JAS21 Posted March 25, 2018 Share Posted March 25, 2018 Guys ...I'm struggling even though I have googled I have a base to construct in M15 concrete 1:2:4 Size 130cms by 130cms and 25cms deep .... ignore the fact that it will have rebar in ... I need to know the volume in CuM of the sand and the aggregate as it is sold in 'scoops' and I think one scoop is around 0.7M3 I think 4 bags of cement would be about correct number to buy Thanks Link to comment Share on other sites More sharing options...
BEVUP Posted March 25, 2018 Share Posted March 25, 2018 Well I might be a little rough but this equates to 0.423 m3 So having a guess I would say to get 0.15 m3 sand & 0.3 m3 of aggregate 1 Link to comment Share on other sites More sharing options...
JAS21 Posted March 25, 2018 Author Share Posted March 25, 2018 57 minutes ago, BEVUP said: Well I might be a little rough but this equates to 0.423 m3 So having a guess I would say to get 0.15 m3 sand & 0.3 m3 of aggregate Thanks ... I worked it out I think ... This .423 don't you need to multiply by 1.54 which will make 0.65 ...if that is the case it's 0.28M3 sand and 0.57M3 of aggregate ...so one scoop of each. Link to comment Share on other sites More sharing options...
BEVUP Posted March 25, 2018 Share Posted March 25, 2018 8 minutes ago, JAS21 said: Thanks ... I worked it out I think ... This .423 don't you need to multiply by 1.54 which will make 0.65 ...if that is the case it's 0.28M3 sand and 0.57M3 of aggregate ...so one scoop of each. I'm not sure why you would have to Link to comment Share on other sites More sharing options...
steve187 Posted March 25, 2018 Share Posted March 25, 2018 get a scoop of each 3 bags of cement, buy more if required, make sand bags out of the left over sand, always handy to have. Link to comment Share on other sites More sharing options...
JAS21 Posted March 25, 2018 Author Share Posted March 25, 2018 27 minutes ago, BEVUP said: I'm not sure why you would have to 27 minutes ago, BEVUP said: I'm not sure why you would have to I think it's to do with the little bits getting inbetween the big bits ... From somewhere .. Water = 0.5625 x 28.31685 = 15.92 litre, say, 16 litre. So, One bag cement needs 16 liter of water for 0.45 W/C ratio. The dry volume of concrete is equal to one and half times of wet volume. But it is better to use 1.54 for calculating dry volume. Link to comment Share on other sites More sharing options...
Lamkyong Posted March 26, 2018 Share Posted March 26, 2018 call in ready mix truck 1 Link to comment Share on other sites More sharing options...
cooked Posted March 26, 2018 Share Posted March 26, 2018 (edited) 14 hours ago, JAS21 said: I think it's to do with the little bits getting inbetween the big bits ... From somewhere .. Water = 0.5625 x 28.31685 = 15.92 litre, say, 16 litre. So, One bag cement needs 16 liter of water for 0.45 W/C ratio. The dry volume of concrete is equal to one and half times of wet volume. But it is better to use 1.54 for calculating dry volume. why just be complicated when you can be bloody well impossible? Just halve the quantities shown here and plan what to do with any left over concrete: That's a 65 litre wheelbarrow Edited March 26, 2018 by cooked 1 Link to comment Share on other sites More sharing options...
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