, an additive and mineral powder, wherein the additive contains water, a cationic surface active agent, a stabilizer and a modifier. The method comprises the following steps: firstly, heating water, adding the cationic surface active agent to dissolve, and then adding the modifier and the stabilizer; grinding by a colloid mill to form the additive; heating the aggregate to 140-160 DEG C, adding to a mixing cylinder to mix for 30 seconds; simultaneously adding the common asphalt heated to 120-140 DEGC and the weighed additive to the mixing cylinder, and then stirring for 40-60 seconds; and adding the cement or the mineral powder to the mixing cylinder to mix for 30-60 seconds, and discharging at 100-120 DEG C, so as to obtain the modified bituminous mixture, wherein the compact molding temperature is 90-110 DEG C. By adopting the modified bituminous mixture, energy source consumption and environmental pollution are reduced, the performance of the asphalt mixture is improved, the modified bituminous mixture can adapt to the requirements of a low-temperature construction technology, and the technology is relatively simple.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a modified asphalt mixture and a preparation method thereof. Background technique [0002] At present, road asphalt mixture and dam core wall asphalt mixture mainly adopt the method of producing modified asphalt first, and then using modified asphalt to heat mix to produce modified asphalt concrete. Hot mix asphalt mixture has excellent performance and mature construction technology. However, during the production process, the mixing and construction temperature of the mixture is quite high, generally at 160-180°C. The harmful gas released by asphalt at high temperature seriously damages the health of construction workers. At the same time, in order to ensure the quality of pavement construction, the minimum paving temperature of traditional hot mix asphalt mixture is strictly limited, so its construction season is restricted. On the other hand, the traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B14/02
Inventor 姚华彦朱朝辉刘杨军
Owner 姚华彦
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