Low thermal micro-expansive cement based radiation shielding concrete and preparation method thereof

Abstract

The invention belongs to the field of concrete and particularly discloses low thermal micro-expansive cement based radiation shielding concrete and a preparation method thereof. The low thermal micro-expansive cement based radiation shielding concrete is prepared from the following materials in parts by weight: 280-320 parts of cement, 900-1200 parts of fine aggregates, 1200-1500 parts of coarse aggregates, 10-20 parts of a neutron absorber, 0.4-0.6 part of a water reducer and 140-160 parts of water. The concrete accords with the strength requirements for C30 concrete without the segregation phenomenon, is good in slump and divergence, has the bulk density ranging from 2800 kg.m<3> to 2900 kg.m<3>, has the 28d restrained expansion rate ranging from 0.004 percent to 0.007 percent under thewater cultivation condition, has the characteristics of excellent working performance, good radiation shielding performance, low cost and the like at the same time, solves the problems of easiness insegregation, poor homogeneity, poor construction performance and the like of the traditional radiation shielding concrete, is further beneficial to meeting the requirements for the special performanceincluding non shrinkage, micro expansion, low hydration heat and the like of the radiation shielding concrete and is very suitable for large-size radiation shielding concrete engineering.

Description

technical field [0001] The invention belongs to the field of concrete, and specifically discloses a low-heat micro-expansion cement-based anti-radiation concrete and a preparation method thereof. Background technique [0002] Radiation exists throughout the universe and can be divided into natural radiation and artificial radiation. Natural radiation mainly comes from cosmic rays, etc. Artificial radiation mainly comes from α, β, γ, X and neutron streams and other rays produced in the process of applying nuclear technology in nuclear power, military, education, medical treatment, scientific research and other fields. After being exposed to these rays for a long time, it is easy to induce cancer, leukemia, thyroid dysfunction, infertility, birth defects and other diseases, and it is also easy to induce gene mutations in other animals or plants. In order to prevent radiation from harming human beings, when building buildings with radiation sources, it is generally necessary t...

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Problems solved by technology

The annual discharge of copper slag in my country is huge, and most of them are in the state of accumulation and storage. At present, the stock of copper slag in my country has already exceeded 50 million tons, which not only occupies land, pollutes the environment, but also causes a huge waste of resources.

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