Warm mixing shape memory alloy (SMA) asphalt mixture and preparation method thereof

A technology of asphalt mixture and mixture, which is applied in the direction of climate change adaptation, etc., can solve the problem that SMA asphalt mixture is not easy to be compacted, and achieve the effects of easy storage production, extended transportation distance, and convenient addition.

Inactive Publication Date: 2012-11-28
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to achieve the purpose of warm-mixing SMA asphalt and solve the problem that SMA asphalt mixture is not easy to compact, the invention provides a kind of warm-mix SMA asphalt mixture and its preparation method. The warm-mix SMA asphalt mixture effectively reduces the mixing of SMA asphalt Temperature, for this reason the present invention adopts following technical scheme:

Method used

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  • Warm mixing shape memory alloy (SMA) asphalt mixture and preparation method thereof
  • Warm mixing shape memory alloy (SMA) asphalt mixture and preparation method thereof
  • Warm mixing shape memory alloy (SMA) asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 9509g of aggregate, heat it to 145°C and dry it, add it to the mixing pot, keep the temperature in the mixing pot at 140°C, take 594g of SBS modified asphalt and heat it to 165°C, add it to the mixing pot, sprinkle 31.5g of warm mix agent on For the surface of SBS modified asphalt, stir in the mixing pot for 135s, add 396g of mineral powder and 10.5g of fiber into the mixing pot, and stir for 90s, wherein 25% of its weight in the mineral powder is slaked lime, mix the mixed The material is taken out of the pot at 135°C and molded at 125°C to obtain warm mix SMA asphalt mixture.

Embodiment 2

[0030] Take 8750g of aggregates, heat them to 140°C and dry them, add them to the mixing pot, keep the temperature in the mixing pot at 135°C, take 778g of SBS modified asphalt, heat them to 155°C, add them to the mixing pot, sprinkle 31.5g of warm mix agent on For the surface of SBS modified asphalt, stir in the mixing pot for 120s, add 972g of mineral powder and 31.5g of fiber into the mixing pot, stir for 83s, take the mixed material out of the pot at 130°C, and shape it at 115°C , to obtain warm mix SMA asphalt mixture.

Embodiment 3

[0032] Take 10201g of aggregate, heat it to 146°C and dry it, add it to the mixing pot, keep the temperature in the mixing pot at 136°C, take 638g of SBS modified asphalt and heat it to 170°C, add it to the mixing pot, sprinkle 33.8g of warm mix agent on For the surface of SBS modified asphalt, stir in the mixing pot for 148s, add 425g of mineral powder and 33.8g of fiber into the mixing pot, and stir for 97s, wherein 25% of its weight in the mineral powder is slaked lime, mix the mixed The material is taken out of the pot at 136°C and molded at 128°C to obtain warm mix SMA asphalt mixture.

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Abstract

The invention discloses a warm mixing shape memory alloy (SMA) asphalt mixture. The warm mixing SMA asphalt mixture comprises styrene-butadiene-styrene (SBS) modified asphalt, aggregate, fiber, mineral powder and warm mixing agent, wherein the warm mixing agent is inorganic silico-aluminate of which the water content is 18 to 23 percent; based on 1 weight part of SBS modified asphalt, the mixture contains 10 to 18 parts of aggregate, 0.01 to 0.08 part of fiber, 0.5 to 1.5 parts of mineral powder and 0.02 to 0.08 part of warm mixing agent; and the invention discloses a preparation method for the warm mixing SMA asphalt mixture, and adding sequence, control temperature and mixing time of the materials are described in the method. According to the warm mixing SMA asphalt mixture, the mixing temperature of the SMA asphalt is effectively reduced, the problem that the SMA asphalt mixture is difficult to compact is solved, emission of toxic gases such as 'asphalt fume' is reduced to a great extent, damage to the environment and harm to health of constructors are reduced, and storage type production is facilitated.

Description

【Technical field】 [0001] The invention belongs to the technical field of road engineering materials, and relates to an asphalt mixture and a preparation method thereof. 【Background technique】 [0002] In recent years, with the rapid development of expressway construction in our country, traffic and weather conditions have become more and more demanding on the performance of expressway pavement. The traffic aggravates the damage to the road surface caused by vehicle axle loads; on the other hand, the temperature difference in most areas of my country varies greatly in four seasons, and the asphalt pavement is subjected to the test of changing climate conditions, and the demand for high-quality road asphalt continues to increase. Modification is a commonly used method. Modified asphalt is to add a certain amount of modifier to asphalt to improve the temperature sensitivity, high temperature performance, low temperature performance, durability, aging resistance and other propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B22/08
CPCY02A30/30
Inventor 李志英何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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