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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[0060] Example 1
[0061] Raw materials: general Portland cement, fly ash, steel slag micropowder, 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 class 52.5.
[0064] Fly ash: Class I fly ash
[0065] Steel slag powder: 0.08mm sieve residue percentage 0.6%, specific surface area 450kg / m 3
[0066] Defoamer: Silicone defoamer, non-toxic, tasteless, viscosity 1500Pa.s.
[0067] Expansion agent: UEA expansion agent, 7d limit expansion rate in water is 0.04%.
[0068] Bentonite: sodium-based bentonite, the swelling capacity is 40ml / g.
[0069] Water reducing agent: polycarboxylate water reducing agent, the water reducing rate is 25%.
[0070] Aggregate: The particle size is ≤1.18mm, and the aggregate gradation is shown in Table 2.
[0071] Table 2
[0072] Sieve si...
Example Embodiment
[0083] Example 2:
[0084] Raw materials: general Portland cement, fly ash, steel slag micropowder, 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 class 42.5.
[0087] Fly ash: Class II fly ash
[0088] Steel slag powder: 0.08mm sieve residue percentage 1.0%, specific surface area 390kg / m 3
[0089] Defoamer: Silicone defoamer, non-toxic, tasteless, viscosity 1000Pa.s.
[0090] Swelling agent: UEA swelling agent, 7d limit swelling rate in water is 0.03%.
[0091] Bentonite: Calcium-based bentonite, the expansion capacity is 20ml / g.
[0092] Water reducing agent: Nai series water reducing agent, the water reducing rate is 20%.
[0093] Steel slag fine aggregate: particle size is less than or equal to 1.18mm, and the aggregate gradation is shown in Table 3.
[0094] table ...
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