High-fluidity neutron-radiation-resistant concrete and preparation method thereof

Abstract

The invention discloses high-fluidity neutron-radiation-resistant concrete and a preparation method thereof. The concrete comprises mixing water, a cementing material, serpentine fine aggregate, serpentine coarse aggregate and a polycarboxylate-type water reducer, and the cementing material is prepared from cement, metakaolin and coal ash microbeads; the mass of the above components is as follows:the the mass of the mixing water is 188-210 parts, the mass of the cement is 425-475 parts, the mass of the metakaolin is 25 parts, the mass of the coal ash microbeads is 50 parts, the mass of the serpentine fine aggregate is 6-70 parts, the mass of the serpentine coarse aggregate is 930-960 parts, and the mass of the polycarboxylate-type water reducer is 1.0-1.2% of that of the cementing material. The hydrogen content of the crystal water in the finished concrete is not less than 1.4% of the mass of the dried concrete, the strength is not less than 30 MPa, and the slump is greater than 200 mm. The high-fluidity neutron-radiation-resistant concrete has the characteristics of high crystal water content, good concrete working performance and convenience in construction, and the concrete prepared by the invention has high practicability and can be popularized and applied to nuclear radiation shielding construction on a large scale.

Description

technical field [0001] The invention belongs to the technical field of nuclear power engineering, and in particular relates to a large fluidity anti-neutron radiation concrete and a preparation method thereof. Background technique [0002] Shielding neutron flow mainly depends on adding light elements (hydrogen, boron, lithium and other elements) in materials, which can effectively absorb neutron radiation energy and prevent secondary radiation. Concrete itself has a certain ability to prevent neutron radiation, and the coarse aggregate in it is replaced with serpentine rich in stable crystal water, so that it can be used for better anti-neutron radiation ability. Serpentine contains about 13% of crystal water, and the loss of crystal water is less than 0.1% when burned at 450 degrees Celsius. However, due to the particularity of aggregates, serpentine concrete is currently facing problems of low strength and poor working conditions. Problems, or high strength and poor work...

AI Technical Summary

Problems solved by technology

Serpentine contains about 13% of crystal water, and the loss of crystal water is less than 0.1% when burned at 450 degrees Celsius. However, due to the particularity of aggregates, serpentine concrete is currently facing problems of low strength and poor working conditions. problems, or high strength and poor work performance, good work performance and low strength, it is difficult to reconcile the two

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