Radiation-resistant concrete based on environment protection type functional aggregates and preparation method thereof

An environmentally friendly, radiation-proof technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as inability to adapt to design requirements, impossible to meet engineering construction, and prevention of poor neutron rays, etc. Achieve the effects of low ion dissolution rate, low cost, excellent crack resistance and durability

Active Publication Date: 2010-10-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods do not use high-density anti-radiation aggregates, but increase the thickness of concrete to achieve the purpose of shielding radiation, but no matter from the perspective of engineering practice or economic considerations, they cannot meet the requirements, and their ability to prevent neutron radiation is relatively low. Poor, in the new generation nuclear reactor system with high power, large neutron flux, strong radiation, and long life design requirements, this kind of concrete is bound to fail to meet the design requirements
[0004] With the rapid development o...

Method used

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  • Radiation-resistant concrete based on environment protection type functional aggregates and preparation method thereof
  • Radiation-resistant concrete based on environment protection type functional aggregates and preparation method thereof
  • Radiation-resistant concrete based on environment protection type functional aggregates and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Preparation of environment-friendly functional aggregate:

[0034] Take 100 parts (mass) of a lake silt in a city as the main material, add 2 parts (mass) of BaO as an auxiliary material, and then add 1 part (mass) of Na 3 PO 4 Use as a flux, mix evenly, and carry out step-by-step calcination in a high-temperature furnace. The step-by-step calcination system is: heating and holding at 105°C for 30 minutes, heating and holding at 450°C for 45 minutes, heating and holding at 850°C for 30 minutes, and heating and holding at 1100°C for 2 hours. The heating rate of each stage shall not be higher than 10°C / min. After the calcination is completed, it is cooled with the furnace to obtain an environmentally friendly functional aggregate. Determination of its TCLP value is shown in Table 4, and its physical performance index is shown in Table 5.

Embodiment 2～4

[0035] Examples 2-4: Preparation of environment-friendly functional aggregates

[0036] The proportioning of raw materials in each environment-friendly functional aggregate in each embodiment of table 2

[0037]

[0038] The stepped calcination system of each environment-friendly functional aggregate in each embodiment of table 3

[0039]

[0040] With reference to the method of Example 1, select raw materials according to the proportioning of raw materials in Table 2, carry out stepwise calcining according to the stepwise calcining system in Table 3, wherein the heating rate of each stage must not be higher than 10°C / min, after the calcining is completed, follow After cooling in the furnace, the environment-friendly functional aggregate can be obtained. Determination of its TCLP value is shown in Table 4, and its physical performance index is shown in Table 5.

[0041] The TCLP value of environment-friendly functional aggregate in each embodiment of table 4

[0042] ...

Embodiment 5

[0047] Example 5: Preparation of a radiation-proof concrete based on environment-friendly functional aggregates:

[0048] (1) According to the ratio: water 140kg / m 3 , the cementitious material is composed of cement and mineral admixtures, wherein cement is 200kg / m3 [the mixing ratio (mass) of barium cement and ordinary Portland cement is 1:1]; the mineral admixture is fly ash 100kg / m3 m 3 , fine aggregate 1000kg / m 3 [Environment-friendly functional aggregate and lead powder prepared in Example 1, its blending ratio (quality) is 1: 0.5], coarse aggregate 1500kg / m 3 [Environment-friendly functional aggregate and barite prepared in Example 1, its blending ratio (mass) is 1: 1], the dosage of water reducer is 0.6% of the total weight of cementitious material, and the fiber is made of steel fiber and lead-boron polyethylene, wherein the volume dosage of steel fiber is 0.5% of the total volume of the cementitious material, and the volume addition of lead-boron polyethylene fiber...

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Abstract

The invention relates to radiation-resistant concrete based on environment protection type functional aggregates and a preparation method thereof. The radiation-resistant concrete based on environment protection type functional aggregates is characterized in that the radiation-resistant concrete consists of water, gel materials, fine aggregates, coarse aggregates, water reducing agents and fiber,wherein the gel materials consist of cement and mineral admixture, and the fiber consists of steel fiber and lead boron polyethylene fiber, wherein each ingredient has the following mixture ratio: 140 to 160 kg/m<3> of water, 200 to 400 kg/m<3> of cement, 100 to 200 kg/m<3> of mineral admixture, 1000 to 2000 kg/m<3> of fine aggregates and 1500 to 2500 kg/m<3> of coarse aggregates. The mass dopingamount of the water reducing agents accounts for 0.6 to 1.0 percent of the total mass of the gel materials, the volume doping amount of the steel fiber accounts for 0.5 to 1.5 percent of the total volume of the gel materials, and the volume doping amount of the lead boron polyethylene fiber accounts for 0.8 to 1.2 percent of the total volume of the gel materials. The invention has the advantages of environment-friendly effect and low cost. The obtained radiation-resistant concrete has good ray shielding effect, good work performance, good crack resistance performance and good durability performance.

Description

technical field [0001] The invention belongs to the field of radiation shielding building materials, and in particular relates to radiation-proof concrete based on environment-friendly functional aggregates and a preparation method thereof. Background technique [0002] With the increasing maturity of nuclear technology and the rapid development of various nuclear-related industries such as nuclear power, military, medical, scientific research, etc., the radiation dose of rays in the environment is increasing day by day. These rays can induce cancer, leukemia and multiple myeloid cancer, large breast cancer, thyroid dysfunction, infertility, miscarriage and birth defects, etc., and induce genetic mutations in plants, endangering the growth of crops, and It has a long incubation period and cannot be known in a short period of time. Therefore, the research on the preparation of a protective body with excellent protective performance is particularly meaningful. A nuclear prote...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04
CPCC04B2111/00862C04B2111/00017C04B28/04C04B18/02C04B2111/343Y02W30/91C04B7/003C04B14/34C04B14/368C04B14/48C04B16/0625C04B18/08C04B18/142C04B20/0076C04B24/2641C04B40/0028C04B18/0418C04B18/16C04B18/305C04B20/04C04B22/06C04B22/12C04B22/16
Inventor 丁庆军黄修林胡曙光黄绍龙孙华许可王昱
Owner WUHAN UNIV OF TECH
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