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Method for wet modification of emulsified asphalt with nano-clay/styrene butadiene rubber

A technology for emulsified asphalt and nanoclay, applied in building components, building insulation materials, construction and other directions, can solve the problems of poor storage stability, difficult to mix evenly, etc., and achieve the effects of stable performance, improved storage stability, and easy operation of the process.

Active Publication Date: 2016-04-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified emulsified asphalt prepared by the invention overcomes the disadvantages of traditional modified emulsified asphalt such as difficulty in mixing evenly and poor storage stability

Method used

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  • Method for wet modification of emulsified asphalt with nano-clay/styrene butadiene rubber
  • Method for wet modification of emulsified asphalt with nano-clay/styrene butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 0.5g of emulsifier, add 99.5g of water, and dissolve it completely in a water bath at 60°C to obtain an emulsified soap with a solid content of 0.5%, wherein the compound mass ratio of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether It is 1:0.5. Take 100g of emulsified soap with a solid content of 0.5% and add it to 200g of No. 70 base asphalt at a temperature of 120°C, and emulsify in an emulsifier at 200r / min for 1min to obtain emulsified asphalt. Get 5g montmorillonite, add 95g water, obtain the clay suspension that solid content is 5% after stirring and mixing, get 100g solid content and be that 5% clay suspension is added to 100g mass fraction and be that the styrene-butadiene latex of 20% mixes evenly to obtain Nano clay / styrene butadiene rubber blend. Take 15g of nanoclay / styrene-butadiene rubber blend and mix with 300g of emulsified asphalt, and shear it for 3min at a speed of 300r / min in a high-speed shearing machine to obtain nanocla...

Embodiment 2

[0025] Take 20g of emulsifier, add 180g of water, and dissolve it completely in a water bath at 80°C to obtain an emulsified soap with a solid content of 10%, in which the compound mass ratio of sodium lauryl sulfate and alkylphenol polyoxyethylene ether is 1:5 . Take 200g of emulsified soap with a solid content of 10% and add it to 200g of No. 90 base asphalt at a temperature of 150°C, and emulsify in a 700r / min emulsifier for 5min to obtain emulsified asphalt. Get 20g kaolin, add 80g water, obtain the clay suspension that solid content is 20% after stirring and mixing, get 100g solid content and be that 20% clay suspension joins in 125g mass fraction and be that the styrene-butadiene latex of 20% mixes homogeneously to obtain nanoclay / SBR blend. Take 80g of nanoclay / styrene-butadiene rubber blend and mix with 400g of emulsified asphalt, and shear it for 10min at a speed of 700r / min in a high-speed shearing machine to obtain nanoclay / styrene-butadiene rubber-modified emuls...

Embodiment 3

[0027] Take 3g of emulsifier, add 147g of water, and dissolve it completely in a water bath at 70°C to obtain an emulsified soap with a solid content of 2%, in which the compound mass ratio of sodium lauryl sulfate and alkylphenol polyoxyethylene ether is 1:2 . Take 150g of emulsified soap with a solid content of 2% and add it to 200g of No. 90 base asphalt at a temperature of 130°C, and emulsify in a 400r / min emulsifier for 3min to obtain emulsified asphalt. Get 15g silica, add 85g water, obtain the clay suspension that solid content is 15% after stirring and mixing, get 100g solid content and be that 15% clay suspension joins in 225g mass fraction and be that the styrene-butadiene latex of 20% mixes homogeneously to obtain nanoclay / SBR blend. Take 50g of nanoclay / styrene-butadiene rubber blend and mix with 350g of emulsified asphalt, and shear it for 6min at a speed of 400r / min in a high-speed shearing machine to obtain nanoclay / styrene-butadiene rubber modified emulsifie...

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Abstract

The invention relates to a method for wet modification of emulsified asphalt with nano-clay / styrene butadiene rubber and belongs to the technical field of road asphalt. Matrix asphalt and an emulsifier are mixed to form emulsified asphalt, emulsified asphalt is modified with a modifier prepared from nano-clay and styrene-butadiene latex through high-speed stirring, a high-speed shearing machine is used as dispersion equipment, and the specific preparation process comprises emulsion blending and shearing mixing. The prepared modified emulsified asphalt overcomes defects that traditional modified emulsified asphalt is not easy to mix uniformly, poor in storage stability and the like. The preparation method is good in feasibility and easy to operate, has the simple technology and has the good application effect and practical value.

Description

technical field [0001] The invention relates to the technical field of road asphalt, in particular to a method for wet modification of emulsified asphalt. Background technique [0002] Since the 1990s, China has entered a period of rapid development of highway construction. By the end of 2014, the total mileage of national highways reached 4.4639 million kilometers, including 111,900 kilometers of expressways. In 2020, an overall layout of national highways with "five verticals and seven horizontals" will be formed. Highway construction will promote the development of national economic construction. [0003] The service performance of the pavement is an important guarantee for the function of the road. Not only should high-quality new pavement be built, but also the pavement in use should be repaired and maintained in time to improve the service performance of the existing pavement. The demand for road construction and maintenance funds is increasing, so looking for an asph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L9/08C08K3/34C08K3/36C08J3/03
CPCC08J3/03C08J2395/00C08J2409/08C08K2201/011C08K2201/014C08L95/00C08L2201/54C08L2205/025C08L9/08C08K3/346C08K3/36
Inventor 李晓林包慧敏王益庆郑广宇沈家锋张立群
Owner BEIJING UNIV OF CHEM TECH
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