Revision history [back]
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1 |
initial version
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Here's some additional information from one of our experts:
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2 |
No.2 Revision
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Here's some additional information from one of our
experts:
I concur with others the 1:2:4 ratio is more normal.
Additionally the volumes of component materials are NOT additive, as the cement and sand / fine aggregate fill voids between the course aggregate (typically a multiplier is used to get the estimated mixed volume).
You could reduce the following water contents by max 20% if you have really good quality mechanical vibration (brings W/C down to about 0.45) but this may not be suitable for small quantities site hand mixed, and manual compaction.
The nearest mix I know to Lloyd’s 1:2:3 mix would be a 1:1.5: 3 mix with W/C = 0.52, which is a
fairly dense impermeable concrete for tanks etc at about 200 kg/cm2. A 1:1.5: 3 mix:
Typically
1bag cem
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3 |
No.3 Revision
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Here's some additional information from one of our
experts:
experts, Chris Nixon:
Here
are
some figures from a simple mix batch calculator I developed a few years ago for site calcs.
I concur with others the 1:2:4 ratio is more normal.
Additionally the volumes of component materials are NOT additive, as the cement and sand / fine aggregate fill voids between the course aggregate (typically a multiplier is used to get the estimated mixed volume).
You could reduce the following water contents by max 20% if you have really good quality mechanical vibration (brings W/C down to about 0.45) but this may not be suitable for small quantities site hand mixed, and manual compaction.
The nearest mix I know to Lloyd’s 1:2:3 mix would be a 1:1.5: 3 mix with W/C = 0.52, which is a
fairly dense impermeable concrete for tanks etc at about 200 kg/cm2. A 1:1.5: 3 mix:
Typically
1bag cem
