Mixers
2 Bag Diesel Mixer
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Product Description
A basic mixture of mortar can be made using the volume proportions of 1 water : 2 cement : 3 sand. Most of the student activities can be conducted using this basic mixture. Another "old rule of thumb" for mixing concrete is 1 cement : 2 sand : 3 gravel by volume.
https://www.youtube.com/watch?v=T_gepV_KDnk&feature=youtu.be