A kind of ettringite anti-radiation concrete

An ettringite and concrete technology, which is applied in the field of concrete, can solve the problems of affecting the safety effect of nuclear waste solidification, unfavorable resource sustainable utilization, poor construction performance, etc., and achieves convenient implementation, improved radiation protection performance, and good compatibility Effect

Inactive Publication Date: 2020-12-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned mineral materials are natural materials in short supply. Excessive mining is not conducive to the sustainable utilization of resources. Moreover, when these materials are used as aggregates, the bulk density is much higher than that of ordinary stone aggregates, which is easy to cause concrete segregation, poor construction performance, and easy cracking. Solidification safety effect of waste

Method used

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  • A kind of ettringite anti-radiation concrete
  • A kind of ettringite anti-radiation concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A kind of ettringite anti-radiation concrete comprises following raw materials and preparation steps in weight fraction:

[0020] (1) Primary hydration: Grind tricalcium aluminate until the specific surface area is 400m 2 / kg; weigh 20 parts of tricalcium aluminate, 20 parts of water, 7 parts of calcium oxide and 7 parts of gypsum, mix evenly, and cure at 30°C for 20 hours at a time;

[0021] (2) Secondary hydration: After the first curing, dry and grind at 60°C, then add 20 parts of tricalcium aluminate, 20 parts of water, 7 parts of calcium oxide and 7 parts of gypsum, mix again, and dry at 30°C for the second time Conservation for 5 days;

[0022] (3) Preparation of fine aggregate: After drying at 40°C, ettringite crystals are obtained; through a 2.36mm sieve, the material under the sieve is ready for use, and the material on the sieve is ettringite fine aggregate;

[0023] (4) Coarse aggregate preparation: Mix and stir 10 parts by weight of high-iron aluminophosph...

Embodiment 2

[0025] A kind of ettringite anti-radiation concrete comprises following raw materials and preparation steps in weight fraction:

[0026] (1) Primary hydration: Grind tricalcium aluminate until the specific surface area is 500m 2 / kg; Weigh 50 parts of tricalcium aluminate, 30 parts of water, 15 parts of calcium oxide and 15 parts of gypsum, mix them evenly, and cure at 55°C for 12 hours;

[0027] (2) Secondary hydration: After the first curing, dry and grind at 40°C, then add 50 parts of tricalcium aluminate, 30 parts of water, 15 parts of calcium oxide and 15 parts of gypsum, mix again, and dry at 55°C for the second time Conservation for 5 days;

[0028] (3) Preparation of fine aggregate: After drying at 60°C, ettringite crystals are obtained; through a 2.36mm sieve, the material under the sieve is ready for use, and the material on the sieve is ettringite fine aggregate;

[0029] (4) Coarse aggregate preparation: Mix and stir 25 parts by weight of high-iron aluminophospha...

Embodiment 3

[0031] A kind of ettringite anti-radiation concrete comprises following raw materials and preparation steps in weight fraction:

[0032] (1) Primary hydration: Grind tricalcium aluminate until the specific surface area is 450m 2 / kg; Weigh 40 parts of tricalcium aluminate, 25 parts of water, 12 parts of calcium oxide and 10 parts of gypsum, mix them evenly, and cure at 40°C for 15 hours at a time;

[0033] (2) Secondary hydration: After the first curing, dry and grind at 50°C, then add 40 parts of tricalcium aluminate, 25 parts of water, 12 parts of calcium oxide and 10 parts of gypsum, mix again, and dry at 45°C for the second time 4 days of maintenance;

[0034] (3) Preparation of fine aggregate: After drying at 50°C, ettringite crystals are obtained; through a 2.36mm sieve, the material under the sieve is set aside, and the material on the sieve is ettringite fine aggregate;

[0035] (4) Coarse aggregate preparation: Mix and stir 20 parts by weight of high-iron aluminopho...

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Abstract

The invention provides ettringite radiation shield concrete. The ettringite radiation shield concrete is prepared from the following raw materials in parts by weight: 10 to 20 parts of water, 30 to 50parts of high iron phosphoaluminate cement, 30 to 65 parts of fine aggregate, 35 to 70 parts of coarse aggregate, 0.1 to 1 part of a water reducing agent and 2 to 5 parts of fibers, wherein main components of the coarse aggregate and the fine aggregate are ettringite; meanwhile, the invention also provides a preparation method of the coarse and fine aggregate. The ettringite radiation shield concrete disclosed by the invention takes the coarse and fine aggregate as main components, wherein the raw materials mainly comprise the ettringite, hydrated phosphoaluminate mineral and hydrated chlorate mineral; all the raw materials are cement hydration products, so that the aggregate has good compatibility with cement paste in the concrete and radiation-proof property of the concrete is improved.

Description

technical field [0001] The invention relates to concrete, in particular to an ettringite radiation-proof concrete. Background technique [0002] As a protective material for particle accelerators, devices containing radioactive sources and atomic energy reactors, radiation-proof concrete is also called radiation-proof concrete, shielding concrete and atomic energy protective concrete. Magnetite, limonite and barite are generally used as aggregates, and the density is not less than 3300kg / m 3 , can effectively shield the gamma rays and neutron rays produced by nuclear reactions. However, the above-mentioned mineral materials are natural materials in short supply. Excessive mining is not conducive to the sustainable utilization of resources. Moreover, when these materials are used as aggregates, the bulk density is much higher than that of ordinary stone aggregates, which is easy to cause concrete segregation, poor construction performance, and easy cracking, which seriously ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34C04B18/02
CPCC04B18/021C04B28/344C04B2111/00258C04B2201/20C04B2201/50C04B22/002C04B2103/302C04B16/0625C04B14/36C04B20/0076
Inventor 宫晨琛周竞平吴波芦令超
Owner UNIV OF JINAN
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