Novel anti-radiation ultra-high-performance concrete and preparation method thereof
An ultra-high-performance concrete technology, applied in the field of radiation-proof concrete, can solve the problems of low strength and good radiation-proof performance, and achieve the effects of high density, excellent radiation resistance, and satisfactory static and dynamic compressive strength
Active Publication Date: 2021-12-10
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology
However, the radiation-proof concrete prepared at present generally has the problems of good radiation-proof performance and low strength.
Method used
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Embodiment 1
[0047] Use magnetite powder to replace 20%, 40%, 60%, 80% and 100% of fine aggregate in UHPC respectively to prepare MUHPC, which are respectively recorded as R20, R40, R60, R80 and R100; no magnet is used The UHPC of mineral powder is R0.
[0048]When the magnetite powder is equal to the volume of fine aggregate, the improved Andreasen&Andersen (A&A) model is used, see formula (1), and the dense particle packing skeleton is designed. By using MATLAB software to adjust the proportion of each material, the synthetic mixture and the target curve to achieve the best fit. On the basis of constant volume replacement, magnetite powder with different replacement levels of 20%, 40%, 60%, 80% and 100% was used to replace fine aggregate to obtain the mixing ratio of MUHPC.
[0049]
[0050] In the formula (1), D represents the particle size (mm), P(D) represents the solid fraction smaller than the size D, and D max Indicates the maximum size of the particles used (mm), D min Repre...
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Abstract
The invention discloses novel anti-radiation ultra-high-performance concrete and a preparation method thereof, belonging to the technical field of anti-radiation concrete. The novel anti-radiation ultra-high-performance concrete is prepared by partially or completely replacing fine aggregate in the ultra-high-performance concrete with magnetite powder in an isometric manner. The ultra-high-performance concrete is prepared from the following raw materials: a cementing material, fine aggregate, a high-efficiency water reducing agent, water and high-tensile-strength fibers. According to the invention, the magnetite powder is used for partially or completely replacing the fine aggregate in the ultra-high-performance concrete in the isometric manner, so the prepared MUHPC has high density, excellent radiation resistance, good working performance, satisfactory static and dynamic compressive strength and good high temperature resistance.
Description
technical field [0001] The invention relates to the technical field of radiation-proof concrete, in particular to a novel radiation-proof ultra-high performance concrete and a preparation method thereof. Background technique [0002] Currently, different radiation sources and instruments are widely used in various medical and research centers, petrochemical and oil refining industries, nuclear power plants, agriculture and other fields. At the same time, nuclear shielding technology has also received great attention from the public. In general, gamma rays and neutron rays are the most damaging types of radiation released by nuclear explosions or radioactive waste. The danger of these radiations stems primarily from their high osmotic and ionizing energies, which can damage normal human cells and cause genetic mutations. Long-term exposure to nuclear radiation can cause people to suffer from decreased immunity, cancer, and even immediate death. Therefore, effective radiatio...
Claims
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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00258C04B2201/20C04B2201/52C04B18/146C04B18/08C04B14/48C04B14/06C04B18/12C04B2103/302Y02W30/91
Inventor 吕亚军管俊峰白卫峰陈记豪秦一鸣樊付军徐军翔
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER