Technological process for producing pipe pile by using fine-ground metallurgical slag and fine-ground high silicon sand multiple infiltration method
A process technology, high silica sand technology, applied in the direction of manufacturing tools, reinforced molding, ceramic molding machines, etc., to achieve the effects of reducing energy consumption, reducing pollution, good economic and social benefits
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[0008] Example 1. Production of AB-type prestressed high-strength concrete pipe piles with an outer diameter of 400 mm and a wall thickness of 90 mm. The specific surface area will be 420m 2 / kg of slag (or steel slag) and a specific surface area of 415m 2 50% of high-grade Portland cement or ordinary Portland cement of grade 42.5 or above is replaced by an equal amount of high silica sand per kg in a ratio of 2:3. The admixture is mixed with cement, sand, crushed stone, concrete superplasticizer, water, etc. in a forced concrete mixer for 120 seconds, then the mixture is fed into the pipe pile steel that has been cleaned and prestressed In the lower half of the mold, close the upper half of the steel mold for the pipe pile and then stretch the prestressed steel bar, place the steel mold on the centrifuge for centrifugation, and then carry out the normal pressure steam curing at 85°C for 7 hours after the centrifugation. ; The demoulding strength of concrete after atmosphe...
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