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The Kerbmaker is designed to accept normal locally available materials in concrete mixes designed for kerbing work. Whilst largest aggregate may be used with Kerbmaker a maximum aggregate size of 13mm ( 1/2) is preferred. If this is not available a mixture of 20mm - 10mm (3/4" - 3/8") is acceptable.

An engineer should design the mix, but a general design found to work well in the many areas into which Kerbmaker has been sold is as follows:


Section A:

In proportions

40% Sand of fineness modulus 2.00              768kg
10% 10mm (3/8) aggregate                             192kg
50% 13mm (1/2") aggregate                             960kg
100%                                       =                           1920kg



Section B:

300kg Cement = 6 pack X 50 kg (15.625% of 1920 kg)

Cement is as required for strength but for 20 grade a Concrete approx 300kg/cu meter or 500 lbs/cu yd.



Section C:

Water 130 liters/cu meter or 135 kg water / cu meter

Total Water (including moisture in aggregates and sand) 130 liters/cu meter (20-23 glas/cu yd)

Water : cement ratio approx 0.45



Total aggregates : 1920kg /cu meter
Add Cement required : 300kg /cu meter
Add Water : 130 liters

Total aggregates : 320kg /cu meter (of 3/8 aggregate and 144 kg of sand) Add Cement required : 50 kg/cu meter (One pack)
Add Water : 22.5 liters