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Ultra-microbubble additive for warm mix asphalt mixture as well as preparation and application methods of additive

An asphalt mixture and additive technology, applied in the field of composite materials in the field of road engineering, can solve the problems of exhaust gas and dust emission, asphalt aging, etc., and achieve the effect of reducing energy and pollutant emissions, reducing compaction temperature and good crystallinity

Active Publication Date: 2019-07-05
张燕军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the high mixing and compacting temperature of SBS modified asphalt, which may easily cause asphalt aging, exhaust gas and dust emissions, this patent provides an ultra-micro-bubble warm mix asphalt mixture additive and its preparation and use method

Method used

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  • Ultra-microbubble additive for warm mix asphalt mixture as well as preparation and application methods of additive
  • Ultra-microbubble additive for warm mix asphalt mixture as well as preparation and application methods of additive
  • Ultra-microbubble additive for warm mix asphalt mixture as well as preparation and application methods of additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix bauxite, sodium carbonate and lime with a mass ratio of 1:1:2 to obtain a mixture, sinter at 1200°C to make clinker, and then use an alkali solution with a mass concentration of 2% to dissolve the clinker Metal oxide, and add the purifying agent of 50g / L to obtain parent solution;

[0027] The mass ratio of described lye and mixed material is 1:1;

[0028] (2) Add the matrix solution and water glass to the reaction vessel synchronously, adjust the reaction temperature to 50°C, stir at a rate of 300 rpm, and stir for 45 minutes to form gel; the mass ratio of the amount of water glass added to the mixed material is 1 :3;

[0029] (3) Add an adhesive and a directing agent to the glue described in step (2), and put it in a constant temperature water bath at 68°C for 2.5 hours to crystallize it;

[0030] (4) Liquid-solid separation, washing, dilute drying at 180°C for 30 minutes, grinding, and adding a dispersant; the prepared ultra-microbubble warm mix asphalt mix...

Embodiment 2

[0033] (1) Mix bentonite, sodium carbonate and lime with a mass ratio of 1:1:2 to obtain a mixed material, sinter at 1300°C to make clinker, and then use an alkali solution with a mass concentration of 2% to dissolve the metal oxide in the clinker Thing, and the purifying agent that adds 50g / L obtains parent solution;

[0034] The mass ratio of described lye and mixed material is 1:1;

[0035] (2) Add the matrix solution and water glass to the reaction vessel synchronously, adjust the reaction temperature to 40°C, stir at a rate of 300rpm, and stir for 35 minutes to form a gel; the mass ratio of the amount of water glass added to the mixed material is 1 :5;

[0036] (3) Add an adhesive and a directing agent to the glue described in step (2), and put it in a constant temperature water bath at 70°C for 2 hours to crystallize it;

[0037] (4) Liquid-solid separation, washing, dilute drying at 180°C for 30 minutes, grinding, and adding a dispersant to obtain an additive for supe...

Embodiment 3

[0040] (1) Mix kaolin, sodium carbonate and lime with a mass ratio of 1:1:2 to obtain a mixed material, sinter at 1250°C to make clinker, and then use an alkali solution with a mass concentration of 2% to dissolve the metal oxide in the clinker Thing, and the purifying agent that adds 50g / L obtains parent solution;

[0041] The mass ratio of described lye and mixed material is 1:1;

[0042] (2) Add the matrix solution and water glass to the reaction vessel synchronously, adjust the reaction temperature to 60°C, stir at a rate of 300 rpm, and stir for 50 minutes to form a gel; the mass ratio of the amount of water glass added to the mixed material is 1 :1;

[0043] (3) Add an adhesive and a directing agent to the glue described in step (2), and put it in a constant temperature water bath at 60°C for 3 hours to crystallize it;

[0044] (4) Liquid-solid separation, washing, dilute drying at 180°C for 30 minutes, grinding, and adding a dispersant to obtain an additive for superm...

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Abstract

The invention relates to an ultra-microbubble additive for a warm mix asphalt mixture. A preparation method of the additive comprises the following steps: mixing natural minerals, sodium carbonate andlime, performing sintering, dissolving out metal oxides by using an alkali solution, adding a purification agent to obtain a mother solution, synchronously adding the mother solution and water glassinto a reaction vessel, performing slurrying under stirring to form gel, adding an adhesive and a guiding agent, performing thermostatic waterbath for crystallization, performing liquid-solid separation, performing washing, performing drying, performing grinding, and adding a dispersing agent. The finished product provided by the invention has good crystallinity, uniform pores and a low price, thecompaction temperature can be significantly reduced when the addition amount is 0.25 wt%, the road performance of the asphalt mixture is improved, and the additive is high-efficiency and environmentally friendly, and has the effects of modification and reducing warm-mix temperature.

Description

technical field [0001] The invention relates to a composite material in the field of road engineering, in particular to an ultra-microbubble warm-mix asphalt mixture additive and a preparation and use method thereof. Background technique [0002] Ordinary asphalt materials generally have the disadvantages of high penetration, low ductility, and low softening point within the engineering range, which are specifically manifested in the problems of poor compression and crack resistance, poor plasticity, high temperature sensitivity, and narrow working temperature range. Modified asphalt can reduce the thickness of the pavement structure layer, reduce the maintenance cost of the pavement, reduce the low-temperature cracking of the pavement, improve the fatigue performance of the asphalt, strengthen the bonding ability of the asphalt and the aggregate, inhibit the oxidative aging of the asphalt, and improve the healing ability of the crack. Advantages, modified asphalt is getting...

Claims

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Application Information

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IPC IPC(8): C04B22/10C08L95/00C08L53/02C08K3/34
CPCC04B40/0039C08L95/00C08L53/02C08K3/34C04B14/36C04B22/064C04B22/10C04B22/06C04B12/04C04B2103/0068C04B2103/408Y02A30/30
Inventor 张燕军
Owner 张燕军
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