Application of coral sand and/or coral bone in preparation of low-radioactivity building material

A construction material and low radioactivity technology, applied in the field of preparation of low radioactivity construction materials, can solve the problems of lack of radioactivity level measurement and ionizing radiation evaluation, and achieve the effect of overcoming the shortage of building raw materials and reducing the cost of sea transportation

Inactive Publication Date: 2020-08-07
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, compared with the radioactivity level measurement and ionizing radiation evaluation of land building materials, the radioactivity level measurement and ionizing radiation evaluation of building materials in the South China Sea are relatively scarce

Method used

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  • Application of coral sand and/or coral bone in preparation of low-radioactivity building material
  • Application of coral sand and/or coral bone in preparation of low-radioactivity building material
  • Application of coral sand and/or coral bone in preparation of low-radioactivity building material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A low-radioactive concrete for construction, prepared from coal ash, ordinary Portland cement, natural seawater, polycarboxylate water reducer, and coral sand at a mass ratio of 0.3:1:0.3:0.02:0.06, prepared The method includes the following steps:

[0038] (1) the coral sand is crushed into particles with a particle diameter of 0.5 mm to obtain component A;

[0039] (2) pulverizing coal ash into particles with a particle diameter of 10 mm to obtain component B;

[0040] (3) Put component A and component B in a concrete mixer and dry mix them for 1 minute until they are evenly mixed, then add the pre-wet water (12%) of water absorption rate for one hour, and roll and stir for 3 minutes to obtain component C;

[0041](4) Add ordinary portland cement, polycarboxylate superplasticizer and remaining natural seawater into component C, and continue stirring for 10 minutes to obtain concrete building materials.

[0042] In the coral sand 238 U activity is 16.8Bq / kg, 226 Ra...

Embodiment 2

[0044] A low-radioactivity concrete for construction, prepared from cast iron slag, composite Portland cement, natural seawater, polycarboxylate superplasticizer, and coral skeleton at a mass ratio of 0.8:1.5:0.5:0.05:0.48, prepared The method includes the following steps:

[0045] (1) The coral skeleton is crushed into particles with a particle diameter of 1.2 mm to obtain component A;

[0046] (2) the casting pig iron slag is crushed into particles with a particle diameter of 12 mm to obtain component B;

[0047] (3) Put component A and component B in a concrete mixer and dry mix them for 1.8 minutes until they are evenly mixed, then add the pre-wet water (14%) with water absorption rate for one hour, and roll and stir for 3.4 minutes to obtain component C;

[0048] (4) Add composite Portland cement, polycarboxylate superplasticizer and remaining natural seawater into component C, and continue stirring for 12 minutes to obtain concrete building materials.

[0049] In the c...

Embodiment 3

[0051] A low-radioactive concrete for construction, which is composed of coal ash, steelmaking pig iron slag, sulfate-resistant cement, artificial seawater, polycarboxylate water reducer, coral sand, and coral bone according to the ratio of 0.25:0.28:1.2:0.33:0.03: The mass ratio of 0.1:0.12 is prepared, and the preparation method comprises the following steps:

[0052] (1) crushing coral sand and coral skeleton into particles with a particle diameter of 1.5mm to obtain component A;

[0053] (2) pulverizing coal ash and steelmaking pig iron slag into particles with a particle diameter of 14mm to obtain component B;

[0054] (3) Put component A and component B in a concrete mixer and dry mix them for 2.5 minutes until they are evenly mixed, then add the pre-wetted water (16%) of water absorption rate for one hour, and roll and stir for 3.8 minutes to obtain component C;

[0055] (4) Add sulfate-resistant cement, polycarboxylate superplasticizer and remaining artificial seawate...

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Abstract

The invention discloses an application of coral sand and / or coral bone in preparation of a low-radioactivity building material. The coral sand and / or coral skeleton is added into a building material raw material as a diluent to prepare the concrete building material. A certain proportion of low-radioactivity-level coral sand and / or coral bone are / is added as diluents according to the radioactivitylevels of coal ash residues and mineral slag, so that the requirement of a standard limit value is met, and compared with the prior art, remarkable progress is achieved. Coral reefs, sand and seawater of offshore island reefs are fully utilized, and local materials are used, so that scarce terrestrial common sandstone and fresh water are partially replaced; the purposes of overcoming the defectsof building raw materials, reducing the marine transportation cost and shortening the construction period can be achieved; and national offshore island engineering construction can be enhanced, and national ocean strategic requirements are met.

Description

technical field [0001] The invention relates to the use of coral sand and / or coral skeleton in preparing low-radioactive building materials. Background technique [0002] Coal ash is the most important solid waste in coal-fired power plants. my country produces hundreds of millions of tons of coal ash every year. my country and other countries in the world all use coal ash as building materials (mainly concrete) to realize the recycling of solid waste. However, the high radioactivity levels of coal ash often also introduce a high risk of ionizing radiation, limiting its use. [0003] Slag is the residue after beneficiation or smelting of ore. In industrial production, slag plays an important role, especially in some large factories. Using slag to make refining and processing into slag cement, slag powder, slag powder, slag Portland cement, slag cotton, blast furnace slag, granulated blast furnace slag powder, copper slag, and slag vertical mill. Energy consumption is save...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/00C04B14/28C04B18/10
CPCC04B28/04C04B28/00C04B14/28C04B2111/00025C04B18/10C04B22/0026C04B2103/302C04B18/141Y02W30/91
Inventor 林武辉余克服王英辉
Owner GUANGXI UNIV
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