C30-level steel slag sand self compact concrete and preparing method thereof and prefabricated part
A technology of self-compacting concrete and steel slag sand, which is applied in the preparation field of C30 grade steel slag sand self-compacting concrete and C30 grade steel slag sand self-compacting concrete. , to achieve excellent homogeneity, meet strength requirements, and good compactness
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[0079] The present invention also relates to a preparation method of C30 grade self-compacting concrete, comprising the following steps:
[0080] (1) Sorting, crushing and screening the waste concrete in the construction waste, sieving out the particles smaller than 9.50mm and larger than 20mm, and processing the aggregate particle size in the range of 10mm to 20mm to make recycled coarse aggregate ;
[0081] (2) In order to prevent sticking to the pot, weigh an appropriate amount of each material, mix concrete, wait until the inner wall of the mixer is glued with cement mortar, take out the concrete, and weigh material A, recycled coarse aggregate, natural coarse aggregate, water, powder Coal ash, feed in the order of recycled coarse aggregate, natural coarse aggregate, material A, and fly ash, then start the mixer and dry mix for 1-10 minutes;
[0082] (3) Add the weighed water and additional water, and continue to stir for 1-10 minutes.
[0083] Glossary
[0084] The cem...
Embodiment 1~16
[0096] (1) Prepare raw materials:
[0097] Cement: P O42.5 ordinary Portland cement, apparent density is 3.10g / cm 3 .
[0098] Fly ash: Class I fly ash, apparent density 2.04g / cm 3 .
[0099] Glass beads: purchased from outside, with a density of 0.1-0.25g / cm 3 .
[0100] Sand: medium sand with a fineness modulus of 2.36 and an apparent density of 2.65g / cm 3 , bulk density is 1.45g / cm 3 , The moisture content is 0.4%.
[0101] Natural coarse aggregate: crushed stone with a continuous particle size of 5-20mm, and an apparent density of 2.75g / cm 3 , bulk density is 1.35g / cm 3 , The water absorption rate is 0.45%.
[0102] Regenerated coarse aggregate: After sorting, crushing and screening waste concrete in construction waste, and sieving out particles smaller than 9.50mm and larger than 20mm, the aggregate particle size is processed into recycled coarse aggregate with a particle size of 10mm to 20mm Aggregate, the apparent density is 2.35g / cm 3 , bulk density is 1.23g...
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