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
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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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