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Dry-mixed ground mortar mixed with Bayer process red mud and its application method

A Bayer process red mud and dry mixing technology, applied in the field of building materials, can solve the problems of soil and water pollution, occupation of land resources, etc., and achieve the effects of good strength development, good cohesion, and good wear resistance.

Inactive Publication Date: 2015-11-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, domestic Al 2 o 3 Most of the factories transport red mud to the storage yard, relying on valleys or digging farmland to build dams for wet storage, occupying a large amount of land resources and causing soil and water pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1, a dry-mixed ground mortar mixed with Bayer process red mud, according to ordinary Portland cement 100, Bayer process red mud 15, fly ash 15, cellulose ether 0.03, modified attapulgite 3, can be Redispersed rubber powder 1, water reducer 0.05, defoamer 0.06, retarder 0.02, river sand 405 weight ratio prepared. Add water to 10% of the total mass of the dry-mixed masonry mortar and stir evenly to obtain the desired product. The performance test results are shown in Table 1.

Embodiment 2

[0054] Example 2, a dry-mixed ground mortar mixed with Bayer process red mud, according to ordinary Portland cement 100, Bayer process red mud 20, fly ash 20, cellulose ether 0.08, modified attapulgite 5, can be Redispersed rubber powder 4, water reducer 0.10, defoamer 0.40, retarder 0.04, river sand 450 weight ratio prepared. According to 12% of the total mass of dry-mixed masonry mortar, add water and stir evenly to obtain the desired product. The performance test results are shown in Table 1.

Embodiment 3

[0055] Example 3, a dry-mixed ground mortar mixed with Bayer process red mud, according to ordinary Portland cement 100, Bayer process red mud 40, fly ash 30, cellulose ether 0.10, modified attapulgite 9, can be Redispersed rubber powder 5, water reducer 0.20, defoamer 0.60, retarder 0.10, river sand 550 weight ratio prepared. Add water to 15% of the total mass of the dry-mixed masonry mortar and stir evenly to obtain the desired product. The performance test results are shown in Table 1.

[0056] Table 1 Example performance test results

[0057] Performance Example 1 Example 2 Example 3 Consistency (mm) 50 54 52 Coagulation time (min) 438 405 385 Water retention rate (%) 92.6 92.9 93.6 Bond strength (MPa) 0.8 0.9 0.9 28d compressive strength (MPa) 28.5 28.6 27.8 28d flexural strength (MPa) 7.5 7.8 8.0 28d shrinkage rate (%) 0.042 0.040 0.044

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PUM

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Abstract

The invention belongs to the technical field of a building material, and particularly relates to dry-mixed ground mortar doped with bayer process red mud and an application method thereof. The dry-mixed ground mortar is prepared from common portland cement, bayer process red mud, coal ash, cellulose ether, modified attapulgite, re-dispersible emulsion powder, a water reducer, a defoamer, a retarder and river sand. The product disclosed by the invention has the characteristics of being good in mobility, good in water-retaining property, good in adhesion, good in strength development, small in shrinkage, free of a crack, good in abrasive resistance, good in durability and the like. The product disclosed by the invention is applicable to leveling a building floor, and plays protecting and decorating roles. By adopting the dry-mixed ground mortar, the bayer process red mud can be effectively utilized, the added value of the bayer process red mud is improved, the social benefits are improved, meanwhile, the production cost of the ground mortar is reduced, and the economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a dry-mixed ground mortar mixed with Bayer process red mud and a use method thereof. Background technique [0002] With the rapid development of the construction industry, higher requirements are put forward for the stable quality of building materials and energy conservation and environmental protection. As one of the most important building materials, the advent of ready-mixed mortar (that is, commercial mortar) solves the problems of high labor intensity, unstable quality, low construction efficiency, and pollution of the surrounding environment caused by on-site preparation and mixing of traditional mortar. Ready-mixed mortar is divided into dry-mixed mortar and wet-mixed mortar according to the supply type. At present, most dry-mixed floor mortars on the market have poor fluidity, easy cracking, low strength, large shrinkage, and high cost. These prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 孙振平孙栀子
Owner TONGJI UNIV
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