High anti-cracking large volume radiation-proof concrete and construction process thereof

A concrete and radiation protection technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of high price, large temperature difference stress, lack of resources, etc., to enhance radiation protection performance, reduce temperature Excellent effect of stress and physical properties

Active Publication Date: 2012-07-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radiation-proof concrete materials still have the following problems: First, the shielding facilities made of radiation-proof concrete are often large-volume concrete buildings with a thickness generally greater than 2m. For this large-volume concrete, its greater thickness will lead to The higher temperature difference between inside and outside leads to a larger temperature difference stress, resulting in a larger tensile stress and cracks on the surface; second, during the long-term service of the concrete ray shielding facility, X, γ and neutron rays are in contact with During the collision and interaction of the various components of concrete, a certain thermal effect will be formed, which will cause local temperature rise and thermal stress in the concrete, which will also cause micro-cracks in the large-volume radiation-proof concrete
However, the use of these aggregates also has the following problems: first, the quantity of these dense natural ores is limited, and a large amount of use will inevitably lead to resource scarcity, and blindly asking for them is not in line with the country's strategic goals for sustainable development; second, steel Duan, iron powder, lead powder, etc. are expensive as a metal material, and are not suitable for large-scale use.
Through investigating the sludge components deposited in some domestic chemical plants, steel plants, paper mills, and electroplating plants, the research group found that the sludge of a sewage treatment plant contained 2.4% of copper ions, 1.0% of zinc ions, and 0.3% of nickel ions The sludge in a steel plant contains 26.2% of manganese ions; the sludge in the tail water of an electroplating plant contains 3.0% of nickel ions and 1.3% of chromium ions, and there is no good resource utilization method for these sludges with high heavy metal content

Method used

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  • High anti-cracking large volume radiation-proof concrete and construction process thereof
  • High anti-cracking large volume radiation-proof concrete and construction process thereof
  • High anti-cracking large volume radiation-proof concrete and construction process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0038] Example 1-3: Preparation of Environmentally Friendly Functional Aggregate

Embodiment 1

[0040] According to the ratio of raw materials in Table 2, take 100 parts (mass) of sewage treatment waste from a certain chemical plant in the city as the main material, add 2 parts (mass) of kaolin as auxiliary materials, mix evenly, and carry out step-by-step calcination in a high-temperature furnace , the calcination system of stepwise calcination is (see Table 3): heat preservation at 105°C for 40 minutes, heat preservation at 450°C for 45 minutes, heat preservation at 850°C for 30 minutes, heat preservation at 1200°C for 40 minutes, and the heating rate of each stage shall not be higher than 10°C / min , After calcination, the environment-friendly functional aggregate can be obtained by cooling with the furnace. The measured physical properties are shown in Table 4, and the TCLP values ​​are shown in Table 5.

[0041] The proportioning of raw materials in each environment-friendly functional aggregate in each embodiment of table 2

[0042]

[0043] The stepped calcinati...

Embodiment 2~3

[0046] With reference to the method of Example 1, select raw materials according to the proportioning of each raw material in Table 2, carry out step-by-step calcination according to the step-by-step calcination system in Table 3, wherein the heating rate of each stage must not be higher than 10C / min, after the calcination is completed, follow The environment-friendly functional aggregate was obtained after cooling in the furnace. The measured physical performance indicators are shown in Table 4, and the TCLP values ​​are shown in Table 5.

[0047] The physical performance index of environment-friendly functional aggregate in each embodiment of table 4

[0048]

[0049] The TCLP value of environment-friendly functional aggregate in each embodiment of table 5

[0050]

[0051] Table 4 shows: the crushing value of the environment-friendly functional aggregate obtained in Examples 1-3 is ≤25%, the water absorption rate is 1-5%, and the apparent density is 2100-2800kg / m 3 ,...

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Abstract

The invention relates to high anti-cracking large volume radiation-proof concrete. The concrete is characterized by comprising water, gelled material, fine aggregate, coarse aggregate, water reducing agent and fibers, wherein the gelled material consists of cement and mineral admixture, and the fibers consist of steel fibers and lead borate polyethylene fibers; and the components have the following proportion: 150 to 170 kg / m<3> of water, 250 to 450 kg / m<3> of cement, 100 to 300 kg / m<3> of mineral admixture, 1,000 to 1,800 kg / m<3> of fine aggregate, 1,500 to 2,200 kg / m<3> of coarse aggregate,water reducing agent in an amount which is 0.6 to 1.2 percent of the total mass of the gelled material, steel fibers in an amount which is 0.5 to 1.5 percent of the total volume of the gelled material, and lead borate polyethylene fibers in an amount which is 0.8 to 1.2 percent of the total volume of the gelled material. The concrete has good physical property and good cracking resistance, and further enhances the radiation resistance.

Description

technical field [0001] The invention belongs to the field of radiation shielding building materials, and in particular relates to a high-crack-resistant large-volume radiation-proof concrete and a construction process thereof. Background technique [0002] With the deepening of the international energy crisis and the looming threat of climate change, nuclear energy, as a clean, efficient and low-carbon energy, is developing steadily in the field of nuclear power generation. Moreover, nuclear facilities are playing an increasingly important role in various fields such as medical treatment, military affairs, and scientific research by virtue of their excellent multifunctional characteristics (detection, life assessment, power generation, etc.). However, due to the problem of ray radiation in nuclear reactors, there are some safety threats to the human body and the surrounding environment. Therefore, while vigorously developing nuclear facilities, it is necessary to conduct in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08
CPCC04B2111/00862C04B2111/00448C04B28/023C04B2103/0017C04B20/1088C04B41/009C04B2111/2038C04B28/04C04B2111/00612C04B2111/343C04B41/46C04B41/4598C04B18/023Y02W30/91C04B7/003C04B14/368C04B14/48C04B16/0625C04B18/08C04B18/142C04B20/008C04B20/0096C04B22/04C04B24/2641C04B40/0028C04B40/0067C04B40/0286C04B7/02C04B2103/302C04B14/10C04B14/106C04B18/04C04B18/0418
Inventor 丁庆军黄修林胡曙光杨堃孙华王发洲吕林女何永佳
Owner WUHAN UNIV OF TECH
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