Composite gelate material and preparation method thereof

A technology of composite cementitious materials and auxiliary materials, applied in the field of building materials, can solve the problems of large resource consumption and energy performance, and achieve the effects of high labor productivity, simple production process, and low environmental pollution

Inactive Publication Date: 2009-03-18
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Portland cement is currently the most widely used cementitious material. Due to the large amount of resources and energy consumed in the production process of Portland cement, the discharge contains a large amount of substances that pollute the environment, and some performance defects, it faces sustainable development challenge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Crush the coal gangue to less than 10mm, calcinate at 780°C, and keep it warm for 1.5 hours. Surface area 370m 2 / kg; then add the specific surface area of ​​460m 2 / kg fly ash and organic additives (methyl cellulose and wood sodium), mix evenly to obtain a composite cementitious material. Burning coal gangue: fly ash: inorganic auxiliary materials: organic additives = 60:20:20:2 (weight ratio).

[0020] After testing, the prepared gelling material had an initial setting time of 262 minutes and a final setting time of 376 minutes. The 3d compressive strength of the mortar test body is 12.3MPa, and the 28d compressive strength is 33.2MPa.

Embodiment 2

[0022] Crush the coal gangue to less than 10mm, calcinate at 780°C, and keep it warm for 1.5 hours. The calcined coal gangue is quenched with wind, and the cooled burned coal gangue is ground together with non-auxiliary materials (quicklime, gypsum and sodium silicate) Up to a specific surface area of ​​370m 2 / kg; then add the specific surface area of ​​490m 2 / kg slag powder and organic additives (methyl cellulose, and wood sodium), and mix evenly to obtain a composite cementitious material. Burning coal gangue: slag: inorganic additives: organic additives = 50:30.20:2 (weight ratio). After testing, the prepared gelling material had an initial setting time of 162 minutes and a final setting time of 252 minutes. The 3d compressive strength of the mortar test body is 17.6MPa, and the 28d compressive strength is 36.8MPa.

Embodiment 3

[0024] Crush the coal gangue to less than 10mm, calcinate at 800°C, and keep it warm for 1 hour. The calcined coal gangue is quenched with wind, and the cooled coal gangue is powdered together with inorganic auxiliary materials (slaked lime, desulfurized gypsum and sodium silicate). Grind to a specific surface area of ​​350m 2 / kg; then add the specific surface area of ​​490m 2 / kg slag powder, 460m 2 / kg fly ash and organic additives (hydroxyethyl cellulose, wood sodium), mix evenly to obtain a composite cementitious material. Burning coal gangue: slag: fly ash: inorganic auxiliary material: organic additive = 50: 30: 20: 25: 2.5 (weight ratio).

[0025] After testing, the prepared gelling material had an initial setting time of 192 minutes and a final setting time of 316 minutes. The 3d compressive strength of the mortar test body is 16.4MPa, and the 28d compressive strength is 35.8MPa.

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Abstract

The invention relates to a composite gel material, which comprises main materials, inorganic auxiliary materials and organic additives, wherein the main materials comprise calcining gangue powder and at least one of blast furnace slag and fly ash; the inorganic auxiliary materials are one or at least one of calcium lime, hydrated lime, sodium silicate, sodium sulphate, sodium sulphite and gypsum, and the organic additives are one or at least one of methyl cellulose, methylol cellulose, emulsion powder, sodium lignosulphonate and calcium lignosulphonate; the weight portion compositions of all materials are as follows: 30 to 70 portions of calcining gangue powder, 20 to 50 portions of blast furnace slag, 20 to 50 portions of fly ash, 5 to 20 portions of inorganic auxiliary material and 0.5 to 5 portions of organic additive. The material has the advantages of the utilization of a great amount of industrial waste residue, simple preparation process, environmental protection and energy conservation, low cost and use as a substitute for conventional silicate cement in construction projects, sea wall projects, rush-repair projects, river bank protection projects or concrete products.

Description

technical field [0001] The invention relates to a composite cementitious material with coal gangue, slag and fly ash as main raw materials and a preparation method thereof, which can be used as a cement substitute and belongs to building materials. Background technique [0002] Portland cement is currently the most widely used cementitious material. Due to the large amount of resources and energy consumed in the production process of Portland cement, the discharge contains a large amount of substances that pollute the environment, and some performance defects, it faces The challenge of sustainable development. Limestone, the raw material for cement production, has proven domestic reserves of about 64.3 billion tons. In 2006, my country's cement output reached 1.1 billion tons, and in 2007 it reached 1.36 billion tons. According to this development speed, it is estimated that within 50 years, the limestone resources used in my country's cement production will face the danger...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B18/14C04B18/08
CPCC04B2111/00017C04B2111/72C04B40/0046C04B2111/00732C04B18/12Y02W30/91C04B12/04C04B18/08C04B18/141C04B20/026C04B22/064C04B22/14C04B22/143C04B22/147C04B24/18C04B24/26C04B24/383C04B28/08C04B40/00C04B20/0076C04B20/02C04B20/04
Inventor 张长森吴其胜
Owner YANCHENG INST OF TECH
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