Preparation method of ground source heat pump drilling backfilling material
A ground source heat pump and raw material technology, applied in the field of ground source heat pump, can solve the problem of high cost, and achieve the effects of reducing emissions, reducing costs, and easily obtaining raw materials
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Embodiment 1
[0061] Raw materials: Portland cement, fly ash, steel slag fine powder, defoamer, expansion agent, bentonite, water reducing agent, steel slag fine aggregate, water.
[0062] The mass ratios of the above components are: 1, 0.2, 0.2, 0.01, 0.08, 0.05, 0.004, 1.5, 0.43.
[0063] Cement: Ordinary Portland cement, strength grade 52.5.
[0064] Fly ash: Class I fly ash
[0065] Steel slag powder: 0.08mm sieve percentage content 0.6%, specific surface area 450kg / m 3
[0066] Defoamer: silicone defoamer, non-toxic, tasteless, viscosity 1500Pa.s.
[0067] Expansion agent: UEA expansion agent, limit expansion rate to 0.04% for 7 days in water.
[0068] Bentonite: Sodium-based bentonite with a swelling capacity of 40ml / g.
[0069] Water reducing agent: polycarboxylate water reducing agent, water reducing rate is 25%.
[0070] Aggregate: particle size ≤ 1.18mm, see Table 2 for aggregate gradation.
[0071] Table 2
[0072] Mesh size / mm Cumulative sieve residue / % 1....
Embodiment 2
[0084] Raw materials: Portland cement, fly ash, steel slag fine powder, defoamer, expansion agent, bentonite, water reducing agent, steel slag fine aggregate, water.
[0085] The mass ratios of the above components are: 1:0.3, 0.3, 0.005, 0.08, 0.08, 0.008, 1.5, 0.55.
[0086] Cement: Ordinary Portland cement, strength grade 42.5.
[0087] Fly ash: Class II fly ash
[0088] Steel slag powder: 0.08mm sieve percentage content 1.0%, specific surface area 390kg / m 3
[0089] Defoamer: silicone defoamer, non-toxic, tasteless, viscosity 1000Pa.s.
[0090] Expansion agent: UEA expansion agent, limit expansion rate to 0.03% for 7 days in water.
[0091] Bentonite: Calcium-based bentonite with an expansion capacity of 20ml / g.
[0092] Water reducing agent: Nai series water reducing agent, the water reducing rate is 20%.
[0093] Steel slag fine aggregate: particle size ≤ 1.18mm, see Table 3 for aggregate grading requirements.
[0094] table 3
[0095] Mesh size / mm Cum...
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