Why you need to use a concrete bonding agent. The cement within a concrete mix doesn’t contain any natural bonding agents – so when fresh concrete is added on top of an existing layer of concrete, the two won’t join together. Once cured, the new concrete will simply sit on top as a separate layer.

Making your own concrete stepping stones is a fun summertime activity that adds a personal touch to your garden. Once you've selected concrete and have an idea of what you want your cement stepping stones to look like, you might think it's smooth sailing from there, but concrete can be tricky to work with. Here are some tips on how to use concrete for stepping stones.

Blue Circle High strength Ready mixed Concrete 20kg Bag. Blue Circle High strength Ready mixed Concrete 20kg Bag.Blue Circle Multi Purpose Concrete is a superior ready to use concrete in a unique waste saving waterproof pack. The concrete simply mixes with clean water and sets in 30 minutes. £7.48 More Information

To calculate the concrete volume needed for this type of slab, you need to know the circle's diameter and the depth of this slab.. Formulas used: Area> A = π * D² ÷ 4 where A is the area in square feet, π = 3.14159265358979, D = diameter of circle Perimeter P = π * D where P is the perimeter in feet, π = 3.14159265358979, D = diameter of

215. 4 to 1 mix is far too strong. a 6 or 8 to 1 with an added 1 part lime is perfect for stone. in your case i would go for 6 sand, 1 cement, 1 lime. make your mix stiffer than brickwork mortar and keep your joints as small as possible, fill all joints as you go. at the end of the day scratch off the joints flush and brush with a soft brush.

Professional quality blue steel concrete trowel is precision balanced and ready-to-use. High quality blue spring steel has the perfect amount of "give" which allows for a more flexible blade when finishing. Each blade is cross ground to just the right dimension for that perfect feel. The square blade finishes all the w

Blue Circle Postcrete. A ready to use blend of selected sand, cement and additives formulated for fixing wooden, concrete and metal posts. With just the addition of water and with no mixing required; Postcrete sets in 10 minutes and comes in handy 20kg weatherproof, tear resistant plastic bags. Find your local stockist read more

50-lb Fast Setting Concrete Mix. Model #354502999. Find My Store. for pricing and availability. 148. QUIKRETE. ProFinish 5000 80-lb High Strength Concrete Mix. Model #100785. Find My Store.

Aug 27,  · For the first calculation example, let’s assume 40 kg of ready-mixed concrete that you want to use for mixing concrete. Once you have finished your mould for pouring the concrete, measured everything accurately and calculated the volume, you assume a rough figure of 21 litres of concrete after mixing 40 kg of concrete mixture.

Examples of areas where. Blue Circle® High Early Strength Cement may be used are concrete product applications (roof tiles and masonry blocks), precast and tiltup concrete and where early stripping of formwork is desired

Blue Circle® Rapid Set No-Mix Concrete is a dry blend of specially graded aggregate, sand, and cement, which is mixed with a special additive to create a fast setting concrete mix. It is ideal for any application where a lower than normal strength concrete is acceptable. Uses include concreting in letterboxes, clothes lines, post holes etc.