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SBS latex modified asphalt mixture and warm-mixing direct-feeding preparation process thereof

A modified asphalt and mixture technology, applied in the field of modified asphalt, can solve problems such as insufficient crosslinking, gel, storage segregation, etc., and achieve the effect of lowering the temperature

Active Publication Date: 2021-09-03
安徽茂诚路桥工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention prepares SBS modified asphalt mixture from ordinary matrix asphalt mixture or regenerated asphalt mixture RAP by directly throwing SBS latex into the mixing tank, so that its road performance can reach the level of JTG F40-2017 and GTB25033-2010 Technical standards, directly realize the two-in-one process of modified asphalt preparation and modified asphalt mixture preparation; solve the aging problems, high pollution problems, gel problems, insufficient crosslinking problems, storage segregation and high temperature of modified asphalt Insulation issues, etc.

Method used

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  • SBS latex modified asphalt mixture and warm-mixing direct-feeding preparation process thereof
  • SBS latex modified asphalt mixture and warm-mixing direct-feeding preparation process thereof
  • SBS latex modified asphalt mixture and warm-mixing direct-feeding preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation of AC-13 Modified Asphalt Mixture with SBS Latex

[0052] (1) Adjust the temperature of the mixing tank of the asphalt mixer to 135°C; heat 5000 grams of aggregate to 150°C and put it into the mixing tank. 2 grams of cross-linking agent was added to 17.5 grams of SBS latex, stirred in a blender for 10 minutes, set aside.

[0053] (2) Heat 245 grams of base asphalt to 140°C, add it into the mixing tank, and stir for 40 seconds.

[0054] (3) Add the SBS latex in step ① into the mixing tank, stir for 180 seconds, and discharge. Molding temperature: 130°C.

[0055] (4) Add mineral powder and stir for 180 seconds.

[0056] Manufacture Marshall test pieces, rut plates, and trabecular test pieces. The test results are as follows:

[0057]

Embodiment 2

[0059] Preparation of AC-16 Modified Asphalt Mixture with SBS Latex

[0060] (1) Adjust the temperature of the mixing tank of the asphalt mixer to 135°C; heat 5000 grams of aggregate to 150°C and put it into the mixing tank. 2 grams of cross-linking agent was added to 22.5 grams of SBS latex, stirred in a stirrer for 10 minutes, set aside.

[0061] (2) Heat 245 grams of machine-made asphalt to 135°C, add it into the mixing tank, and stir for 40 seconds.

[0062] (3) Add the SBS latex in step ① into the mixing tank and stir for 180 seconds.

[0063] (4) Add mineral powder, stir for 180 seconds, discharge, molding temperature: 130°C.

[0064] Manufacture Marshall test pieces, rut plates, and trabecular test pieces. The test results are as follows:

[0065] Test items unit detection specification illustrate Marshall stability KN 19 8 first class road standard Marshall residue ％ 99 80 first class road standard dynamic stability tim...

Embodiment 3

[0067] Preparation of SBS latex direct injection modified asphalt mixture SMA-13

[0068] (1) Adjust the temperature of the mixing tank of the asphalt mixture mixer to 150°C; heat 5000 grams of aggregate to 150°C and put it into the mixing tank. 2 grams of cross-linking agent was added to 26 grams of SBS latex, stirred in a blender for 10 minutes, set aside.

[0069] (2) Heat 330 grams of machine-made asphalt to 140°C, add it into the mixing tank, and stir for 40 seconds.

[0070] (3) Add the SBS latex in step ① into the mixing tank and stir for 180 seconds.

[0071] (4) Add mineral powder and stir for 180 seconds. Discharge, molding temperature: 135°C.

[0072] Manufacture Marshall test pieces, rut plates, and trabecular test pieces. The test results are as follows:

[0073]

[0074]

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Abstract

The invention relates to the technical field of modified asphalt mixtures, in particular to an SBS latex modified asphalt mixture and a warm-mixing direct-feeding preparation process thereof, and the mixture comprises the following components in percentage by mass: 93-96% of primary aggregate, 3-7% of matrix asphalt, 0.3-1.2% of SBS latex and 0.03-0.12% of cross-linking agent. The cross-linking agent is formed by mixing elemental sulfur, a super vulcanization accelerator and organic peroxide. The method comprises the following process steps: firstly, heating aggregate to a certain temperature, putting the aggregate into a stirring cylinder, then spraying a mixed solution of SBS latex and a cross-linking agent into the stirring cylinder under the action of special conveying equipment while adding matrix asphalt, and discharging the product after fully stirring. The SBS latex is directly fed into a mixing cylinder, so that a common matrix asphalt mixture or a warm-mixed (hot-mixed) recycled asphalt mixture is prepared into the SBS modified asphalt mixture; the problems of aging, high pollution, gel, insufficient crosslinking, storage segregation, high-temperature heat preservation and the like of modified asphalt are solved.

Description

technical field [0001] The invention relates to the technical field of modified asphalt, in particular to a SBS latex modified asphalt mixture and a warm-mix direct-injection preparation process thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Most of the pollution of organic nitrogen oxides and asphalt fume on highway asphalt pavement is in the pre-construction field, that is, the pavement paving construction site. Pollutants such as dust and asphalt fumes in the backyard (mixing plant producing hot asphalt mixture factory) have corresponding disposal devices, but the front yard has not been able to dispose of them so far, and can only be allowed to float into th...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/50C04B24/2688C04B22/02C04B24/00C04B24/16C04B18/16C04B18/141Y02A30/30
Inventor 董娟韩飞飞田明坤贾金鹏孙强强韦志明李争
Owner 安徽茂诚路桥工程有限公司
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