Activator and red mud-fly ash cementing material

A technology of cementitious materials and activators, which is applied in the direction of cement production, etc., can solve the problems of low strength and achieve the effects of increased strength, simple process and convenient operation

Active Publication Date: 2018-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low strength, it is usually 1~2MPa

Method used

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  • Activator and red mud-fly ash cementing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides an activator, the activator includes polymerized active aluminum: 15g, sodium hydroxide: 7.5g, sodium silicate: 7.5g, cement: 20g.

[0027] In this embodiment, the polymerized active aluminum is polyaluminum chloride.

[0028] This embodiment also provides a red mud fly ash cementitious material. The raw materials are: 5 kg red mud, 4 kg fly ash, 0.5 kg desulfurized gypsum, 0.5 kg lime, 50 g activator, and 2.75 kg of water required.

[0029] The preparation steps of the red mud fly ash cementitious material are as follows:

[0030] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0031] b. Weigh the activator with a total content of 0.5% of solid raw materials and add it in the form of external mixing and mix it evenly.

[0032] c. Add water in proportion to the evenly mixed dry ingredients, and then fully stir evenly.

Embodiment 2

[0034] This embodiment provides an activator, which includes polymerized active aluminum: 15g, sodium hydroxide: 10g, sodium silicate: 5g, and cement: 20g.

[0035] In this embodiment, the polymerized active aluminum is polymerized aluminum sulfate.

[0036] This embodiment also provides a cementitious material of red mud and fly ash, raw materials: 5 kg of red mud, 4 kg of fly ash, 0.5 kg of desulfurized gypsum, 0.5 kg of lime, 50 g of activator, and 2.78 kg of water required.

[0037] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0038] b. Weigh the activator with a total content of 0.5% of solid raw materials and add it in the form of external mixing and mix it evenly.

[0039] c. Add water in proportion to the evenly mixed dry ingredients, and then fully stir evenly.

Embodiment 3

[0041] This embodiment provides an activator, the activator includes polymerized active aluminum: 15g, sodium hydroxide: 5g, sodium silicate: 10g, cement: 20g.

[0042] In this embodiment, the polymerized active aluminum is polyaluminum chloride.

[0043] This embodiment also provides a cementitious material of red mud and fly ash, raw materials: 5 kg of red mud, 4 kg of fly ash, 0.5 kg of desulfurized gypsum, 0.5 kg of lime, 50 g of activator, and 2.74 kg of water required.

[0044] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0045] b. Weigh the activator with a total content of 0.5% of solid raw materials and add it in the form of external mixing and mix it evenly.

[0046] c. Add water in proportion to the evenly mixed dry ingredients, and then fully stir evenly.

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Abstract

The invention relates to an activator and a red mud-fly ash cementing material. The activator is composed of poly-activated aluminum, NaOH, sodium silicate, and cement according to mass percentages asfollows: 30-35% of the poly-activated aluminum, 10-20% of the NaOH, 10-20% of the sodium silicate, and 35-40% of the cement. The activator is mixed with the red mud-fly ash cementing material according to weight percentage of 0.5-1.5% in order to increase 7-day strength by 15-35% and 28-day strength by 30-50%. The activator can effectively stimulate the activity of the red mud-fly ash cementing material and improve the strength thereof, achieves an object of consuming the industrial wastes, red mud and fly ash, at a large scale, and has great social and economic benefit.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment, in particular to an activator and red mud fly ash gelling material. Background technique [0002] Red mud is a red muddy strong alkaline solid waste that remains after the aluminum industry extracts alumina from bauxite. Its main component is SiO 2 , CaO, Fe 2 o 3 、Al 2 o 3 、Na 2 O, TiO 2 、K 2 Oxide and other oxides, in addition to burning components and trace non-ferrous metals. Red mud is divided into Bayer red mud, sintering red mud or combined red mud due to different production processes. Generally, for every ton of alumina produced, 1.0 to 2.0 tons of red mud will be produced incidentally. "In order to improve the comprehensive utilization rate and technical level of red mud, and reduce the impact of red mud stockpiling on the environment and safety", in 2010, the Ministry of Industry and Information Technology and the Ministry of Science and Technology jo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/24C04B12/00
CPCC04B7/243C04B12/005Y02P40/10
Inventor 陈伟杨腾飞陈潇
Owner WUHAN UNIV OF TECH
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