What are the basic requirements of cement concrete mix design?

The proportion of concrete is 1, and the proportion of cement sand for paving is 1: 2: 3 sand 1.6 tons /m3 cement 3. 1 ton /m3 sand 2.7 tons /m3. 2. Wall-building: One cubic meter of sand uses 7 packages of cement, labeled "325", to ensure that you have nothing. 3. What is the proportion of cement, sand and stone in the mixed soil? Generally1; 2.5; 3.2 C20 water: 175kg cement: 398kg sand: 62 1kg stone: 126 1kg mix ratio: 0.51:1. The mixing ratio of 026 1kg is 0.44:1.42: 3.17c30 water: 175kg cement: 46 1kg sand: 5 12kg stone: 60. +0:2.724. Proportion of plastering cement to sand: 325, 425 and 625 cement. If it is a general household, 325 is used more, which can be used to stack walls, plaster walls and plaster floors. Plastering ratio is 2: 1(2 parts sand 1 part cement). If you want to draw the ground with special light, you should use 425. The ratio of stacked wall and plastered wall is 3: 1(3 parts of sand, 1 part of cement). 5. Masonry wall cement sand ratio 100 mortar cement sand ratio 1: 4 75 mortar cement sand ratio 1: 3 See what wall you build. The average brick wall is 1: 5. If you want to be stronger, you can use that 1: 3 one. The volume of each brick (24011553) = 0.00146 cubic meters (that is, its actual consumption and volume), The actual net mortar consumption of a brick wall package is1(0.1150.01) (0. 0530.01)10 The actual mortar consumption is/kloc-0. 56 0.00 146 = 0.2278 m3 (plus loss 1.0 1=0.23 m3. 2: You said 1: 2. According to cement PB32.5 and cement PB42.5, the quota number is divided into six grades. m 2.5 _ M5 _ m 7.5 _ m 10 _ m 15 _ 2m 20。 I assume that you press the cement PB32.5 and the strength is M 10, so the cement dosage is 64.35 kg. Medium sand is 0.29 m3, 1400 kg /m3=406 kg (this is the weight ratio), and there is a volume ratio, which is simple here. Finally, cement mortar, cement pb32.5, cement M 10, cement 64.4 kg and medium sand 406 kg were used. This is theoretical data. About 1.3 cubic meters of sand can be screened out.