Super-light foam concrete and preparation method thereof

A technology of foam concrete and ultra-fine fly ash, which is applied in the field of foam concrete, can solve the problems of slow hydrogen peroxide decomposition, increased production cost, and low foaming efficiency, so as to speed up the setting and hardening speed, speed up the turnover speed, and improve the production quality Effect

Inactive Publication Date: 2017-11-07
CHONGQING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The decomposition speed of hydrogen peroxide is too fast, which will easily lead to mold collapse or high open porosity, while the decomposition speed of hydrogen peroxide is slow and the foaming efficiency is low, which not only leads to an increase in the amount of

Method used

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  • Super-light foam concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0071] Example 1

[0072] In this embodiment, the ultra-light foam concrete uses the following materials by mass:

[0073] Ordinary Portland Cement: 80 parts

[0074] Fast hardening sulphoaluminate cement: 10 parts

[0075] Silica fume: 2 parts

[0076] Superfine fly ash: 8 parts

[0077] Polycarboxylic acid water reducing agent: 0.5 parts

[0078] Redispersible latex powder: 1 part

[0079] Hydroxypropyl methyl cellulose ether: 0.1 part

[0080] Polypropylene fiber: 0.4 parts

[0081] Slow release catalyst: 0.01 parts

[0082] Capsule disintegration time limit 10min

[0083] Hydrogen peroxide: 4 parts

[0084] Water: 50 parts.

[0085] Ordinary Portland cement, fast hardening sulphoaluminate cement, silica fume and ultra-fine fly ash together constitute a composite cementing material. The masses of the four add up to 100 parts, and the parts of other raw materials are the same as the above The quality ratio of the sum of the four qualities. It can be seen from the above that sulfoaluminate ce...

Example Embodiment

[0092] Example 2

[0093] In this embodiment, the ultra-light foam concrete uses the following materials by mass:

[0094] Ordinary Portland Cement: 75 parts

[0095] Fast hardening sulphoaluminate cement: 10 parts

[0096] Silica fume: 5 parts

[0097] Superfine fly ash: 10 parts

[0098] Polycarboxylic acid water reducing agent: 0.6 parts

[0099] Redispersible latex powder: 1.5 parts

[0100] Hydroxypropyl methyl cellulose ether: 0.05 parts

[0101] Polypropylene fiber: 0.3 parts

[0102] Superfine MnO 2 Catalyst: 0.01 parts

[0103] Capsule disintegration time limit 8min

[0104] Hydrogen peroxide: 4.5 parts

[0105] Water: 50 parts.

[0106] The preparation method is the same as in Example 1.

Example Embodiment

[0107] Example 3

[0108] In this embodiment, the ultra-light foam concrete uses the following materials by mass:

[0109] Ordinary Portland Cement: 70 parts

[0110] Fast hardening sulphoaluminate cement: 12 parts

[0111] Silica fume: 3 parts

[0112] Superfine fly ash: 15 parts

[0113] Polycarboxylic acid water reducing agent: 0.7 parts

[0114] Redispersible latex powder: 1.5 parts

[0115] Hydroxypropyl methyl cellulose ether: 0.1 part

[0116] Polypropylene fiber: 0.3 parts

[0117] Superfine MnO 2 Catalyst: 0.015 parts

[0118] Capsule disintegration time limit 7min

[0119] Hydrogen peroxide: 5 parts

[0120] Water: 55 parts.

[0121] The preparation method is the same as in Example 1.

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Abstract

The invention discloses super-light foam concrete. The super-light foam concrete is characterized by comprising the following materials in parts by mass: 60-80 parts of ordinary Portland cement, 10-20 parts of rapid hardening sulphoaluminate cement, 2-5 parts of silica fume, 8-15 parts of ultra-fine fly ash, 0.5-1.0 part of a polycarboxylate superplasticizer, 1-2 parts of redispersible powder, 0.05-0.2 part of hydroxypropyl methyl cellulose ether, 0.1-0.4 part of polypropylene fibers, 0.02-0.05 part of a superfine MnO2 catalyst, 4-6 parts of hydrogen peroxide and 50-60 parts of water, wherein a sustained-release gelatin capsule is filled with the superfine MnO2 catalyst and has the collapse time limit of 5-10 min. The invention also discloses a preparation method of the super-light foam concrete. The preparation method is characterized by comprising the steps of weighing, mixing, stirring and pouring. The super-light foam concrete has the advantages of high percentage of close area, low water absorption, high compressive strength and low heat conduction coefficient. The preparation method of the super-light concrete has the advantages that the hydrogen peroxide decomposition efficiency can be improved, and the hydrogen peroxide decomposition speed can be effectively controlled.

Description

technical field [0001] The invention belongs to the field of foam concrete, and in particular relates to an ultra-light foam concrete and a preparation method thereof. Background technique [0002] Chemical foaming agent is a class of chemical substances that can chemically react with other substances or decompose themselves at a certain temperature to produce reactive gases. Chemical foaming agents can be divided into two categories according to the principle of gas foaming: foaming agents that generate gas by pyrolysis and foaming agents that generate gas by reaction. Among them, the most commonly used foaming agents for pyrolysis to generate gas are aluminum powder and hydrogen peroxide. Considering that the hydrogen generated by the reaction of aluminum powder has problems such as too fast gas generation, flammability and explosion, the use of aluminum powder or aluminum paste as a foaming agent has high requirements on the production process and production environment,...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B38/02
CPCC04B28/06C04B2201/20C04B2201/32C04B2201/50C04B7/02C04B18/146C04B18/08C04B2103/302C04B2103/0057C04B24/383C04B16/0633C04B2103/10C04B22/002C04B22/068C04B38/02C04B38/0061
Inventor 刘晓英贾兴文杨再富石从黎樊先平张新马冬王平李俊萌
Owner CHONGQING UNIV
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