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Here's some additional information from one of our experts:

Here's some additional information from one of our experts:

experts: Here 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

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