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Four common grade of concrete

2013-09-12 10:07:58


Currently on the market relatively concrete building four common label concrete were: C15, C20, C25, C30, many customers want a deeper understanding of these four common label under concrete, following a brief introduction of these four common label of the concrete:

C15: cement strength: 32.5 Mpa; The pebble concrete cement surplus coefficient of 1.00; The aggregate particle size of the largest 20 mm; Slump 35 ~ 50 mm; With SAP: water per cubic meter, 180; Cement: 310; Sand: 645; Stone: 1225. Mixture ratio is: 0.58:1:2. 081:0.58, sand ratio 34.5%, water cement ratio: 0.58.

C20: cement strength: 32.5 Mpa; The pebble concrete cement surplus coefficient of 1.00; The aggregate particle size of the largest 20 mm; Slump 35 ~ 50 mm; With SAP: water per cubic meter, 190; Cement: 404; Sand: 542; Stone: 1264. Mixture ratio is: 0.47:1. 342:0.47, sand ratio 30%, water cement ratio: 0.47.

C25: cement strength: 32.5 Mpa; The pebble concrete cement surplus coefficient of 1.00; The aggregate particle size of the largest 20 mm; Slump 35 ~ 50 mm; With SAP: water per cubic meter, 190; Cement: 463; Sand: 489; Stone: 1258; Mixture ratio is: 0.41:1. 056:0.41, sand ratio 28%, water cement ratio: 0.41.

C30: cement strength: 32.5 Mpa; The pebble concrete cement surplus coefficient of 1.00; Coarse aggregate size 20 mm, biggest slump 35 ~ 50 mm; With SAP: water per cubic meter, 190; Cement: 500; Sand: 479; Stone: 1231; Mixture ratio is: 0.38:1-0. 958:0.38, sand ratio 28%, water cement ratio: 0.38.