Hi,
I am laying a large area of concrete on sandy soil. It will not be required to hold the weight of a car, but I do want it to last. I've read lots of information on laying concrete (including info on this site), but I remain confused about the quantities of materials I need.
I went on one website which attempted to clarify the issue. It specified how many bags of cement, how much 'coarse aggregate', how much 'sharp sand', and how much 'ballast' was needed for a cubic metre of concrete. Thing is, if you read the definition of 'ballast', it says it is a mixture of aggregate and sand. So do I need them all, or is ballast an alternative to separate sand and aggregate? Adding up all the materials they listed would have had to reduce in volume by about a factor of four for me to end up with one cubic metre of mixed concrete. Surely that can't be right?
I have erected a wooden frame, and I have roughly 75mm of compacted hardcore already laid. This leaves roughly 100mm still to fill. I have calculated the volume of this at about 4 cubic metres. What do I need to fill this? I'd be extremely grateful if someone could give me a straight, easy-to-understand answer.
Kind wishes ~ Patrick
I am laying a large area of concrete on sandy soil. It will not be required to hold the weight of a car, but I do want it to last. I've read lots of information on laying concrete (including info on this site), but I remain confused about the quantities of materials I need.
I went on one website which attempted to clarify the issue. It specified how many bags of cement, how much 'coarse aggregate', how much 'sharp sand', and how much 'ballast' was needed for a cubic metre of concrete. Thing is, if you read the definition of 'ballast', it says it is a mixture of aggregate and sand. So do I need them all, or is ballast an alternative to separate sand and aggregate? Adding up all the materials they listed would have had to reduce in volume by about a factor of four for me to end up with one cubic metre of mixed concrete. Surely that can't be right?
I have erected a wooden frame, and I have roughly 75mm of compacted hardcore already laid. This leaves roughly 100mm still to fill. I have calculated the volume of this at about 4 cubic metres. What do I need to fill this? I'd be extremely grateful if someone could give me a straight, easy-to-understand answer.
Kind wishes ~ Patrick