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Method for preparing radiation-resistant concrete from lead-containing CRT (cathode ray tube) glass

A concrete and radiation protection technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as pollution of the environment, achieve the promotion of absorption, be beneficial to resource recycling and environmental protection, and satisfy the ray absorption capacity. Effect

Inactive Publication Date: 2014-12-03
BEIJING UNIV OF TECH +2
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  • Abstract
  • Description
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Problems solved by technology

[0015] China has as many as 40 nuclear power plants under construction and to be built, and each nuclear power plant requires at least 500,000 cubic meters of radiation-proof concrete. If lead-containing CRT glass replaces barite, magnetite, limonite and other ray-absorbing materials, 1 cubic Radiation concrete will consume 1.1-1.75 tons of lead-containing CRT glass, which means that each nuclear power plant will need 550,000-875,000 tons of lead-containing CRT glass. 30 million tons, the demand will be greater than the 2.4 million tons of lead-containing CRT glass in my country. Therefore, the preparation of radiation-proof concrete with lead-containing CRT glass for the construction of nuclear power plants not only solves the problem of CRT polluting the environment, but also turns waste into treasure. , saving resources

Method used

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  • Method for preparing radiation-resistant concrete from lead-containing CRT (cathode ray tube) glass
  • Method for preparing radiation-resistant concrete from lead-containing CRT (cathode ray tube) glass
  • Method for preparing radiation-resistant concrete from lead-containing CRT (cathode ray tube) glass

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Effect test

Embodiment 1

[0035] A method for preparing radiation-proof concrete from leaded CRT glass, firstly, clean leaded CRT glass is broken, including cone glass, neck tube glass and low melting point sealing glass, and the lead oxide mass content average value of leaded CRT glass can be Up to 23.5%, 6-30mm is used as coarse aggregate, 6mm or less is used as fine aggregate, the size of stones is controlled at 10-30mm, and the size of sand is less than 1.5mm.

[0036] Ratio of anti-radiation concrete prepared with leaded CRT glass (unit: kg): P.O 42.5 ordinary portland cement 300, fly ash 200, coarse particle leaded CRT glass 900, fine particle leaded CRT glass 850, fine particle boron glass 20, polycarboxylate superplasticizer 20, water 150. Wherein the chemical composition of boron-containing glass is (wt%): SiO 2 50, Al 2 o 3 16,B 2 o 3 25,Li 2 O 1,Na 2 O 1,K 2 O 3, CaO 1, MgO 1, BaO 2, SrO 1, ZnO 1.

[0037] Preparation process: weigh stones, leaded CRT glass in particle form, leaded ...

Embodiment 2

[0039] A method for preparing radiation-proof concrete from leaded CRT glass, firstly, clean leaded CRT glass is broken, including cone glass, neck tube glass and low melting point sealing glass, and the lead oxide mass content average value of leaded CRT glass can be Up to 23.8%, 6-30mm is used as coarse aggregate, 6mm or less is used as fine aggregate, the size of stone is controlled at 10-30mm, and the size of sand is less than 1.5mm.

[0040] Ratio of anti-radiation concrete prepared with leaded CRT glass (unit: kg): P.O 42.5 ordinary Portland cement 330, fly ash 170, gravel 100, coarse grained leaded CRT glass 800, sand 100, fine grained grained leaded CRT glass 700, fine particle boron glass 23, polycarboxylate superplasticizer 17, water 160. Wherein the chemical composition of boron-containing glass is (wt%): SiO 2 64, Al 2 o 3 6,B 2 o 3 9, Li 2 O 3 , Na 2 O 12,K 2 O 3, CaO 0.3, MgO 0.4, BaO 1, SrO 0.7, ZnO 0.6.

[0041] Preparation process: weigh stones, leade...

Embodiment 3

[0043] A method for preparing radiation-proof concrete from leaded CRT glass, firstly, clean leaded CRT glass is broken, including cone glass, neck tube glass and low melting point sealing glass, and the lead oxide mass content average value of leaded CRT glass can be Up to 23.5%, 6-30mm is used as coarse aggregate, 6mm or less is used as fine aggregate, the size of stones is controlled at 10-30mm, and the size of sand is less than 1.5mm.

[0044] Ratio of anti-radiation concrete prepared by leaded CRT glass (unit: kg): P.O 42.5 ordinary portland cement 400, fly ash 100, stone 200, coarse grained leaded CRT glass 700, sand 200, fine grained leaded CRT glass 600, fine particle boron glass 26, polycarboxylate superplasticizer 13, water 170. Wherein the chemical composition of boron-containing glass is (wt%): SiO 2 70,Al 2 o 3 5,B 2 o 3 6, Li 2 O2, Na 2 O 3,K 2 O2, CaO2, MgO1, BaO6, SrO2, ZnO1.

[0045]Preparation process: weigh stones, leaded CRT glass in the form of pa...

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Abstract

The invention relates to a method for preparing radiation-resistant concrete from lead-containing CRT (cathode ray tube) glass. The radiation-resistant concrete can be as a shielding material for absorbing and shielding nuclear power station rays, and is beneficial to resource circulation and environmental protection. The substitution of CRT display products with TFT-LCD (thin film transistor-liquid crystal display) electronic display products results in mass rejection of the CRT display products; and CRT glass is the main component for CRT display, and the lead-containing CRT glass has potential environmental pollution and belongs to hazard solid wastes. According to the invention, the lead-containing CRT glass is prepared into the radiation-resistant concrete to satisfy the use of nuclear island construction for nuclear power stations. The radiation-resistant concrete is prepared from 300-400kg of P.O 42.5 ordinary Portland cement, 100-200kg of fly ash, 0-300kg of gravel, 600-900kg of coarse-particle lead-containing CRT glass, 500-850kg of fine-particle lead-containing CRT glass, 0-300kg of sand, 20-30kg of fine-particle borate glass, 10-20kg of polycarboxylic acid water reducer and 150-180kg of water.

Description

technical field [0001] The invention relates to a method for preparing radiation-proof concrete by using lead-containing CRT glass, which can be applied to protective materials for absorbing and shielding nuclear power plant rays, and is beneficial to resource recycling and environmental protection. Background technique [0002] From the 1950s to the beginning of the 21st century, cathode ray tube (Cathode Ray Tube, CRT) electronic display technology was widely used in products such as televisions, monitors, industrial monitors and oscilloscopes. CRT is the core component of CRT display products. CRT It is mainly composed of glass and electron gun. The glass is called CRT glass, which is in the shape of a cone and accounts for more than 98% of the mass. CRT-type display products promote and promote the way of media communication, and have made great contributions to the development of human civilization. [0003] After 2006, with the maturity of TFT-LCD (Thin Film Transist...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/04
CPCY02W30/91
Inventor 田英良崔素萍刘文才孙诗兵符寒光王毅李金惠温宗国胡亚春付玉生王健
Owner BEIJING UNIV OF TECH
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