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A kind of nano-cellulose modified SBR emulsified asphalt mist sealing material and its preparation method and application

A technology of nanocellulose and emulsified asphalt, applied in asphalt coatings, coatings, etc., to achieve the effect of improving strength, good fluidity, and improving insufficient strength

Active Publication Date: 2022-05-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no report on the direct use of nanocellulose modified SBR emulsified asphalt in the modification process of fog seal materials

Method used

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  • A kind of nano-cellulose modified SBR emulsified asphalt mist sealing material and its preparation method and application
  • A kind of nano-cellulose modified SBR emulsified asphalt mist sealing material and its preparation method and application
  • A kind of nano-cellulose modified SBR emulsified asphalt mist sealing material and its preparation method and application

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Experimental program
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Embodiment 1

[0031] The modified emulsified asphalt mist sealing material wood pulp nano cellulose of the present embodiment Dosage is 0% (Admixture refers to the percentage of nanocellulose content in pitch).

[0032] Step S1, weighing by mass, 80 parts of deionized water, 4 parts of cetyltrimethylammonium bromide emulsifier and 1 part of sodium carboxymethyl cellulose stabilizer, manual stirring for 5min, and then ultrasonic treatment 10-15min, and finally processed by a high-speed shear mixer for 15-20min to prepare evenly dispersed soap liquid;

[0033] Step S2, weigh by mass parts, heat 120 parts of 70# base asphalt to 135°C, stir and mix with 80 parts of soap liquid and 6 parts of SBR styrene-butadiene rubber, and slowly pour into the colloid mill. The colloid mill was preheated to 90°C, and the emulsion was left standing in the heat exchanger for 1 hour to prepare the SBR emulsified asphalt mist sealing material.

Embodiment 2

[0035] The dosage of wood pulp nanocellulose in the modified emulsified asphalt mist sealing material of this embodiment is 0.5% (the dosage refers to the percentage of nanocellulose content in the asphalt).

[0036] Step S1, weighing by mass, 0.6 parts of wood pulp nanocellulose, 80 parts of deionized water, 4 parts of cetyltrimethylammonium bromide emulsifier and 1 part of sodium carboxymethylcellulose stabilizer, First, manually stir for 5 minutes, then use ultrasonic treatment for 10-15 minutes, and finally process it with a high-speed shear mixer for 15-20 minutes to prepare evenly dispersed soap liquid;

[0037] Step S2, weigh by mass parts, heat 120 parts of 70# base asphalt to 135°C, stir and mix with 80 parts of soap liquid and 6 parts of SBR styrene-butadiene rubber, and slowly pour into the colloid mill. The colloid mill was preheated to 90°C, and the emulsion was left to stand in the heat exchanger for 1 hour to prepare the nanocellulose-modified SBR emulsified asp...

Embodiment 3

[0039] The dosage of wood pulp nanocellulose in the modified emulsified asphalt mist sealing material of this embodiment is 1% (the dosage refers to the percentage of nanocellulose content in the asphalt).

[0040] Step S1, weighing by mass, 1.2 parts of wood pulp nanocellulose, 80 parts of deionized water, 4 parts of cetyltrimethylammonium bromide emulsifier and 1 part of sodium carboxymethylcellulose stabilizer, First, manually stir for 5 minutes, then use ultrasonic treatment for 10-15 minutes, and finally process it with a high-speed shear mixer for 15-20 minutes to prepare evenly dispersed soap liquid;

[0041] Step S2, weigh by mass parts, heat 120 parts of 70# base asphalt to 135°C, stir and mix with 80 parts of soap liquid and 6 parts of SBR styrene-butadiene rubber, and slowly pour into the colloid mill. The colloid mill was preheated to 90°C, and the emulsion was left to stand in the heat exchanger for 1 hour to prepare the nanocellulose-modified SBR emulsified aspha...

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Abstract

The invention relates to a nano-cellulose modified SBR emulsified asphalt mist sealing material and its preparation method and application. The components and parts by weight include: 0.6-1.8 parts of nano-cellulose, 6-7 parts of SBR styrene-butadiene rubber, and 120 parts of asphalt , 1-2 parts of stabilizer, 4-5 parts of emulsifier and 80-90 parts of deionized water. It also discloses the specific preparation process of the modified emulsified asphalt material and applies it to the maintenance of the fog seal layer without sand on the pavement. As a nano-material, nanocellulose has excellent mechanical properties such as high strength and high specific surface area. Modification of emulsified asphalt can significantly improve the anti-rutting performance, fatigue performance and low-temperature performance of the fog seal layer material, and avoid fogging. When the sealant material is applied to pavement maintenance, premature spalling and failure will occur under the continuous action of natural factors and vehicle loads. The mist sealing material prepared by the invention can be widely used in the pre-curing of road surfaces, and the nanocellulose, as an organic natural fiber, has degradability and is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of pavement engineering pre-maintenance. Background technique [0002] Under the continuous action of natural factors (sunshine, temperature, rain) and vehicle loads, asphalt pavement will have early diseases such as microcracks and loose surface aggregates, which seriously affect the driving quality and service life of the pavement, and even cause traffic accidents. Therefore, when there are early diseases on the pavement, it is necessary to carry out preventive maintenance on the pavement in a timely manner. The fog seal layer is one of the common preventive maintenance measures on the pavement, which can effectively prevent the occurrence of early diseases and deal with them in time. Prevent it from expanding further, thereby improving the service life of the road. [0003] Fog sealing technology is the most convenient application in preventive maintenance and the fastest restoration of traffic services....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D195/00C09D7/65C09D7/80
CPCC09D195/00C09D7/65C09D7/80C08L1/02C08L9/06
Inventor 肖飞鹏魏云格徐凌
Owner TONGJI UNIV