Low-density composite foaming cement and preparation method thereof

A technology of foamed cement and low density, which is applied in the field of building materials, can solve the problems of the preparation method of foamed cement that does not involve the specific material and type of foaming agent, the preparation process is complicated, and the ratio of cement slurry to foam is not easy to control, etc., to achieve Good fire resistance, low bulk density, low thermal conductivity

Inactive Publication Date: 2013-04-10
JIANGSU JINMAO TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has problems such as complicated preparation process and difficulty in controlling the ratio of cement slurry to foam.
Patent CN101113105A discloses a foamed cement and its preparation method and application. Its components include foaming agent, fly ash and cement. This patent does not involve the specific material and type of foaming agent and its preparation method for foamed cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A low-density composite foamed cement proportioned by weight: 100 parts of sulfoaluminate cement, 15 parts of fly ash, 1.5 parts of redispersible latex powder, 2 parts of calcium stearate, and 1 part of organic silicon water repellent , 0.5 parts of methyl cellulose ether, 0.5 parts of polypropylene fiber, 0.2 parts of coconut oil fatty acid diethanolamide, 6 parts of hydrogen peroxide, and 65 parts of water.

[0017] Preparation method: Accurately weigh the materials of each component according to the proportion, add the materials (excluding hydrogen peroxide) into the mixer one by one, stir for 5 minutes, add hydrogen peroxide and stir for 30 seconds, and pour into the shape for natural curing.

[0018] After testing, the dry density of the low-density composite foamed cement is 230kg / m 3 , The thermal conductivity is 0.055W / (m·K), the compressive strength is 0.41MPa, the water absorption is 7.2%, and the drying shrinkage is 0.64mm / m.

Embodiment 2

[0020] A low-density composite foamed cement proportioned by weight: 90 parts of sulfoaluminate cement, 10 parts of Portland cement, 15 parts of fly ash, 1.5 parts of redispersible latex powder, 2.3 parts of calcium stearate, 1 part of silicone water repellent, 0.5 part of methyl cellulose ether, 0.5 part of polypropylene fiber, 0.2 part of acrylic emulsion, 5.6 parts of hydrogen peroxide, 70 parts of water.

[0021] Preparation method: Accurately weigh the materials of each component according to the proportion, add the materials (excluding hydrogen peroxide) into the mixer one by one, stir for 5 minutes, add hydrogen peroxide and stir for 30 seconds, and pour into the shape for natural curing.

[0022] After testing, the dry density of the low-density composite foamed cement is 240kg / m 3 , The thermal conductivity is 0.061W / (m·K), the compressive strength is 0.45MPa, the water absorption is 7.5%, and the drying shrinkage is 0.65mm / m.

Embodiment 3

[0024] A low-density composite foamed cement proportioned by weight: 100 parts of Portland cement, 20 parts of fly ash, 1.3 parts of redispersible latex powder, 1.5 parts of aluminum stearate, 1 part of silicone water repellent, 0.5 parts of methyl cellulose ether, 0.5 parts of polypropylene fiber, 0.2 parts of triethanolamine, 1 part of sodium sulfate, 2 parts of sodium aluminate, 5.8 parts of hydrogen peroxide, and 80 parts of water.

[0025] Preparation method: Accurately weigh the materials of each component according to the proportion, add the materials (excluding hydrogen peroxide) into the mixer one by one, stir for 5 minutes, add hydrogen peroxide and stir for 30 seconds, and pour into the shape for natural curing.

[0026] After testing, the dry density of the prepared low-density composite foamed cement is 252kg / m 3 , The thermal conductivity is 0.068W / (m·K), the compressive strength is 0.50MPa, the water absorption is 7.6%, and the drying shrinkage is 0.76mm / m.

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Abstract

The invention discloses low-density composite foaming cement and a preparation method thereof, relating to a light building material. The foaming cement is prepared by adopting a normal-temperature foaming technology, and comprises the following components in parts by weight: 100 parts of cement, 10-50 parts of active admixture, 1-5 parts of redispersible emulsion powder, 1-4 parts of water repellent, 0.5-1.5 parts of cellulose ether, 0.3-0.7 parts of reinforced fiber, 0.2-0.5 parts of foam stabilizer, 3-8 parts of foaming agent and 50-80 parts of water. The method comprises the following preparation steps of: proportionally mixing and stirring the cement, active admixture, redispersible emulsion powder, water repellent, cellulose ether, reinforced fiber, foam stabilizer, and water into cement slurry; adding the foaming agent; and stirring, molding by casting and naturally curing. The foaming cement disclosed by the invention has the advantages of low volume weight, small heat conducting coefficient, small shrinkage ratio, high intensity, integration of heat preservation, sound insulation, fire prevention and low carbon, simple and convenient production preparation process and easiness in controlling.

Description

technical field [0001] The invention relates to a low-density composite foamed cement with thermal insulation and sound insulation properties, which belongs to building materials. Background technique [0002] At present, most of the insulation materials used in the external wall insulation system in my country's building energy-saving system are organic polymer materials such as flammable extruded boards, which are very prone to fire; in recent years, due to the use of organic polymer insulation materials, it has caused A number of large fires caused serious losses, which has attracted the attention of relevant departments. On March 14, 2011, the Fire Department of the Ministry of Public Security issued the "Notice on Further Clarifying the Relevant Requirements for Fire Supervision and Management of Civil Building External Insulation Materials". It is clearly pointed out: "Before the release of the new standard, strictly implement the provisions of Article 2 of the "Interim ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04C04B28/06
Inventor 胡峻张长森
Owner JIANGSU JINMAO TECH DEV
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