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Ceramic sand-like composite phase change material and preparation method thereof

A composite phase change material and ceramic sand particle technology are applied in the field of ceramic sand granular composite phase change material and its preparation, and achieve the effects of controlling high temperature diseases, simple preparation and maintaining ecological balance.

Active Publication Date: 2014-04-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a ceramic sand granular composite phase change material and its preparation method in order to solve the high temperature rutting problem of the existing asphalt concrete pavement

Method used

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  • Ceramic sand-like composite phase change material and preparation method thereof
  • Ceramic sand-like composite phase change material and preparation method thereof
  • Ceramic sand-like composite phase change material and preparation method thereof

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specific Embodiment approach 1

[0016] Embodiment 1: A ceramic sand granular composite phase change material in this embodiment is composed of 7-8 parts of ceramic sand and 2-3 parts of organic phase change material in parts by weight.

[0017] This embodiment utilizes the "peak-shifting and valley-eliminating" effect of phase change materials to adjust the temperature field of the asphalt pavement, reduce the possibility of high-temperature rutting, and achieve the purpose of effectively controlling high-temperature diseases of the asphalt pavement. At the same time, it has a certain control effect on the urban "heat island effect", reduces environmental pollution, and maintains ecological balance. The phase change material for pavement prepared by this embodiment has a reversible phase change process, a phase change temperature between 40°C and 75°C, and a phase change latent heat greater than 40kJ / kg. The material has a large phase change latent heat, non-toxic, non-corrosive, The preparation is simple an...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment is different from Embodiment 1 in that: the organic phase change material is myristic acid, PEG4000 or palmitic acid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Specific embodiment three: the preparation method of a kind of pottery sand granular composite phase change material of the present embodiment is carried out according to the following steps: 1. Weigh 7~8 parts of pottery sand and 2~3 parts of organic Phase change material; 2. Grinding, sieving, and washing the pottery sand for 3 to 5 times, and drying the washed pottery sand at 130°C~150°C for 2~3 hours; 3. Weighing step 1 The organic phase change material and the pottery sand dried in step 2 are mixed evenly according to the mass ratio of 3:7, put into a vacuum drying oven to evacuate to 0.09MPa, dry at 150°C for 2~3h, add volume Mineral powder with a fraction of 0.5%, mixed evenly, then dried in an oven at 150°C for 0.5~1h, cooled to room temperature, and passed through a 1.18mm or 0.6mm aggregate standard square hole sieve to obtain a composite material; Resin, acetone and ethylenediamine curing agent are mixed in a mass ratio of 1:0.15:0.25 and stirred evenly to pr...

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Abstract

The invention provides a ceramic sand-like composite phase change material and a preparation method thereof, and relates to a phase change material and a preparation method thereof. The purpose of the present invention is to solve the problem of high temperature rutting on the existing asphalt concrete pavement. The material of the present invention comprises, by weigh, 7-8 parts of ceramic sand, and 2-3 parts of an organic phase change material. The preparation method comprises the following step: 1, weighing the ceramic sand and the organic phase change material; 2, carrying out crushing grinding, screening, water washing, and drying on the ceramic sand; 3, uniformly mixing the organic phase change material and the ceramic sand according to a mass ratio of 3:7, carrying out vacuum drying, adding mineral powder with a volume fraction of 0.5%, and carrying out drying and screening to obtain a composite material; 4, immersing the composite material in an epoxy emulsion, and holding for 3-5 s, and spreading iron powder on the surface to obtain a mixed material; and 5, repeated performing the step 4 3-5 times to obtain the material of the present invention. The material of the present invention has a phase change temperature of 40-75 DEG C and a phase change latent heat more than 40 kJ / kg, and is applicable for the field of asphalt concrete pavements.

Description

technical field [0001] The invention relates to a phase change material and a preparation method thereof, in particular to a ceramic sand granular composite phase change material with a phase change temperature between 40°C and 75°C and a preparation method thereof. Background technique [0002] In summer, under the action of high temperature field and heavy vehicle axle load, asphalt concrete pavement is easy to form high temperature ruts. According to statistics, 85% of the annual road maintenance costs are used for the maintenance and repair of high temperature ruts. Therefore, seeking a scientific and effective method to solve the problem of high-temperature rutting on the road surface has become a research focus. [0003] The causes of rutting on asphalt concrete pavement mainly include two aspects: first, internal factors such as temperature conditions of asphalt concrete pavement and temperature stability of asphalt mixture; second, external factors such as air temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/10
Inventor 谭忆秋边鑫吕建福单丽岩徐慧宁张红
Owner HARBIN INST OF TECH
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