Rubber powder modified emulsified asphalt and preparation method thereof and CA mortar prepared by emulsified asphalt

A technology of emulsified asphalt and rubber powder, used in modified emulsified asphalt, rubber powder modified emulsified asphalt, rubber powder modified emulsified asphalt used in the field of CA mortar for high-speed railway or light rail slab trackless track, can solve the problem of CA Mortar performance requirements, short storage time, easy bleeding and segregation of CA mortar, etc., to achieve excellent temperature adaptability and workability, high early strength, and eliminate adverse effects.

Inactive Publication Date: 2011-01-19
江苏省苏安能节能建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these rubber powder modified asphalt still cannot meet the performance requirements of CA morta

Method used

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  • Rubber powder modified emulsified asphalt and preparation method thereof and CA mortar prepared by emulsified asphalt
  • Rubber powder modified emulsified asphalt and preparation method thereof and CA mortar prepared by emulsified asphalt
  • Rubber powder modified emulsified asphalt and preparation method thereof and CA mortar prepared by emulsified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to Embodiment 6

[0055] The preparation method of embodiment 1 to embodiment 6 modified emulsified asphalt is as follows:

[0056] (1) Assuming the measured coupling agent and 1 / 3 of the diluted dispersant in the rubber powder, stir at 120°C for 1 hour;

[0057] (2) Heat the asphalt to 160-230°C, add the remaining amount of diluting dispersant, then add the modified rubber powder prepared in (1), and stir at this temperature for 2-4 hours;

[0058] (3) Add hot water (75-85°C) to the measured emulsifier and emulsification aid, and stir fully to prepare an emulsifier solution;

[0059] (4) Add the emulsifier solution and the metered thickener quickly to the rubber powder modified asphalt prepared in (2), and use a high-shear mixer to shear at high speed for 60-180 seconds.

[0060] The rubber powder modified emulsified asphalt prepared in Examples 1 to 6 was used to prepare CA mortar, and in Examples 7 to 12. The mixing ratio of CA mortar in each example is shown in Table 2.

[0061] Table 2: ...

Embodiment 7 to Embodiment 12

[0063] The preparation method of CA mortar in embodiment 7 to embodiment 12 is as follows:

[0064] (1) Add rubber powder modified emulsified asphalt into the mixer, and stir at a low speed (30-40rpm);

[0065] (2) Add water and water reducer in sequence, and continue stirring at low speed (30-40rpm) for 5-25 seconds;

[0066] (3) Add cement, composite expansion agent, sand and polypropylene fiber, gradually increase the stirring speed to 200rpm-600rpm, and keep stirring for 30-90 seconds.

[0067] (4) Add defoamer and stir at low speed for 5-20 seconds to obtain CA mortar product.

[0068] According to the test method stipulated in the "Code for Design of Railway Tracks" (TB10082-2005), the performance of the CA mortar was measured, and the performance indicators of the CA mortar in Examples 7 to 12 are shown in Table 3.

[0069] It can be seen from the above specific examples and various data tables that the present invention solves the compatibility between rubber powder ...

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PUM

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Abstract

The invention provides rubber powder modified emulsified asphalt and a preparation method thereof and CA mortar prepared by the emulsified asphalt. The rubber powder modified emulsified asphalt is prepared from 30-50% of base asphalt, 15-30% of rubber powder, 0.5-3.0% of coupling agent, 0.2-0.5% of thickening agent, 0.5-3% of diluting dispersing agent, 2.0-6.0% of emulsifying agent, 0.5-3% of emulsifying auxiliary by mass and the balance water through the steps of diluting, stirring and shearing. The CA mortar can be further prepared by adding cement, sand, a compound expansion agent, an air entraining and water-reducing agent, polypropylene fibers, a defoaming agent and other substances to the rubber powder modified emulsified asphalt. The invention solves the technical problem that the rubber powder is difficult to emulsify. The prepared rubber powder modified emulsified asphalt has high dispersibility and stability and the high/low temperature performance and the weatherability of the asphalt are improved. The prepared CA mortar not only has higher elasticity but also does not produce segregation and the storage stability of the CA mortar is obviously improved.

Description

technical field [0001] The invention relates to a modified emulsified asphalt, in particular to a rubber powder modified emulsified asphalt, more specifically to CA mortar using rubber powder modified emulsified asphalt for high-speed railway or light rail slab-type non-chamber track, belonging to the field of building materials . Background technique [0002] Slab-type non-chamber track is the main structural form of high-speed railway or light rail track. CA mortar (also known as cement asphalt mortar), as a key component of slab-type non-chamber track, plays a role of stability and buffer during train operation. It is a non-chamber track structure The key component of the elastic adjustment layer, the main functions are filling, supporting, bearing, transmitting and providing proper elasticity. [0003] CA mortar is usually made by mixing cement, fine aggregate, active additives, emulsified asphalt and water at room temperature. The three-dimensional network structure i...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L17/00C08J3/03C04B28/00
Inventor 龚雁
Owner 江苏省苏安能节能建材科技有限公司
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