So on that basis i'd say you need between 25 and 50 bags depending on depth of sand for 9 square metres. and Paving mix - 1:3½ cement:all-in ballast or 1:1½:2½ cement:sharp sand:gravel.

Local patios and driveways.

Carefully enter values for the length, width & depth in all the red fields. Mix and add enough water to dampen the mixture just enough so it binds together.

That's a ton of concrete - which is conveniently as near as dammit to a tonne. Hugh Jampton, May 26, 2017 #5. Ans. To create the firm foundation, use a concrete mix of 6 parts all in one ballast with 1 part cement.

The cement to aggregate ratio should be increased to produce concrete with higher strength. Help please ! Generally, your water to cement ratio should be between 0.35 and 0.6. Unit 7A Centre 21 Business Park, Bridge Lane, Warrington, Cheshire WA1 4AY. of 50 kg bag of cement, 0.42 m 3 of sand and 0.83 m 3 of stone aggregate. How many 25Kg bags of cement do I need for 1 cubic metre of all-in-ballast when mixing concrete at a ratio of 1:6. homeowner. How much balast/cement do I need ?

The below image shows quantity of cement, fine aggregate , Coarse aggregate for 1m³ of concrete… I hope it's clear..

Let's do it in imperial - it's easier.

Crawley • Member since 24 Jan 2012 • 2 jobs, 100% positive feedback.

This will give you an estimated weight required and will show you how this can be supplied in three different ways. I extended our patio with slabs and used somewhere between 1 and 2 bags of sharp sand per 2ft square slab. A retired builder friend of mine worked out that I would need 2 … Use the top form for Metric and the lower form if you prefer feet & inches. To create the firm foundation, use a concrete mix of 6 parts all in one ballast with 1 part cement So a 3m wide patio will need 5cm or 50mm of fall. Do not add too much water. Discussion in 'Building' started by Badger1oo, 2 Apr 2015.

Anybody know a site for working out how much ballast and cement to order for building a concrete base.

For 30MPa concrete use 1:0.75:1.5. The amount and particle sizes and distribution of concrete ballast added to a cement mix significantly affect the strength and the amount of cement used in the cement mix. Choose a density of 1.76 for concreting ballast, 1.50 for … Position the first slab on the mortar bed and temp it level with a wooden or rubber mallet or a length of timber. High strength concrete would be mixed using 1 part cement to 5 parts ballast – this affords the sort of water-tight concrete used for building slabs or concrete panels. Sharp sand is good enough to bed them in.

Mix to the ratios that have been decided, in this case 1:5 whether it be 1 Shovel of cement & 5 shovels ballast, or you use 1 bucket of cement & 5 buckets of ballast, use of the same measuring device is essential. Method-1: DLBD method to determine material requirement for 1 Cum concrete The DLBD (Dry Loose … The cross strips can be omitted for small square slabs, but large rectangular slabs may need to be double-crossed. Discussion in 'Landscaping and Outdoors' started by Hugh Jampton, May 26, ... 4 jumbo bags of ballast and 23 bags of cement should do you, assuming your 0.25 depth is the depth of concrete and not the trench. If you google concrete mix calculator, you can find some online tools to help you do the sums as well. Be good as well if you could change the mix ratios. Preparing foundation base. If you're buying ballast by the 50kg bag, you need 16 bags of ballast and 4 bags of cement. Delivery. The base size is 5.7 x 3.3 mt, and am looking to having 4 inch of concrete.

In Conclusion Explains what sand to cement ratio you need for your Concrete Project. These Concrete Calculators provide the required quantities of cement and all-in ballast or cement, sharp sand and gravel required to give a defined volume of finished concrete.

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