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Inorganic insulation coating for large dam surface, and preparation method thereof

An inorganic thermal insulation and coating technology, applied in the field of inorganic thermal insulation coatings on dam surfaces and their preparation, can solve the problems of not being able to withstand the scouring of the dam surface by rainwater, losing thermal insulation ability, and peeling off thermal insulation coatings, achieving excellent waterproofness, avoiding The effect of sudden temperature drop and shock, not easy to aging

Active Publication Date: 2013-04-10
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the thermal insulation coatings for exterior walls of civil buildings use organic or polymer materials as the matrix, which have good waterproof performance but poor durability. They are prone to aging under sunlight and cause chalking, which causes the thermal insulation coating to peel off and lose its thermal insulation ability. Not suitable as thermal insulation coating for dam concrete surfaces
However, the thermal insulation coating using inorganic materials as the matrix has strong resistance to ultraviolet light, but its waterproof performance is poor, and it cannot withstand the rain on the surface of the dam.

Method used

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  • Inorganic insulation coating for large dam surface, and preparation method thereof
  • Inorganic insulation coating for large dam surface, and preparation method thereof
  • Inorganic insulation coating for large dam surface, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: the preparation of inorganic thermal insulation coating A on the surface of the dam

[0022] Add 4kg of NaOH to 4kg of water, stir and dissolve in a beaker to form a solution, and let it stand to cool. Add 50 kg of sodium water glass with a modulus of 2.14 into the beaker of the above NaOH solution and stir evenly, then add metakaolin with a total amount of 45 kg in batches and stir evenly at room temperature. Then add 0.5 kg of silane coupling agent and 2 kg of acicular wollastonite into the above-mentioned beaker, and stir thoroughly to obtain an inorganic polymer matrix material. Mix the prepared inorganic polymer base material with the hollow glass microspheres at a mass ratio of 20:1, stir well and evenly, and obtain the inorganic thermal insulation coating A on the surface of the dam.

[0023] Apply the inorganic thermal insulation paint A on the surface of the dam to the surface of the treated concrete specimen. After 30 minutes of surface drying, ...

Embodiment 2

[0027] Embodiment 2: the preparation of inorganic thermal insulation coating B on the surface of the dam

[0028] In the inorganic polymer matrix material formula of above-mentioned dam surface inorganic thermal insulation paint A, add the nano-Fe of 0.5kg mean particle diameter 50nm again 2 o 3 , fully stirred to obtain an inorganic polymer matrix material. Mix the prepared inorganic polymer base material with the hollow glass microspheres at a mass ratio of 50:1, stir well and evenly, and obtain the inorganic thermal insulation coating B on the surface of the dam.

[0029] A series of performance tests were carried out on the inorganic thermal insulation coating B, the bonding strength was 5.44MPa, and the thermal conductivity was 0.11W / (m·K).

Embodiment 3

[0030] Embodiment 3: the preparation of inorganic thermal insulation coating C on the surface of the dam

[0031]Add 3kg of slaked lime to 5kg of water, stir and dissolve in a beaker to form a solution, and let it stand to cool. Add 45kg of potassium silicate with a modulus of 1.5 into the beaker of the above-mentioned slaked lime solution and stir evenly, add a total of 40kg of fly ash in batches and stir evenly at normal temperature. Add 0.7kg nano Fe 2 o 3 , 1 kg of silane coupling agent, 1 kg of acicular wollastonite and 1 part of mica powder were placed in the above-mentioned beaker, and fully stirred to obtain an inorganic polymer matrix material. Mix the prepared inorganic polymer base material with the hollow glass microspheres at a mass ratio of 35:1, stir well and evenly, and obtain the inorganic thermal insulation coating C on the surface of the dam.

[0032] A series of performance tests were carried out on the inorganic thermal insulation coating C, the bonding...

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Abstract

The present invention discloses an inorganic insulation coating for a large dam surface, and a preparation method. The preparation method comprises: according to the mass parts, preparing a solution from an alkali and water, and cooling to a room temperature; pouring the weighed water glass to the solution, adding industrial waste materials, uniformly dispersing; after carrying out a complete reaction, adding a nano-metal oxide material, a surfactant and an inorganic additive, uniformly dispersing to prepare an inorganic polymer matrix material; mixing the prepared inorganic polymer matrix material and hollow glass micro-beads according to the mass ratio, uniformly dispersing to prepare the inorganic insulation coating for the large dam surface. According to the present invention, the prepared inorganic insulation coating of the present invention has good insulation function, can be used only by brushing construction; the post maintenance is easy; the appearance of the large dam is not affected; with the inorganic insulation coating for the large dam surface, the requirements of the large dam surface insulation and the large dam surface protection are met, and the prepared coatingcan be adopted as the insulation coating for the civilian building external walls.

Description

technical field [0001] The invention relates to a thermal insulation coating and a preparation method thereof, in particular to an inorganic thermal insulation coating on the surface of a dam and a preparation method thereof. Background technique [0002] After 1958, there was a climax of water conservancy and hydropower construction across the country. Dozens of large and medium-sized water conservancy projects started construction at the same time. Due to historical and technical reasons, many of the dams had a large number of cracks in the concrete. Studies have shown that the sudden drop in temperature is the main cause of cracks on the surface of mass concrete. Due to the large annual temperature changes and frequent sudden drops in the dam area, it will bring a large temperature drop impact to the surface of the dam body, resulting in large temperature stress, which is extremely It is easy to cause cracks on the surface of the dam body. Therefore, the control of concr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26
Inventor 陈亮韩炜李珍魏涛汪在芹肖承京邵晓妹廖灵敏冯菁李晓鄂李鹏翔
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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