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A kind of high-strength chemical foaming cement and preparation method thereof

A chemical foaming, high-strength technology, applied in the field of building materials, can solve the problems of irregular shape, low strength, high water absorption, etc., and achieve the effect of easy mass production, excellent performance and low water absorption

Active Publication Date: 2018-05-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the physical method, chemical foaming cement has the advantages of simple production process, easy operation, short slurry setting time, and easy mass production, but there are also internal cells with different sizes, irregular shapes, and high connectivity between cells. The disadvantages of low strength and high water absorption severely limit the wide application of chemical foaming cement

Method used

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  • A kind of high-strength chemical foaming cement and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] Weigh 70 parts of 42.5 ordinary Portland cement, 30 parts of secondary fly ash, 0.4 part of 9mm polypropylene fiber, 0.8 part of calcium stearate, 0.08 part of lithium carbonate, 0.1 part of sodium bisulfate, thiourea 0.2 parts, added to the mixing pot and stirred evenly to prepare the mixed material. Add 54 parts of water at 50°C to the mixed material, stir at a high speed for 2 minutes to obtain a uniform slurry; add 5 parts of a hydrogen peroxide foaming agent with a mass concentration of 30% to the slurry, and stir at a high speed for 10 seconds to obtain a mixed slurry . The mixed slurry was quickly poured into a mold, covered with a layer of plastic film, left to foam, demolded after 24 hours, placed in an oven at 50°C, and cured for 28 days to obtain a high-strength new chemical foaming cement.

Embodiment 2

[0026] Weigh 80 parts of 42.5 ordinary Portland cement, 20 parts of secondary fly ash, 0.4 part of 9mm polypropylene fiber, 0.8 part of calcium stearate, 0.08 part of lithium carbonate, 0.05 part of sodium bisulfate, thiourea 0.2 parts, added to the mixing pot and stirred evenly to prepare the mixed material. Add 51 parts of water at 50°C to the mixed material, stir at a high speed for 2 minutes to obtain a uniform slurry; add 4.8 parts of a hydrogen peroxide foaming agent with a mass concentration of 30% to the slurry, and stir at a high speed for 10 seconds to obtain a mixed slurry . The mixed slurry was quickly poured into a mold, covered with a layer of plastic film, left to foam, demolded after 24 hours, placed in an oven at 50°C, and cured for 28 days to obtain a high-strength new chemical foaming cement.

Embodiment 3

[0028] Weigh 70 parts of 42.5 ordinary Portland cement, 30 parts of secondary fly ash, 0.4 part of 9mm polypropylene fiber, 0.8 part of calcium stearate, 0.08 part of lithium carbonate, 0.15 part of sodium bisulfate, thiourea 0.225 parts, added to the mixing pot and stirred evenly to prepare the mixed material. Add 54 parts of water at 50°C to the mixed material, and stir at a high speed for 2 minutes to obtain a uniform slurry; add 5 parts of a hydrogen peroxide foaming agent with a mass concentration of 30% to the slurry, and stir at a high speed for 10 seconds to obtain a mixed slurry . Pour the mixed slurry into the mold quickly, cover with a layer of plastic film, let it stand for foaming, demould after natural curing and molding, and cure the chemical foaming cement formed by natural curing in an oven at 50°C for 28 days, A new high-strength chemical foaming cement is prepared.

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Abstract

The invention discloses a high-strength novel chemical foaming cement and a preparation method thereof. The high-strength novel chemical foaming cement is made of the following raw materials in parts by weight: 70-80 parts of cement, 20-20 parts of fly ash 30 parts, 45-55 parts of water, 0.2-0.4 parts of fiber, 0.8-1 part of foam stabilizer, 0.07-0.08 parts of coagulation accelerator, 4.8-5 parts of foaming agent, 0.05-0.15 parts of sodium bisulfate, 0.2 parts of thiourea ~0.225 copies. The chemically foamed cement prepared by the present invention has the advantages of high strength, low water absorption, light weight, environmental protection and low cost while maintaining the thermal insulation, heat insulation, sound insulation and fire resistance of the original foamed cement. With excellent performance, it can be used in thermal insulation materials for interior and exterior walls of buildings, fireproof isolation belts, roof insulation materials, industrial / military / civil thermal insulation and sound insulation, and traffic / factory environmental noise treatment, etc.

Description

technical field [0001] The invention relates to a novel high-strength chemical foaming cement and a preparation method of the foaming cement, belonging to the field of building materials. Background technique [0002] In recent years, with my country's requirements for building a resource-saving society and the successive introduction of national energy-saving and consumption-reducing policies, energy-saving building materials are bound to become the development direction of new building materials in the future. As the disadvantages of organic thermal insulation materials such as easy cracking, poor durability, flammability, and burning toxic gases have become increasingly apparent, their market share and usage have decreased significantly. As an ideal substitute, inorganic thermal insulation materials are favored because of their outstanding advantages of high safety. As a kind of inorganic thermal insulation material, foamed cement not only has light weight and small ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/04
CPCC04B28/04C04B2201/20C04B2201/32C04B2201/50C04B18/08C04B16/0633C04B24/085C04B22/10C04B22/068C04B22/147C04B24/16C04B38/02
Inventor 呂宪俊褚会超张燕王志强吴蓬
Owner SHANDONG UNIV OF SCI & TECH
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