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A heat-resistant recycled asphalt concrete and its preparation method

A technology for recycling asphalt and concrete, applied in the field of highway engineering, can solve the problems of poor temperature stability of asphalt pavement, affecting the service life of asphalt pavement, easy absorption of heat and melting of asphalt pavement, etc. Good thermal insulation effect

Active Publication Date: 2021-06-08
江苏盛达飞建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing fiber composite recycled asphalt concrete adopts coarse-grained asphalt concrete, increases the particle size of the aggregate, and adds glass fiber to increase the tensile and crack resistance of the mixture. However, due to the poor temperature stability of the asphalt pavement, the The temperature is high and the sunshine is sufficient. The asphalt pavement is easy to absorb heat and melt, resulting in a decrease in strength. After the vehicle is run over, the asphalt pavement will be uneven and affect the service life of the asphalt pavement.

Method used

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  • A heat-resistant recycled asphalt concrete and its preparation method
  • A heat-resistant recycled asphalt concrete and its preparation method
  • A heat-resistant recycled asphalt concrete and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-3

[0043] Tung oil in Preparation Example 1-3 is selected from lc-0001 type tung oil sold by Shandong Greentown Chemical Co., Ltd., and turpentine is selected from AOX-68 type turpentine sold by Jinan Aoxiang Chemical Co., Ltd., and naphthenic rubber oil is selected from Shanghai Judao Chemical Co., Ltd. The KN4010 naphthenic rubber oil and alkylated diphenylamine antioxidant sold by the company are selected from the T534 alkylated diphenylamine antioxidant sold by Jinzhou Shengda Chemical Co., Ltd. The YH-801 SBS modifier and UV absorber sold by Jiang Shengbang Plastic Raw Materials Management Department are selected from the UV-531 UV absorber sold by Dongguan Kangjin New Material Technology Co., Ltd., and the styrene-butadiene rubber powder is selected from Beijing Yuda Industrial Co., Ltd. The YDH-SBR styrene-butadiene rubber powder and hollow glass microspheres sold by Trading Co., Ltd. are selected from the hollow glass microspheres sold by Fengheng Mineral Products Processi...

preparation example 1

[0044] Preparation Example 1: According to the proportioning in Table 1, (1) 80kg base oil, 10kg surfactant and 10kg dispersant were added to the reactor, heated to 150°C, stirred at 1000r / min for 20min, and stirred evenly, wherein The base oil is a mixture of tung oil, turpentine and rubber oil with a mass ratio of 2:1:3, the rubber oil is naphthenic rubber oil, the surfactant is cetyltrimethylammonium chloride, and the dispersant is mass A mixture of stearylamide and n-butanol at a ratio of 0.5:15;

[0045] (2) Stir 10kg of styrene-butadiene rubber powder and 5kg of hollow glass microspheres at a speed of 500r / min for 30min, add them to the reactor, then add 0.1kg of dicumyl peroxide and 10kg of absolute ethanol to the reactor At 140°C, stir at 800r / min for 30min, and add 0.5kg of dichloromethane, 0.5kg of SBS modifier, 10kg of ultraviolet absorber and 1.0kg of alkylated diphenylamine anti-oxidant when it is naturally cooled to 60°C. Oxygen agent, continue to stir for 30 mi...

preparation example 2

[0049] Preparation Example 2: According to the proportioning in Table 1, (1) 90kg of base oil, 13kg of surfactant and 15kg of dispersant were added to the reactor, heated to 160°C, stirred at 1300r / min for 25min, and stirred evenly, wherein The base oil is a mixture of tung oil, turpentine and rubber oil with a mass ratio of 3:1.3:4, the rubber oil is naphthenic rubber oil, the surfactant is octadecyltrimethylammonium chloride, and the dispersant is mass A mixture of stearylamide and n-butanol at a ratio of 0.8:18;

[0050] (2) Stir 15kg of styrene-butadiene rubber powder and 8kg of hollow glass microspheres at a rotating speed of 700r / min for 35min, add them to the reactor, then add 0.3kg of dicumyl peroxide and 15kg of absolute ethanol to the reactor At 160°C, stir at 900r / min for 40min, and add 1.0kg of dichloromethane, 1.0kg of SBS modifier, 20kg of ultraviolet absorber and 3.0kg of alkylated diphenylamine anti-oxidant when naturally cooling to 70°C. Oxygen agent, continu...

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Abstract

The invention discloses a heat-resistant recycled asphalt concrete and a preparation method thereof. Heat-resistant recycled asphalt concrete includes the following components: new asphalt, RAP material, regeneration agent, steel slag, ceramic powder, mineral powder, new aggregate, silica, glass fiber; regeneration agent includes the following components: base oil, dispersant , alkylated diphenylamine antioxidant, methylene chloride, ultraviolet absorber, dicumyl peroxide, surfactant, SBS modifier, absolute ethanol, styrene-butadiene rubber powder, hollow glass microspheres; its preparation The method is: S1, collecting the RAP material; S2, preparing the first mixture; S3, preparing the second mixture; S4, preparing the third mixture; S5, preparing the finished product. The heat-resistant recycled asphalt concrete of the invention has excellent crack resistance, durability, high temperature resistance and rutting resistance; in addition, the preparation method of the invention has the advantage of uniform distribution of asphalt.

Description

technical field [0001] The invention relates to the technical field of highway engineering, more specifically, it relates to a heat-resistant recycled asphalt concrete and a preparation method thereof. Background technique [0002] With the development of the national economy and highway transportation, the proportion of large freight vehicles in the transportation vehicles is increasing, and the traffic volume is increasing year by year. In addition, there are generally phenomena of vehicle overloading and overrunning. Under the repeated action of the vehicle load, the mixture will be sheared and damaged at the edge of the wheel, and the asphalt surface will produce irreversible residual deformation and accumulate rapidly, or crack and gradually expand, resulting in rutting and fatigue in the structural layer. The road has caused serious impacts, resulting in early damage to the pavement, greatly shortening the service life, and accelerating the degradation of pavement perf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B111/20C04B111/28
Inventor 时兆武
Owner 江苏盛达飞建筑材料有限公司
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