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Fly ash-based inorganic polymer composite cementitious material and preparation method thereof

A technology of composite cementitious materials and inorganic polymers, applied in solid waste management, sustainable waste treatment, cement production, etc., can solve problems such as low compressive strength and poor flexural strength, and achieve the effect of improving pore structure

Inactive Publication Date: 2010-08-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0038] Aiming at the problems that existing alkali-activated fly ash-based inorganic polymer cementitious materials generally have low compressive strength and poor flexural strength under the room temperature curing system, the purpose of the present invention is to use fly ash as the main raw material and mix A small amount of silicon powder, using sodium silicate as an activator, or further using butyl acrylate-acrylic resin emulsion as a structural modifier, prepares a resin emulsion-reinforced and toughened inorganic polymer composite gelling material to improve inorganic geopolymer The brittleness of the material enhances its toughness

Method used

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  • Fly ash-based inorganic polymer composite cementitious material and preparation method thereof
  • Fly ash-based inorganic polymer composite cementitious material and preparation method thereof
  • Fly ash-based inorganic polymer composite cementitious material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Accurately weigh 1350 grams of fly ash, 150 grams of silicon fume, and 225 grams of activator sodium silicate (Na 2 SiO 2 9H 2 O) dissolved in 307 grams of water (water+Na 2 SiO 2 9H 2 Water of crystallization in O: fly ash and silicon powder=0.29, and this water yield is to deduct 128 grams of water of crystallization contained in sodium silicate in 435 grams of total water consumption). At room temperature, pour the activator aqueous solution into a double-rotation and double-speed slurry mixer, and then add the well-mixed fly ash and silicon powder for mixing to form a well-mixed slurry; put the slurry into a 40mm×40mm ×160mm iron triple mold. Vibrate on a mortar vibrating table, and scrape it flat with a scraper to obtain a formed fly ash-based inorganic polymer gelling material.

[0089] The molded specimens were cured at room temperature for 24 hours, and after demoulding, they were cured at room temperature for 3 days (3d), 7 days (7d), 28 days (28d) and ot...

Embodiment 2

[0095] Accurately weigh 1350 grams of fly ash, 150 grams of silicon fume, and 300 grams of activator sodium silicate (Na 2 SiO 2 9H 2 O) dissolved in 264 grams of water (water+Na 2 SiO 2 9H 2 Water of crystallization in O: fly ash and silicon powder=0.29, this water yield is to deduct sodium silicate contained crystal water 171 grams in total water consumption 435 grams). At room temperature, pour the activator aqueous solution into a double-rotation and double-speed slurry mixer, and then add the well-mixed fly ash and silicon powder for mixing to form a well-mixed slurry; put the slurry into a 40mm×40mm ×160mm iron triple mold. Vibrate on a mortar vibrating table, and scrape it flat with a scraper to obtain a formed fly ash-based inorganic polymer gelling material.

[0096] The molded specimens were cured at room temperature for 24 hours, and after demoulding, they were cured at room temperature for 3 days (3d), 7 days (7d), 28 days (28d) and other different ages, and ...

Embodiment 3

[0103] Accurately weigh 1350 grams of fly ash, 150 grams of silicon fume, and 300 grams of activator sodium silicate (Na 2 SiO 2 9H 2 O) dissolved in 264 grams of water (water+Na 2 SiO 2 9H 2 Water of crystallization in O: fly ash and silica fume, this water yield deducts 171 grams of crystal water contained in sodium silicate in 435 grams of total water consumption), and the butyl acrylate-acrylic resin emulsion dosage is 7.5 grams (for 0.5% of the weight of fly ash silica fume). At room temperature, pour the activator aqueous solution into a double-rotation double-speed slurry mixer, then add the well-mixed fly ash and silicon powder for mixing, and slowly add butyl acrylate-acrylic resin emulsion during the mixing process to form a uniform mixture The slurry; put the slurry into a 40mm × 40mm × 160mm iron triple mold. Vibrate on a mortar vibrating table, and scrape it flat with a scraper to obtain a formed fly ash-based inorganic polymer gelling material.

[0104]The...

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Abstract

The invention relates to a fly ash-based inorganic polymer composite cementitious material and a preparation method thereof, and the fly ash-based inorganic polymer composite cementitious material comprises the following raw materials: 1350g of fly ash, 150g of silicon powder, 225 or 300g of sodium silicate and 307 or 264g of water (water + crystal water in Na2SiO29H2O: fly ash and silicon powder is equal to 0.29), wherein the doping amount of butyl acrylate-acrylic resin emulsion is 0.5%-3% of the weight of the fly ash and the silicon powder. The fly ash-based inorganic polymer composite cementitious material is prepared by using the sodium silicate for exciting the binary complex fly ash and the silicon powder at room temperature or doping the butyl acrylate-acrylic resin emulsion into the binary complex fly ash and the silicon powder excited by the sodium silicate at the room temperature. The optimal compressive strength at the age of 28 days is improved by 10.43MPa in comparison with a binary complex fly ash-based inorganic polymer, and the flexural strength at the age of 28 days is improved by 2.52MPa. The doping of the butyl acrylate-acrylic resin emulsion can significantly improve the compressive strength and the flexural strength of the fly ash-based inorganic polymer composite cementitious material; and the preparation process is carried out under normal temperature and normal pressure and has the advantages of zero emission, greenness and environmental protection.

Description

technical field [0001] The invention belongs to the field of organic-inorganic composite materials, and specifically relates to an inorganic polymer composite gelling material and a preparation method thereof under the action of an alkaline activator, or further butyl acrylate-acrylic resin emulsion and fly ash silicon The inorganic aluminosilicate provided by the gray is under the action of an alkaline activator to generate an inorganic polymer composite gel material and a preparation method thereof. Background technique [0002] Fly ash is the waste residue collected by the dust collector after the pulverized coal of the thermal power plant enters the coal-fired boiler at 1300-1500 °C. In recent years, my country's energy industry has developed steadily, with an annual growth rate of 7.3% in power generation capacity. The rapid development of the power industry has brought about a sharp increase in the amount of fly ash emissions. In 1995, the amount of fly ash emissions w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCC04B2201/50C04B2111/00017C04B28/26C04B28/006Y02P40/10Y02W30/91C04B14/06C04B18/08C04B24/2641C04B12/04C04B18/146
Inventor 张耀君王亚超徐德龙刘礼才桂根生郭卫鹏陈笃平靳朝
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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