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Anti-radiation concrete produced from slag aggregate, and production method thereof

A radiation protection and concrete technology, applied in the field of concrete, can solve the problems of adverse effects of concrete durability, increased cracking tendency of concrete, poor homogeneity, etc., so as to improve the shielding performance and service life, reduce the cracking tendency, and reduce the movement rate. Effect

Inactive Publication Date: 2013-07-31
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor homogeneity of radiation-proof concrete will lead to the following problems: First, radiation-proof concrete bears the important responsibility of shielding radiation. If the homogeneity of concrete is poor, the stratification of aggregates will be serious, which will increase the tendency of concrete to crack. Moreover, the uneven distribution of aggregates will lead to more defects such as air pockets, micropores, and interface cracks in the concrete, so that the radiation protection performance of the radiation-proof concrete cannot achieve the expected shielding effect; second, the poor homogeneity of the concrete will lead to After the concrete is hardened, its structure shows microscopic and macroscopic inhomogeneity, which not only reduces the mechanical properties of concrete, but also has a negative impact on the durability of concrete.

Method used

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  • Anti-radiation concrete produced from slag aggregate, and production method thereof
  • Anti-radiation concrete produced from slag aggregate, and production method thereof
  • Anti-radiation concrete produced from slag aggregate, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Select the raw materials according to the raw material ratio in Table 1, pour the cementitious material, coarse aggregate, fine aggregate, tackifier and fiber into the concrete mixer for dry mixing, then add water reducer and water, and continue mixing, that is have to. Its physical performance technical index and linear attenuation coefficient are listed in Table 5 and Table 6.

[0053] Table 1 Ratio of Raw Materials for Radiation-proof Concrete Prepared from Slag Aggregate

[0054]

[0055] Among them, the cement is a mixture of barium cement and ordinary Portland cement, and the blending mass ratio of ordinary Portland cement and barium cement is 5:1; the density of fly ash is 0.8g / cm 3 ~1.1g / cm 3 ;The density of silica fume is 2.0g / cm 3 ~2.4g / cm 3 , the average particle size is 0.16μm-0.19μm; the fine aggregate is high-titanium heavy slag sand and lead powder, the blending mass ratio is 1:3, and the fineness modulus of the fine aggregate is 2.5-3.5; the coars...

Embodiment 2

[0058] Select the raw materials according to the raw material ratio in Table 2, pour the cementitious material, coarse aggregate, fine aggregate, tackifier and fiber into the concrete mixer for dry mixing, then add water reducer and water, and continue mixing, that is have to. Its physical performance technical index and linear attenuation coefficient are listed in Table 5 and Table 6.

[0059] Table 2 Mixing ratio of various raw materials for radiation-proof concrete prepared from slag aggregates

[0060]

[0061] Among them, the cement is barium cement and ordinary Portland cement, and the blending mass ratio of ordinary Portland cement and barium cement is 3:1; the density of fly ash is 0.8g / cm 3 ~1.1g / cm 3 ; Silica fume density 2.0g / cm 3 ~2.4g / cm 3 , the average particle size is 0.16μm-0.19μm, the fine aggregate is high-titanium heavy slag sand and lead powder, the blending mass ratio is 1:2, and the fineness modulus is 2.5-3.5; the coarse aggregate is High-titaniu...

Embodiment 3

[0063] Select the raw materials according to the raw material ratio in Table 3, pour the cementitious material, coarse aggregate, fine aggregate, tackifier and fiber into the concrete mixer for dry mixing, then add water reducer and water, and continue mixing, that is have to. Its physical performance technical index and linear attenuation coefficient are listed in Table 5 and Table 6.

[0064] Table 3 Mixing ratio of various raw materials for radiation-proof concrete prepared from slag aggregates

[0065]

[0066] Among them, the cement is barium cement and ordinary Portland cement, the blending mass ratio of ordinary Portland cement and barium cement is 2:1; the density of fly ash is 0.8g / cm 3 ~1.1g / cm 3 ;The density of silica fume is 2.0g / cm 3 ~2.4g / cm 3 , the average particle size is 0.16μm-0.19μm; the fine aggregate is high-titanium heavy slag sand and lead powder, the blending mass ratio is 1:1, and the fineness modulus of the fine aggregate is 2.5-3.5; the coarse...

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Abstract

The invention relates to anti-radiation concrete produced from slag aggregate, and a production method thereof so as to effectively consume and utilize mineral waste, and improve an anti-radiation performance and durability of concrete. The anti-radiation concrete produced from slag aggregate comprises the following raw materials, by weight, 140-190 parts of water, 350-630 parts of a cementing material, 750-850 parts of a fine aggregate, 1000-1500 parts of a coarse aggregate, 0.35-1.9 parts of a tackifier, 2.1-7.5 parts of a water reducing agent, and 30-70 parts of fibers, wherein the cementing material comprises cement and a mineral admixture, the mineral admixture comprises silicon ash and fly ash, the cementing material comprises 300-500 parts by weight of the cement, 20-60 parts by weight of the silicon ash and 30-70 parts by weight of the fly ash, the coarse aggregate is a high titanium heavy slag coarse aggregate, the fine aggregate comprises high titanium heavy slag sand and lead powder according to a mass ratio of 1:0.2-3.0, the tackifier is methyl cellulose ether, and the fibers are one or a plurality of material selected from polypropylene fibers, steel fibers and lead fibers.

Description

technical field [0001] The invention relates to concrete and a preparation method thereof, belonging to the field of concrete. Background technique [0002] Panzhihua high-titanium heavy slag is a stone material mainly composed of titanium pyroxene, perovskite and other minerals formed by the molten slag produced during the smelting of vanadium-titanium magnetite in Panzhihua Iron and Steel's blast furnace by natural cooling or water cooling in the air. The chemical components of Panzhihua Iron and Steel's high-titanium heavy slag are mainly CaO and SiO 2 、TiO 2 , MgO, Al 2 o 3 , accounting for more than 95% of the total, TiO 2 The content is more than 20%, which makes it very different from ordinary slag in performance. It is not suitable as an external admixture for the production of cement and a mineral admixture for concrete. It is rarely used in concrete and construction mortar. The resource utilization of high-titanium heavy slag is limited above all. At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/12
CPCY02W30/91
Inventor 管理牟廷敏梁毅丁庆军赖长福范碧琨王剑川解超平成荣军杨胜利
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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