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Cation-modified emulsified asphalt for bonding layer and preparation method of cation-modified emulsified asphalt

A cationic emulsifier, emulsified asphalt technology, used in building components, building insulation materials, construction and other directions, can solve the problems of insufficient high-performance emulsified asphalt, difficult emulsification of asphalt, construction impact, etc. Performance improvement, good waterproof effect

Inactive Publication Date: 2013-05-22
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another technique is to make base asphalt into modified asphalt and then emulsify, but generally when the SBS content is greater than 4%, the asphalt is difficult to emulsify
The performance of emulsified asphalt prepared by the above two processes is better than that of ordinary emulsified asphalt, but it still cannot meet the requirements of high-performance emulsified asphalt. Impact

Method used

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  • Cation-modified emulsified asphalt for bonding layer and preparation method of cation-modified emulsified asphalt
  • Cation-modified emulsified asphalt for bonding layer and preparation method of cation-modified emulsified asphalt
  • Cation-modified emulsified asphalt for bonding layer and preparation method of cation-modified emulsified asphalt

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1 is illustrated by taking the preparation of 500g cationic modified emulsified asphalt for adhesive layer as an example:

[0035] First weigh 230g SK90 road petroleum asphalt, then add 9g SBS modifier (linear styrene-butadiene-styrene Block copolymer, the block ratio is 10 / 90-20 / 80, the molecular weight is 80,000-90,000), the asphalt is heated to 160-170°C after mechanical stirring for 40 minutes, and then the modified equipment (shearing machine) Medium shearing for 30 minutes, the speed of the shearing machine is 4000r / min, then cooling to 140-150°C, after cooling, add 0.5g of crosslinking agent (provided by Jinan Zhongjiao Road and Bridge Engineering Co., Ltd., model LZ-STAB-03) , continue shearing for 10 minutes to prepare modified asphalt, and keep the prepared modified asphalt at 140-150° C. for further use. Weigh 245g of water, 7.5g of cationic emulsifier (the cationic emulsifier is the cationic emulsifier DF-62 produced by Medworth Vacc), 1g of calc...

Embodiment 2

[0036] Example 2 is illustrated by taking the preparation of 400g cationic modified emulsified asphalt for adhesive layer as an example

[0037] First weigh 190g of Esso No. 70 road petroleum asphalt, and then add 7g of SBS modifier (linear styrene-butadiene produced by Shell Company) to the Esso No. 70 road petroleum asphalt in the hot melt state (140-150°C). - Styrene block copolymer, block ratio is 10 / 90-20 / 80, molecular weight is 80,000-90,000), after mechanical stirring for 40 minutes, the asphalt is heated to 160-170°C, and then in the modification equipment (shear cutting machine) for 30 minutes, the shearing machine speed is 4000r / min, then cooled to 140 ~ 150 ° C, after cooling, add 0.4g crosslinking agent (provided by Jinan Zhongjiao Road and Bridge Engineering Co., Ltd., model LZ-STAB -03), continue shearing for 10 minutes to prepare modified asphalt, and keep the prepared modified asphalt at 140-150°C for use. Weigh 190g of water, 6g of cationic emulsifier (the ca...

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Abstract

The invention provides cation-modified emulsified asphalt for a bonding layer and a preparation method of the cation-modified emulsified asphalt. The cation-modified emulsified asphalt comprises matrix asphalt, an SBS modifier, an emulsifying agent, water, a PH regulator, an organic stabilizer and an inorganic stabilizer. According to the preparation method of the cation-modified emulsified asphalt, the ratio of the materials and the processing temperature are controlled and the materials are emulsified by using a colloid mill to obtain a finished product by controlling. The prepared emulsified asphalt is low in solid content, excellent in high-low temperature performance, good in elastic recovery, strong in binding performance and good in stability, and softening points and the elastic recovery are both over 70%, which are far higher than the indexes of common emulsified asphalt. By using a special emulsifying agent and a special stabilizer, the modified asphalt can be easily emulsified, and the prepared modified asphalt is high in performance; and compound stabilizers are used, so that the emulsion stability is improved.

Description

technical field [0001] The invention relates to a cation-modified emulsified asphalt for sticky layers for roads and a preparation method thereof. Background technique [0002] my country's "Technical Specifications for Highway Asphalt Pavement Construction" (JTGF40-2004) stipulates: double-layer or three-layer hot-mix hot-paved asphalt mixture pavement between asphalt layers, cement concrete pavement, asphalt stabilized macadam base or old asphalt pavement layer The overlay asphalt layer should be sprinkled with sticky layer oil, and specific regulations are put forward for the index of sticky layer oil. If the viscous layer oil cannot provide good cohesion, it will cause slippage and wrapping between the asphalt pavement layers, which will seriously damage the integrity and structural stress of the pavement, especially in the high temperature season, longitudinal slopes, curves, etc. , this phenomenon is particularly evident. [0003] The foreign research on modified emul...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08J3/24C08J3/03
Inventor 陈华鑫刘洪苏新国鲁圣弟黄学文颜赫李进薛跃武张丰焰管勤曹进许泽宁耿超沈筠李洁景宏伟魏峰蒋卫平贾广平
Owner CHANGAN UNIV
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