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Slurry material with cold accumulation and heat resistance function and high water content

A water slurry and heat resistance technology, applied in the field of high water-containing slurry materials, can solve problems such as difficulty in meeting cooling requirements, insufficient efficacy, inconvenient construction, etc., and achieve the effects of fast solidification, outstanding cooling efficiency and convenient construction.

Inactive Publication Date: 2012-10-10
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Facing the unique conditions of high temperature and high ice content in my country's permafrost regions, the above engineering measures have some obvious deficiencies and defects, such as insufficient efficacy, inconvenient construction, high cost, or only "point" cooling, which is difficult to achieve. Satisfy the cooling requirements on the "line" and "surface" required in the project

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: The base material is composed of the following components by weight: 100 grams of sulphoaluminate cement clinker; 3 grams of sodium bentonite as suspending agent. The auxiliary materials are composed of the following components by weight: 35 grams of natural anhydrite for gypsum; 11.7 grams of quicklime; 2 grams of LiOH for accelerator and early strength agent; 1.5 grams of polymer water-absorbing resin for water retention agent; 1.4 grams of sodium bentonite . The preparation method of the water-rich slurry material: mix and grind the components of the base material and the auxiliary material separately, pass through a 200-mesh sieve to make a solid powder, and then use different containers to add water and stir the base material and auxiliary material, and the water-cement ratio is 2.0 . Then they are pumped to the place of use by pipeline respectively, and the two slurries are mixed and stirred for use.

[0015] The relevant physical, thermal and mech...

Embodiment 2

[0016] Example 2, the base material is composed of the following components by weight: 100 grams of sulphoaluminate cement clinker; 3 grams of sodium-based bentonite. The auxiliary material is composed of the following components by weight: 25 grams of natural anhydrite; 8 grams of quicklime; 1 gram of accelerator LiOH; 1 gram of water-retaining agent; 1 gram of sodium bentonite. The operation steps of the method of use in Example 2 are the same as in Example 1, and the water-cement ratio is 2.5. In order to reduce the frost heave of the water-rich material, the foaming agent and water are put into the foaming machine at a ratio of 1:20 to prepare Fine and dense foam, mixed with slurry according to the proportion of 10% by volume.

[0017] The relevant physical, thermal and mechanical properties of the hardened body of this slurry material were tested in the laboratory. When the water-cement ratio is 2.5, the water content of the stone body is 158%; the thermal conductivity r...

Embodiment 3

[0018] Example 3, the base material is composed of the following components by weight: 100 grams of sulphoaluminate cement clinker; 3 grams of sodium-based bentonite. The auxiliary material is composed of the following components by weight ratio: 40 grams of natural anhydrite; 13 grams of quicklime; 3 grams of accelerator LiOH; 2 grams of water-retaining agent; 1.6 grams of sodium bentonite. The operation steps of the method of use in Example 3 are the same as in Example 1, and the water-cement ratio is 3.0. In order to reduce the frost heave of the water-rich material, put the foaming agent and water into the foaming machine at a ratio of 1:20 to prepare a fine The foam is mixed with the slurry according to the proportion of 10% by volume.

[0019] The relevant physical, thermal and mechanical properties of the hardened body of this slurry material were tested in the laboratory. When the water-cement ratio is 3.0, the water content of the stone body is 120%; the ratio of the...

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Abstract

The invention relates to a slurry material with a cold accumulation and heat resistance function and high water content and belongs to cold accumulation and heat resistance materials. The slurry material with the cold accumulation and heat resistance function and high water content utilizes natural cold energy to accumulate cold and reduce temperature to effectively protect ever-frozen ground and ensure engineering stability. The material is mainly formed by a basic material and an auxiliary material, wherein the basic material consists of sulphoaluminate cement clinker and suspending agents, and the auxiliary material consists of gypsum, calcium oxide, coagulation accelerators, water-retaining agents and suspending agents. Inorganic materials in the slurry material perform hydration reaction to form net-structured ettringite which can solidify a large amount of free water in a short time to form a hardening body with certain strength. A heat conductivity factor changes according to phase transition between ice and water; the hardening body has a small heat conductivity factor in a thermotropic state in summer; and under the condition of subzero temperature in winter, the free water in the material is frozen to be ice so that the heat conductivity factor of the hardening body becomes large. The slurry material with the cold accumulation and heat resistance function and high water content has the advantages of being obvious in temperature reduction effect, simple in preparation, low in preparation cost, convenient to construct, wide in application range, friendly to environment and the like.

Description

technical field [0001] The invention relates to a cold storage and heat resistance material, in particular to a high water content slurry material with the function of cold storage and heat resistance. Background technique [0002] With the full implementation of the western development strategy, my country will continue to construct major engineering facilities such as railways, highways, oil pipelines, optical cables, and water conservancy in permafrost areas. The construction of projects in cold regions will cause the permafrost below to melt and settle, seriously affecting the stability and normal operation of the project. New projects in cold regions are faced with many problems such as high temperatures close to 0°C, high permafrost, that is, permafrost with a volume ice content of more than 30%, global warming, and the continuous degradation of permafrost. [0003] At present, the engineering measures to protect the permafrost below the railway and highway subgrade m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B38/02C04B22/06C04B24/24
Inventor 周国庆王建州魏亚志周扬赵光思鲍强王英杰王涛
Owner CHINA UNIV OF MINING & TECH
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