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Water-retaining and cooling pavement material and application thereof

A pavement material and cement technology, applied in the field of pavement materials, can solve the problems of aggravating the urban heat island effect, weakening the urban heat conduction effect, and high pavement temperature, so as to enhance the water absorption and water retention capacity, suitable for construction workability, and improve the overall strength and performance effect

Inactive Publication Date: 2015-01-21
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the small heat capacity and fast heat absorption of current pavement materials, which lead to high road and pavement temperatures and aggravate the urban heat island effect, one of the purposes of the present invention is to provide a pavement material with water retention and cooling functions to reduce road and pavement temperature. Road surface temperature, thereby reducing the urban heat conduction effect

Method used

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  • Water-retaining and cooling pavement material and application thereof
  • Water-retaining and cooling pavement material and application thereof
  • Water-retaining and cooling pavement material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] The raw materials used for preparing the serum in this embodiment are:

[0035] Expanded perlite powder: expanded perlite powder produced by Longhui Perlite Factory in Pingqiao District, Xinyang City. The pass rate of 2.5mm sieve is greater than 95%, and the pass rate of 0.15mm sieve is greater than 92%. Its main chemical composition is shown in Table 1. Show.

[0036] Table 1

[0037] content

SiO 2

al 2 o 3

FeO

CaO

Loss on ignition

Index %

72

13

0.3

0.36

4.9

[0038] Cement: Ordinary Portland cement produced by Shaanxi Qinling Cement Co., Ltd. has qualified stability and a strength grade of 42.5R, and its performance indicators meet the requirements of "General Portland Cement" (GB175-2007);

[0039] Sepiolite powder: Sepiolite powder produced by Hebei Yixian Sepiolite Factory, the particle size is 200-300 mesh, and the main chemical composition is shown in Table 2.

[0040] Table 2

[0041] ...

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Abstract

The invention discloses a water-retaining and cooling pavement material and an application thereof. The water-retaining and cooling pavement material is prepared from expanded perlite powder, cement, sepiolite powder, quartz sand powder, water-absorbent resin and a water reducing agent in an appropriate mass ratio. The water-retaining and cooling pavement material is applied to surfacing, and porous asphalt mixture or a porous cement concrete material with the void ratio of 20-30% is combined, so that finishing strength and performance of the pavement material are improved, and the aim of lowering temperatures of a pavement and a pavement surface is achieved.

Description

technical field [0001] The invention belongs to the technical field of pavement materials, and in particular relates to a pavement material with the function of water retention and cooling and its application. Background technique [0002] The urban heat island effect is that the temperature in the urban area is significantly higher than that in the outer suburbs. With the continuous development and expansion of the city, this comprehensive phenomenon of microclimate changes will become more and more obvious. The reasons for its formation mainly include the characteristics of the underlying surface of the city, greenhouse gas emissions, man-made heat release, and air pollution. The thermal properties of the ground. [0003] Urban asphalt pavement has a small heat capacity and absorbs heat quickly. Under the same solar radiation conditions, the temperature rises rapidly. For example, in summer, when the tree canopy or lawn temperature reaches 30°C, the temperature of the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/18
Inventor 蒋玮沙爱民肖晶晶王振军
Owner CHANGAN UNIV