Hey forum, I've been looking for concrete recipes but they vary depending on where you look. Some describe it in kg, others in L. Who weighs sand and gravel? A good recipe in liters would be great!
I'm going to mix with a tombola and would like the concrete to be of "good" quality. The retaining wall will act as support for an upcoming pool, and the space inside the retaining wall will be filled with crushed stone and then a concrete base on top of that.
I will use Finja's 250x400 blocks and install reinforcement according to the instructions.
I'm going to mix with a tombola and would like the concrete to be of "good" quality. The retaining wall will act as support for an upcoming pool, and the space inside the retaining wall will be filled with crushed stone and then a concrete base on top of that.
I will use Finja's 250x400 blocks and install reinforcement according to the instructions.
1 part cement. 3 parts fine sand is strong enough for masonry. What you measure it with doesn't matter. The base is the same, but with concrete gravel that is a bit coarser and can also advantageously have 1 part crushed stone in it. Fills more then. Through the base before it has set, you drive down reinforcement bars 12 or 16 about 40 - 50 cm into the ground and let them protrude as much as a stone is high. A suitable distance between is about 60 cm, or as it fits with the stone. In the first layer, 25 mm holes are drilled and the stone is threaded over, the hole is filled with slurry (thin concrete) then the wall will stand firm and not bow outward.
I got a recipe from the concrete supplier we used when pouring our foundation. I have mixed a total of 3 cubic meters with the same recipe now. It corresponds to C25/30 with a w/c ratio of 0.66.
The recipe was in kg but I simply measured the amount in 10-liter buckets which gives this:
4 buckets of concrete gravel
2.5 buckets of 8/16 macadam
20 kg of cement
9.2 liters of water
0.12 liters of plasticizer
This yields about 66 liters of mixed concrete. I have a large forced mixer, so I've used 4 bags of cement at a time. I haven't measured the water but added it gradually.
The recipe was in kg but I simply measured the amount in 10-liter buckets which gives this:
4 buckets of concrete gravel
2.5 buckets of 8/16 macadam
20 kg of cement
9.2 liters of water
0.12 liters of plasticizer
This yields about 66 liters of mixed concrete. I have a large forced mixer, so I've used 4 bags of cement at a time. I haven't measured the water but added it gradually.