Gelled material for improving properties of fly ash-based inorganic polymer and preparation method thereof

An inorganic polymer, composite cementitious material technology, applied in solid waste management, climate sustainability, sustainable waste treatment, etc., can solve the problems of poor flexural strength and low compressive strength, and achieve easy operation, no The effect of three waste discharge, reducing environmental pollution and huge pressure on ecological balance

Inactive Publication Date: 2010-09-08
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0039] 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 metasilicate as an activator, or further using styrene-butyl acrylate-acrylic acid terpolymer resin emulsion as a structural modifier, prepares a glue that improves the performance of fly ash-based inorganic polymers. Concrete materials, improve the brittleness of inorganic geopolymer materials, and enhance their toughness

Method used

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  • Gelled material for improving properties of fly ash-based inorganic polymer and preparation method thereof
  • Gelled material for improving properties of fly ash-based inorganic polymer and preparation method thereof
  • Gelled material for improving properties of fly ash-based inorganic polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Accurately weigh 1350 grams of fly ash, 150 grams of silicon fume, and 225 grams of activator sodium metasilicate (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 sodium metasilicate contained crystal water 128 grams 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 shaped cementitious material with improved properties of the fly ash-based inorganic polymer.

[0090] 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...

Embodiment 2

[0096] Accurately weigh 1350 grams of fly ash, 150 grams of silicon fume, and 300 grams of activator sodium metasilicate (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, and this water yield is to deduct sodium metasilicate contained crystal water 171 grams 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 shaped cementitious material with improved properties of the fly ash-based inorganic polymer.

[0097] 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...

Embodiment 3

[0104] Accurately weigh 1350 grams of fly ash, 150 grams of silicon fume, and 300 grams of activator sodium metasilicate Na 2 SiO 2 9H 2 O dissolved in 264 grams of water (water+Na 2 SiO 2 9H 2Water of crystallization in O: fly ash and silica fume=0.29, this water yield is to deduct 171 grams of water of crystallization contained in sodium metasilicate in total water consumption 435 grams), styrene-butyl acrylate-acrylic acid ternary copolymerization 7.5 grams (0.5% of the weight of the fly ash silica fume) of the compound resin emulsion. At room temperature, pour the activator aqueous solution into a double-rotation and double-speed slurry mixer, and then add the uniformly mixed fly ash and silicon powder for stirring, and slowly add styrene-butyl acrylate-acrylic acid ternary copolymerization during the stirring process The product resin emulsion is formed into a uniformly mixed slurry; the slurry is filled into a 40mm × 40mm × 160mm iron triple mold. Vibrate on a mort...

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Abstract

The invention discloses a gelled material for improving mechanical properties of a fly ash-based inorganic polymer and a preparation method thereof. The gelled material comprises the following raw materials: 1,350 grams of fly ash, 150 grams of silicon powder, 225 or 300 grams of sodium metasilicate and 307 or 264 grams of water, wherein the ratio of the summation of the water and crystal water in the Na2SiO2.9H2O to the summation of the fly ash and the silicon powder is equal to 0.29; the weight of a styrene-butyl acrylate-acrylic acid terpolymer resin emulsion is 0.5 to 3 percent of that of the fly ash and the silicon powder; the sodium metasilicate is used for exciting the binary combination of the fly ash and the silicon powder; or the terpolymer resin emulsion is doped into the binary combination of the fly ash and the silicon powder excited by the sodium metasilicate to prepare the gelled material at the room temperature. The optimal compression strength during the 28-day age of the gelled material is increased by 16.08 MPa compared with that of the fly ash-based inorganic polymer, and the rupture strength during the 28-day age of the gelled material is increased by 3.32 MPa. The doping of the terpolymer resin emulsion can significantly improve the mechanical properties of the fly ash-based gelled material. The gelled material is prepared in an environment-friendly mode which needs no heating, does not cause three-waste discharge and has a simple process.

Description

technical field [0001] The invention belongs to the field of organic and inorganic composite materials, and in particular relates to a preparation method of organic polymer resin emulsion and fly ash (inorganic aluminosilicate) under the action of an alkaline activator to generate an inorganic polymer composite gelling material . Background technique [0002] Fly ash is the dust collection ash discharged 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 was 125 million tons. In 2000, it was about 150 million tons, and by 2010 it will reach 400 million tons. For a long time to come, thermal power generation will still be the mainstream of my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCC04B2111/00017C04B28/26Y02W30/91C04B18/08C04B22/02C04B24/2676C04B40/0028
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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