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Special mortar for aerated concrete using red mud as inorganic mineral thickening agent

A technology of air-entrained concrete and inorganic minerals, applied in the field of construction cement mortar, can solve the problems of less than 10% utilization rate, large land occupation, groundwater pollution, etc., and achieve improved workability, high crushing rate, and strong water retention Effect

Inactive Publication Date: 2011-06-15
GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The five major alumina plants in my country discharge 6 million tons of red mud each year, and the accumulated red mud stockpile reaches 50 million tons, with a utilization rate of less than 10%.
This disposal method occupies a large amount of land, and the chemical components in the red mud seep into the land, which is easy to cause ecological and environmental problems such as land alkalization, swamping, and groundwater pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1. It is made by mixing and stirring cement, fly ash, red mud, phosphorus slag particles and water according to the following mass percentages: cement 20%, fly ash 5%, red mud 5%, admixture 0.2%, phosphorus slag 70% , and the rest is water; the amount of water added is subject to the consistency of 90-110mm. Among them, the particle size of phosphorus slag particles is less than 1.25mm, and the moisture content is less than 0.5%; the cement is ordinary portland cement or slag portland cement, and the strength of cement is 32.5 or 42.5; the fly ash is grade II or above Commercial fly ash; the red mud is Bayer method or sintering method red mud, and its fineness is less than 1.18mm; the additive is a combination of water-retaining thickener and retarder, wherein the mass percentage of water-retaining thickener is 0.1% to 0.15% %, the mass percentage of retarder is 0.05% to 0.1%. The measured water retention of the mortar is 99.6%, the degree of delamination is 4...

Embodiment 2

[0016] Example 2. It is made by mixing and stirring cement, fly ash, red mud, phosphorus slag particles and water according to the following mass percentages: cement 15%, fly ash 5%, red mud 10%, admixture 0.15%, phosphorus slag 70% , and the rest is water, the amount of water added is subject to the consistency of 90-110mm. Among them, the particle size of phosphorus slag particles is less than 1.25mm, and the moisture content is less than 0.5%; the cement is ordinary portland cement or slag portland cement, and the strength of cement is 32.5 or 42.5; the fly ash is grade II or above Commercial fly ash; red mud is Bayer method or sintering method red mud, fineness less than 1.18mm; additive is a combination of water-retaining thickener and retarder, wherein the mass percentage of water-retaining thickener is 0.1% to 0.15% , the mass percent of the retarder is 0.05% to 0.1%. The measured water retention of the mortar is 99.1%, the delamination degree is 5mm, and the 28d comp...

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Abstract

The invention discloses special mortar for aerated concrete using red mud as an inorganic mineral thickening agent. The mortar is formed by mixing the following components in percentage by mass: 15-20 percent of cement, 5-10 percent of fly ash, 5-10 percent of red mud, 65-70 percent of phosphorus slag granules, 0.1-0.2 percent of admixture and the balance of water, wherein the water adding amount is based on the consistency controlled at 80-120 millimeters. The characteristic of strong water holding property of the red mud is used in the mortar, and the red mud is used as the inorganic mineral thickening agent, so that the water holding property of the mortar is increased under the condition that other mineral thickening agents are not added, and the workability of the mortar is improved; and meanwhile, the phosphorus slag is used as a fine mortar aggregate, so that the production cost is greatly reduced on the premise that the strength and the other properties meet the requirements of the special mortar for the aerated concrete, the environmental pollution is reduced, and greening of pre-mixed commodity mortar production is realized.

Description

technical field [0001] The invention relates to a building cement mortar, in particular to a special mortar for aerated concrete using red mud as an inorganic mineral thickener. Background technique [0002] Ready-mixed commercial mortar refers to a kind of finished mortar that is transported to the construction site by means of transportation (usually closed tank trucks) after various raw materials are rationally configured and factory-operated. It is characterized by large production batches, stable quality, and low overall cost. As a ready-mixed commercial mortar, special mortar for air-entrained concrete has its own characteristics. First of all, ordinary mortar is used to build aerated blocks. If there are no practical measures, the fullness of the gap mortar and the good adhesion between the two cannot be guaranteed, which is one of the main reasons for the cracking of the wall. This is due to the poor water retention of ordinary mortar, the moisture in the mortar is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/00C04B18/08C04B28/00C04B28/04
CPCC04B28/02Y02W30/91C04B18/0409C04B18/08C04B18/145C04B20/0092C04B40/0032C04B2103/44C04B2103/46
Inventor 帅颂宪漆贵海钟安鑫王玉麟徐立斌冉志伟王勇
Owner GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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