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Red mud unfired aggregate

A red mud and aggregate technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high and difficult red mud treatment, high-cost processing of sintered aggregates, etc., to reduce energy consumption costs, Reduced water absorption and reduced disposal costs

Active Publication Date: 2022-05-10
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects, solve the problems of high red mud pH difficult to handle and high-cost processing of sintered aggregate, the present invention proposes a kind of red mud bone-free materials, as follows:

Method used

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  • Red mud unfired aggregate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, mix 80 parts of red mud, 3 parts of mineral powder, 2 parts of dihydrate gypsum of desulfurized gypsum, 3 parts of silica fume, 1 part of dispersible latex powder, 1 part of water reducer, and 10 parts of kaolin, and then pass A large granulator is used to granulate to obtain semi-finished aggregates; the semi-finished products are screened through a 4.75mm sieve to obtain coarse aggregates and fine aggregates, and the finished products are obtained after 28 days of moisturizing and curing at 20°C.

Embodiment 2

[0032] Mix 50 parts of red mud, 15 parts of mineral powder, 5 parts of desulfurized gypsum dihydrate gypsum, 10 parts of quartz powder, 3 parts of dispersible latex powder, 1 part of water reducing agent, and 22 parts of fly ash, and then pass through a large The granulator granulates to obtain semi-finished aggregates; the semi-finished products are screened through a 4.75mm screen to obtain coarse aggregates and fine aggregates respectively, and the finished products are obtained after 30°C moisturizing and curing for 14 days.

Embodiment 3

[0034] Mix 60 parts of red mud, 5 parts of steel slag, 3 parts of hemihydrate gypsum of desulfurized gypsum, 6 parts of silica fume, 2.5 parts of dispersible latex powder, 0.5 parts of water reducer, and 23 parts of kaolin, and then pass it through a large granulator Granulate to obtain the semi-finished aggregate; sieve the semi-finished product through a 4.75mm sieve to obtain coarse aggregate and fine aggregate respectively, and obtain the finished product after 7 days of moisturizing and curing at 40°C.

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Abstract

The invention discloses a red mud unfired aggregate, which comprises the following raw materials by mass: 50-80 parts of red mud, 5-30 parts of a reaction auxiliary agent, 3-10 parts of a reinforcing agent, 2-4 parts of an additive, and 10-23 parts of an alkali inhibitor, the reaction auxiliary agent comprises gypsum powder and at least one of mineral powder and steel slag powder, and the reinforcing agent comprises one or two of silica fume and quartz powder; the alkali inhibitor comprises one or two of fly ash and kaolin. Silicon, aluminum and the like with relatively high activity are introduced by utilizing the mineral powder and the steel slag powder, so that the compressive strength of the red mud unfired aggregate is improved. Calcium sulfate and other substances are introduced through gypsum, structures such as ettringite and the like can be generated under the alkaline condition, free calcium is absorbed, gaps of the aggregate are filled, and the water absorption rate of the aggregate is reduced.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a red mud burn-free aggregate. Background technique [0002] Aggregate is a granular loose material that acts as a skeleton or filling in concrete. As the main raw material in concrete, aggregate plays a role of skeleton and support in buildings. The current aggregates are mainly divided into natural aggregates and artificial aggregates. Natural aggregates refer to natural rocks or rock particles made by mechanical crushing and screening, or natural weathering, water handling and sorting, Accumulated rock particles with a particle size greater than 4.75mm. However, with the improvement of people's awareness of environmental protection, the country's environmental protection monitoring is becoming more and more strict, the mining of natural sand and gravel is becoming more and more strict, the importance of artificial aggregate is becoming more and more important, and the marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B18/04
CPCC04B18/021C04B18/0409C04B18/141C04B18/146C04B2103/0057C04B2103/302C04B14/106C04B14/06C04B18/08C04B18/142Y02W30/91
Inventor 何伟发王希宏亓熙赵凯黄文海王川行
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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