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Lightweight heat-insulating semi-flexible anti-cracking pavement and preparation method thereof

A semi-flexible pavement, light-weight thermal insulation technology, applied in the direction of on-site coagulation pavement, roads, roads, etc. Problems such as the stable reduction of the volume of pavement materials

Active Publication Date: 2021-07-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the traditional semi-flexible pavement is mostly made of ordinary Portland cement mortar, which is not only heavy, but also increases the work of improving the foundation, and the cement-based grouting material is in the early stage of cement hydration due to temperature changes. It causes uneven evaporation of water, resulting in temperature shrinkage, self-shrinkage, etc., which leads to a stable decrease in the volume of semi-flexible pavement materials, and a decrease in the bonding strength of the internal asphalt-aggregate-cement mortar interface; with the increase in traffic volume, 5 ~6 years cause cracks and potholes on the road surface, requiring major repairs on the road surface, which is a serious waste of resources

Method used

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  • Lightweight heat-insulating semi-flexible anti-cracking pavement and preparation method thereof
  • Lightweight heat-insulating semi-flexible anti-cracking pavement and preparation method thereof
  • Lightweight heat-insulating semi-flexible anti-cracking pavement and preparation method thereof

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Embodiment 1

[0052] A light heat-insulating semi-flexible crack-resistant pavement, which includes large-void asphalt concrete and foamed cement mortar filled therein, with a slurry rate of more than 80%. The preparation method includes the following steps:

[0053] 1) Weighing of raw materials; the mass percentage of each solid particle in large-void asphalt concrete is: 36% of basalt aggregate with a particle size of 9.5-16mm, 49% of basalt aggregate with a particle size of 4.75-9.5mm, and 2.36-4.75mm 2% basalt aggregate, 9% basalt aggregate with a particle size of 0-2.36mm, 4% limestone mineral powder filler, high-viscosity modified asphalt with an oil-stone ratio of 3.3; in the foamed cement mortar, 250 parts of cement, fly ash 500 parts, 220 parts of lime, 30 parts of gypsum, 1 part of aluminum powder paste, 5 parts of anhydrous sodium sulfate, 5 parts of sodium polyacrylate, 40 parts of carboxylated styrene-butadiene emulsion, and the ratio of water to material used is 0.65;

[0054]...

Embodiment 2

[0061] A light-weight heat-insulating semi-flexible anti-crack pavement, which includes large-void asphalt concrete and foamed cement mortar filled therein, with a grouting rate of more than 80%. The preparation method includes the following steps:

[0062] 1) Weighing of raw materials; the mass percentage of each solid aggregate in large-void asphalt concrete is: 35% of steel slag aggregate with particle size of 9.5-16mm, 48% of steel slag aggregate with particle size of 4.75-9.5mm, and 2.36-4.75mm of particle size 3% of steel slag aggregate, 10% of steel slag aggregate with a particle size of 0-2.36mm, 4% of limestone mineral powder filler, and 3.5 oil-stone ratio for high-viscosity modified asphalt; in foamed cement mortar, 250 parts of cement, fly ash 500 parts, 220 parts of lime, 30 parts of gypsum, 1 part of aluminum powder paste, 5 parts of anhydrous sodium sulfate, 5 parts of sodium polyacrylate, 40 parts of carboxylated styrene-butadiene emulsion, and the ratio of wate...

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Abstract

The invention discloses a lightweight heat-insulating semi-flexible anti-cracking pavement which comprises large-gap asphalt concrete and foaming cement glue filled in gaps of the large-gap asphalt concrete, wherein the macropore asphalt concrete is prepared from aggregate, filler and high-viscosity modified asphalt as main raw materials, and the high-viscosity modified asphalt is prepared by adding high-viscosity modified anti-crack particles into SBS modified asphalt or matrix asphalt for modification; the foamed cement mucilage is prepared from cement, quick lime, fly ash, gypsum, carboxylated styrene-butadiene emulsion, sodium sulfate, sodium polyacrylate, aluminum powder paste and water as raw materials. The lightweight flexible pavement has the advantages of light self-weight, good thermal insulation performance, high interface bonding performance and the like, can effectively reduce the low-temperature cracking property of the pavement, is suitable for middle and upper surface layers of the pavement, solves the problems of easy surface cracking and fatigue aging of the existing semi-flexible pavement, prolongs the service life of the pavement, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a light semi-flexible crack-resistant pavement with heat insulation performance and a preparation method thereof. Background technique [0002] With the rapid development of highway traffic, asphalt pavement has become the main pavement form of expressways and urban roads due to its advantages of smooth surface, short construction period and driving comfort. However, because asphalt material is a polymer material, it is easy to age and has poor temperature stability, coupled with the pressure of heavy load, overload and a large amount of traffic, asphalt pavement will appear rutting and other road surface damage in just 2 to 3 years. In order to curb the rutting phenomenon of the road surface, semi-flexible pavement design is usually adopted. [0003] Semi-flexible pavement refers to a composite pavement material formed by pouring special cement-based grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18E01C11/00E01C11/24C04B38/02C04B28/04C04B111/40
CPCE01C7/18E01C7/187E01C11/005E01C11/24C04B28/04C04B2111/0075C04B2111/40C04B22/064C04B18/08C04B22/143C04B22/147C04B24/24C04B24/2641C04B22/04C04B38/02Y02W30/91
Inventor 谢君宋茳铠吴少鹏王志虎杨东庞凌陈美祝刘全涛张登峰
Owner WUHAN UNIV OF TECH
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