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Preparation method of rubber asphalt concrete

A technology of rubber asphalt and concrete, which is applied in the field of building materials, can solve the problems of poor crack resistance, limit the large-scale use of rubber asphalt concrete, and insufficient compressive strength of rubber asphalt concrete, and achieve good low-temperature crack resistance, reinforcement and ease of use. and water retention, increasing compactness and impermeability

Active Publication Date: 2016-07-27
CCCC THIRD HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, rubber asphalt concrete still has the problems of insufficient compressive strength and poor crack resistance, which limits the large-scale use of rubber asphalt concrete

Method used

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  • Preparation method of rubber asphalt concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1. In parts by weight, mix 30 parts of Portland cement, 30 parts of mineral powder, 20 parts of fly ash, 10 parts of stainless steel powder and 5 parts of green clay at 180°C, and mix 80 parts Rubber asphalt was added thereto, and the mixture was obtained after stirring at 180° C. for 1 min.

[0032] Step 2: In parts by weight, mix 500 parts of limestone with a particle size of 10mm and 50 parts of blast furnace slag, and then calcine at 500° C. for 20 minutes and cool, then add the limestone and the blast furnace slag to the mixture. After stirring at 180° C. for 4 minutes, add 40 parts of water and 40 parts of high-calcium wastewater, and continue stirring at 180° C. for 2 minutes to obtain a mixture.

[0033] Step 3: pouring the mixture layer by layer, each layer pouring thickness is 15cm, then vibrating, and curing for 5 days in an environment of 15°C to obtain the rubber asphalt concrete.

Embodiment 2

[0035] Step 1. In parts by weight, after fully mixing 50 parts of Portland cement, 50 parts of mineral powder, 40 parts of fly ash, 30 parts of stainless steel powder and 10 parts of green mud at 190 ° C, mix 120 parts Rubber asphalt was added thereto, and the mixture was obtained after stirring at 190° C. for 2 minutes.

[0036] Step 2: In parts by weight, mix 800 parts of limestone with a particle size of 20mm and 100 parts of blast furnace slag, and then calcine at 700° C. for 30 minutes and cool, then add the limestone and the blast furnace slag to the mixture, and After stirring at 190° C. for 8 minutes, add 60 parts of water and 60 parts of high-calcium wastewater, and continue stirring at 190° C. for 4 minutes to obtain a mixture.

[0037] Step 3: pouring the mixture layer by layer, each layer pouring thickness is 25cm, then vibrating, and curing for 10 days in an environment of 25°C to obtain the rubber asphalt concrete.

Embodiment 3

[0039] Step 1. In parts by weight, 40 parts of Portland cement, 40 parts of mineral powder, 30 parts of fly ash, 20 parts of stainless steel powder and 8 parts of green mud are fully stirred and mixed at 185 ° C, and 100 parts Rubber asphalt was added thereto, and the mixture was obtained after stirring for 1 min at 185°C.

[0040] Step 2. In parts by weight, mix 600 parts of limestone with a particle size of 15 mm and 75 parts of blast furnace slag, and then calcine at 600° C. for 25 minutes and cool, then add the limestone and the blast furnace slag to the mixture, and After stirring at 185° C. for 6 minutes, add 50 parts of water and 50 parts of high-calcium wastewater, and continue stirring at 185° C. for 3 minutes to obtain a mixture.

[0041]Step 3: pouring the mixture layer by layer, each layer pouring thickness is 20cm, then vibrating, curing in 20°C for 8 days to obtain the rubber asphalt concrete.

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Abstract

The invention discloses a preparation method of rubber asphalt concrete. The preparation method comprises the following steps of: (I) sufficiently stirring and uniformly mixing portland cement, mineral powder fly ash, stainless steel powder and green mud at 180-190 DEG C; adding rubber asphalt; and stirring at 180-190 DEG C to obtain a mixture; (II) mixing limestone and blast furnace slag; calcining at 500-700 DEG C for 20-30 minutes; cooling; adding limestone and blast furnace slag into the mixture, and stirring at 180-190 DEG C for 4-8 minutes; adding water and high-calcium wastewater; and continuously stirring at 180-190 DEG C for 2-4 minutes to obtain a mixture; and (III) performing layered pouring of the mixture, vibrating and curing at 15-25 DEG C for 5-10day to obtain the rubber asphalt concrete. By adopting the preparation method disclosed by the invention, the compressive strength and crack resistance of the rubber asphalt concrete can be obviously enhanced.

Description

technical field [0001] The invention relates to the field of building materials. More specifically, the present invention relates to a method for preparing rubberized asphalt concrete. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Asphalt concrete is generally composed of asphalt and mineral aggregates. In this technical field, the commonly used asphalt is mainly SBS modified asphalt, the commonly used aggregates mainly include limestone, basalt, granite, etc., and the commonly used fillers include limestone ground fine mineral powder, Slaked lime, cement, etc. [0003] Rubber asphalt refers to the modified asphalt binder obtained by swelling reaction of tire rubber powder with a content of more than 15% and asphalt under high temperature and sufficient mixing conditions. After swelling, the volume ratio of rubber particles can reach 40%. Rubber asphalt a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/28C04B14/34C04B18/04C04B18/08C04B18/14C04B18/22C04B24/36C04B24/02C04B24/04
CPCC04B28/04C04B40/0039C04B18/141C04B18/08C04B14/34C04B18/0418C04B14/28C04B18/142C04B40/0028C04B18/22C04B24/02C04B24/04C04B24/2611C04B26/26Y02W30/91
Inventor 刘元炜侯权河肖丰涛刘宇峰
Owner CCCC THIRD HIGHWAY ENG
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