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Foam aerated concrete building block prepared from iron tailings at normal temperature and under normal pressure and preparation method of foam aerated concrete building block

A technology of aerated concrete and iron tailings, applied in the field of inorganic materials, can solve the problems of restricting large-scale production, low safety factor, and high price, and achieve the effects of fast reaction and processing time, low equipment requirements, and low price

Inactive Publication Date: 2019-05-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, autoclaved curing is expensive and leads to higher costs; similarly, using autoclaved curing methods to maintain aerated blocks also has disadvantages such as low safety factor and harsh conditions, which also largely restrict large-scale production.

Method used

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  • Foam aerated concrete building block prepared from iron tailings at normal temperature and under normal pressure and preparation method of foam aerated concrete building block
  • Foam aerated concrete building block prepared from iron tailings at normal temperature and under normal pressure and preparation method of foam aerated concrete building block
  • Foam aerated concrete building block prepared from iron tailings at normal temperature and under normal pressure and preparation method of foam aerated concrete building block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Preparation of foam aerated concrete block

[0028] The foamed aerated concrete block consists of the following components in terms of weight percentage: iron tailings 35%, cement 41%, early strength agent 2%, fly ash 10%, hydroxymethyl cellulose 2%, Rubber powder 3%, polypropylene fiber 2%, foaming agent 1%, melamine water reducing agent 2%, silicone water repellent agent 1%, silicone resin polyether emulsion foam stabilizer 1%.

[0029] In parts by weight, the preparation method of the foamed aerated concrete block comprises the following steps:

[0030] 1) Grind the iron tailings with a ball mill to obtain iron tailings powder;

[0031] 2) Take 35 parts of iron tailings powder obtained in step 1), 41 parts of cement, 10 parts of fly ash, 2 parts of polypropylene fiber, 2 parts of melamine water reducing agent, and 1 part of organic silicon water repellent, dry mix and stir to obtain Dry mixed raw materials;

[0032] 3) Add 2 parts of hydroxymethyl cellulose, 3 part...

Embodiment 2

[0035] Example 2 Preparation of foam aerated concrete block

[0036] The foamed aerated concrete block is composed of the following components in terms of weight percentage: iron tailings 50%, cement 30%, early strength agent 3%, fly ash 3%, hydroxymethyl cellulose 1%, Rubber powder 2%, polypropylene fiber 4%, foaming agent 2%, melamine water reducing agent 2%, silicone water repellent agent 2%, silicone resin polyether emulsion foam stabilizer 1%.

[0037] In parts by weight, the preparation method of the foamed aerated concrete block comprises the following steps:

[0038] 1) Grind the iron tailings with a ball mill to obtain iron tailings powder;

[0039] 2) Take 50 parts of iron tailings powder obtained in step 1), 30 parts of cement, 2 parts of melamine water reducing agent, 2 parts of organosilicon water repellent, 3 parts of fly ash, 4 parts of polypropylene fiber, dry mix and stir uniformly to obtain Dry mixed raw materials;

[0040] 3) Add 1 part of hydroxymethyl cellulose, 2...

Embodiment 3

[0042] Example 3 Preparation of foam aerated concrete block

[0043] The foamed aerated concrete block is composed of the following components in terms of weight percentage: iron tailings 43%, cement 39%, early strength agent 2%, fly ash 5%, hydroxymethyl cellulose 3%, Rubber powder 1%, polypropylene fiber 2%, foaming agent 1%, melamine water reducing agent 2%, silicone water repellent agent 1%, silicone resin polyether emulsion foam stabilizer 1%.

[0044] In parts by weight, the preparation method of the foamed aerated concrete block comprises the following steps:

[0045] 1) Grind the iron tailings with a ball mill to obtain iron tailings powder;

[0046] 2) Take 43 parts of iron tailings powder obtained in step 1), 39 parts of cement, 5 parts of fly ash, 2 parts of polypropylene fiber, 2 parts of melamine water reducing agent, and 1 part of organosilicon water repellent. Dry mixed raw materials;

[0047] 3) Add 3 parts of hydroxymethyl cellulose, 1 part of rubber powder, 2 parts o...

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Abstract

The invention discloses a foam aerated concrete block prepared from iron tailings at normal temperature and under normal pressure and a preparation method of the foam aerated concrete building block.The foamed aerated concrete block comprises the following components in percentage by weight: 20-50% of the iron tailings, 30-60% of cement, 2-4% of an early strength agent, 3-10% of fly ash, 1-3% ofcellulose, 1-3% of glue powder, 2-4% of polypropylene fibers, 1-2% of a foaming agent, 1-2% of a melamine water reducer, 1-2% of an organic silicon hydrophobic agent and 0.5-1.5% of a foam stabilizer.The foam concrete building block prepared by the invention has lower density, higher porosity, higher sound insulation property and stronger heat insulation property after being tested; the foam concrete building block prepared by the invention has excellent performance, and in a process of preparing the foam aerated concrete building block, process steps are simple, the reaction treatment time is extremely fast, the curing method is simple, and the production efficiency of enterprises can be greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of inorganic materials, and specifically relates to a foam aerated concrete block prepared at room temperature and pressure with iron tailings as raw materials and a preparation method thereof. Background technique [0002] Tailings treatment is an important part of comprehensive utilization of resources. A large number of domestic tailings not only occupy land and cause a waste of resources, but also cause serious pollution and harm to the human living environment and deteriorate the environment. How to develop and utilize these tailings, which have been sleeping for many years with an alarming amount, truly realize modern production with "no tails, no waste, and no pollution", and to promote comprehensive management of the mine environment is also an important issue of common concern for my country and the world. [0003] The aerated block industry has developed rapidly in the past few decades. Nowadays, most ae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B38/10
Inventor 王建国孔祥宇宋鑫杨骏
Owner ZHEJIANG UNIV OF TECH
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