Adhesive layer emulsified asphalt and preparation method thereof

Abstract

The invention relates to an adhesive layer emulsified asphalt and a preparation method thereof. The emulsified asphalt comprises the following components in percentage by weight: 40%-60% of low mark number asphalt, 0-3% of an emulsification promoting additive, 0-3% of a modifier, 0.2%-2% of an asphalt emulsifier, 0.2%-2% of an acid-base modifier and the balance of water. The preparation method comprises the following steps: firstly preparing two intermediate materials, namely easily emulsified and modified low mark number asphalt and liquid soap, and then performing high-speed grinding on the intermediate materials to form unsteady emulsified asphalt; finally performing constant-temperature stirring on the unsteady emulsified asphalt to obtain the adhesive layer emulsified asphalt. The adhesive layer emulsified asphalt has the benefits of high demulsification speed and quick forming, and thus the construction efficiency is greatly improved; the adhesive layer emulsified asphalt is of a non-sticking characteristic, the damage of construction equipment and transport vehicles to an adhesive layer material is avoided, the adhesive efficiency and adhesive strength are improved, and thus the durability of road surfaces is improved; the asphalt is high in high temperature performance; meanwhile, the technology is simple and practical, and is beneficial to popularization and application.

Description

[0001] technical field

[0002] The invention relates to the field of road materials, in particular to a fast-setting, non-sticky emulsified asphalt used for bonding layers between structural layers in newly built or maintained road surfaces and a preparation method thereof. Background technique

[0003] In road construction and maintenance projects, the process of spreading sticky layer materials is usually used between adjacent structural layers to promote the formation of an overall stressed structure between layers, thereby reducing the damage caused by traffic loads such as shifting and hugging of inter-layer structures . The interlayer bonding strength and anti-skid ability provided by the adhesive layer material can bond the interlayers of the pavement structure into a whole and improve the durability of the pavement.

[0004] However, in the actual construction process, the existing sticky layer materials have slow demulsification speed and slow formation of strengt...

Images