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Pre-mixed mortar preparation method

A technology for ready-mixed mortar and tailings powder, which is applied in the field of building materials, can solve the problems of large discharge of tailings waste, land pollution and other problems, and achieves the effect of low water-to-binder ratio, low cost, and solving increasingly tense effects.

Inactive Publication Date: 2015-09-16
CHINA THIRD METALLURGICAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of the prior art, the technical problem solved by the present invention is to provide a preparation method of high-strength, high-toughness, high-stability ready-mixed mortar, and solve the problem that tailings waste discharge occupies a large amount of land and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method for ready-mixed mortar, using the following raw materials in proportions by weight: Portland cement 20, tailings powder 20, tailings aggregate 40, fly ash 10, composite additive 4 and water 30;

[0022] The composite additive is prepared by uniformly mixing the following raw materials in parts by weight: 60 alumina clinker, 30 montmorillonite, 10 sodium sulfate, 5 sucrose, 3 hydroxyethyl methyl cellulose ether (HEMC), 3 bentonite , boric acid 2; concrete fiber 2; naphthalene powder superplasticizer 5; aluminum powder 4;

[0023] The tailings powder is the waste produced during the production of iron ore concentrate powder, and its particle size is 6% above 280um, 53% between 280-100um, 15% between 100-76um, and 26% below 76um; % is volume percentage;

[0024] The tailings aggregate is formed by crushing and grading the tailings produced during iron ore mining and beneficiation, and its particle size is 20-25mm accounting for 70%, 5-20mm accounting f...

Embodiment 2

[0030] A preparation method for ready-mixed mortar, using the following raw materials in proportions by weight: Portland cement 25, tailings powder 18, tailings aggregate 35, fly ash 8, composite additive 3 and water 25;

[0031] The composite additive is prepared by uniformly mixing the following raw materials in parts by weight: alumina clinker 65, montmorillonite 20, sodium sulfate 10, sucrose 10, hydroxyethyl methyl cellulose ether (HEMC) 2, bentonite 3 , boric acid 2; concrete fiber 3; naphthalene powder superplasticizer 4; aluminum powder 5;

[0032] The tailings powder is the waste produced during the production of iron ore concentrate powder, and its particle size is 6% above 280um, 53% between 280-100um, 15% between 100-76um, and 26% below 76um; % is volume percentage;

[0033] The tailings aggregate is formed by crushing and grading the tailings produced during iron ore mining and beneficiation, and its particle size is 20-25mm accounting for 70%, 5-20mm accounting f...

Embodiment 3

[0039] A preparation method for ready-mixed mortar, using the following raw materials in proportions by weight: Portland cement 22, tailings powder 18, tailings aggregate 30, fly ash 5, composite additive 3 and water 30;

[0040] The composite additive is prepared by uniformly mixing the following raw materials in proportion by weight: 60 alumina clinker, 30 montmorillonite, 8 sodium sulfate, 8 sucrose, 3 hydroxyethyl methyl cellulose ether (HEMC), 2 bentonite , boric acid 3; concrete fiber 4; naphthalene-based powder water reducer 5; aluminum powder 5;

[0041] The tailings powder is the waste produced during the production of iron ore concentrate powder, and its particle size is 6% above 280um, 53% between 280-100um, 15% between 100-76um, and 26% below 76um; % is volume percentage;

[0042] The tailings aggregate is formed by crushing and grading the tailings produced during iron ore mining and beneficiation, and its particle size is 20-25mm accounting for 70%, 5-20mm accoun...

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Abstract

The invention provides a preparation method of a high-strength high-toughness high-stability pre-mixed mortar which assists in solving the problem of high land occupation and environment pollution caused by tailings waste discharge. The mortar is prepared from the following raw materials, by weight: 20-25 parts of Portland cement, 15-20 parts of tailings powder, 30-40 parts of a tailings aggregate, 5-10 parts of fly ash, 2-4 parts of a composite additive, and 20-30 parts of water. The composite additive is prepared by uniformly mixing the following raw materials, by weight: 60-70 parts of an alumina clinker, 20-30 parts of montmorillonite, 5-10 parts of sodium sulfate, 5-10 parts of sucrose, 2-3 parts of hydroxyethyl methyl cellulose ether (HEMC), 2-3 parts of bentonite, 2-3 parts of boric acid, 2-4 parts of concrete fiber, 3-5 parts of a naphthalene-series powdery superplasticizer, and 3-5 parts of aluminum powder.

Description

technical field [0001] The invention relates to a comprehensive utilization technology in the field of building materials, in particular to a preparation method for ready-mixed mortar with tailings as aggregate and composite admixture. Background technique [0002] Tailings are wastes produced by metallurgical mining enterprises to produce fine iron ore powder. Because there are many lean ores in my country's iron ore, a large amount of tailings waste is produced in the process of ore mining and beneficiation. According to statistics, about 2 tons of tailings powder are produced for every ton of fine ore concentrate produced, which does not include the large amount of tailings produced during mining and primary selection. At present, tailings wastes are generally stacked in tailings ponds (dams). A large amount of tailings wastes not only occupies a large amount of land, but also seriously pollutes the environment. In the field of construction technology, with the continuo...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/38C04B18/12C04B18/14
CPCY02W30/91
Inventor 田兆文冯雨
Owner CHINA THIRD METALLURGICAL GRP