An efficient heat insulating material for a dam concrete surface and a preparing method thereof

Abstract

An efficient heat insulating material for a dam concrete surface is disclosed. The material is rigid polyurethane foam which includes an A component and a B component. The A component includes, by weight, 5-38 parts of polyether polyol, 0.01-1 part of epoxy resin, 0.01-1 part of a first catalyst, 0.01-1 part of a second catalyst, 0.1-3 parts of rigid polyurethane foam silicone oil AK-158, 7.00-9.00 parts of a first foamer, 0.1-1 part of a second foamer, 1-10 parts of a first fire retardant, and 0.10-1.00 part of a second fire retardant. The B component includes 55.00-57.00 parts by weight of diphenylmethane diisocyanate. The heat insulating material has the advantages of excellent thermal insulation property, good moisture-resisting and heating-resisting properties, good durability, good flame retardancy and strong deformation adaptability. The invention also discloses a method for preparing the heat insulating material.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, more specifically, it is a high-efficiency thermal insulation material for the concrete surface of a dam. The invention also relates to a method for preparing the high-efficiency thermal insulation material on the concrete surface of the dam. Background technique [0002] Concrete dams are bulky, and measures need to be taken to solve the stress and strain caused by the temperature change in the block due to the heat generated by cement hydration during the hardening process of concrete, and reduce the harmful cracks in the dam body. However, dam cracking is a relatively common phenomenon in actual engineering. In the history of dam construction at home and abroad, there are many concrete dams damaged by cracks. Among the many factors that affect the safety of concrete dams, dam concrete cracks have attracted the general attention of the dam industry. [000...

AI Technical Summary

Problems solved by technology

[0007] Affected by many factors, the thermal insulation effect of the dam has been unsatisfactory. The existing thermal insulation materials and thermal insulation methods of the dam have average thermal insulation performance, good heat and humidity resistance and durability, poor flame retardancy, and poor deformation adaptability. After the existing thermal insulation materials and thermal insulation measures, there are still many cracks on the surface of the dam; it is urgent to conduct research on high-efficiency thermal insulation materials and preparation methods for the concrete surface of the dam, so as to develop a kind of thermal insulation with excellent thermal insulation performance, good resistance to heat and humidity, High-efficiency thermal insulation material for dam concrete surface with good durability, good flame retardancy, and strong deformation adaptability to prevent surface cracks in dams

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