A preferred manner of fracturing the composite block is to direct a sharp tool 16 somewhat wider than the usual chisel at right .angles to the side face of the block and against the granite layer thereof, inserting its edge in the groove, if such is provided,<a href="http://www.goodcrusher.com/industry/kaolin-mining-and-crushing-equipment.html">Kaolin Mining And Crushing Equipment</a> and striking its handle 17 a sharp blow when the block will be broken readily and on a plane quite level and smooth. In the view shown in Fig. 3, the block while being broken is supported on a block 18, but this particular form of support is not essential.
The result of this fracture is a block shown in Fig. 1 as a block of two materials, the rear portion 10 being of concrete'only and the face 19 designed to form the surface .of the finished wall having a granite face with split pebbles 12 appearing over its-surface and affording.<a href="http://www.goodcrusher.com/industry/kaolin-mining-equipment-for-sale.html">Kaolin Mining Equipment For Sale</a> a rock face that reflects the light rays atVarying angles and thus presenting a sparkling and jewelled appearance which is highlyprnamental. The groove 15 having been dividedby the block fracture, the final block will have a beveled edge as designated by'20.
By making the strips 14 of other shapes including ornamental curves, the edges 20- may be changed to corresponding curved edges as 21 and.23 in Figs. 5 and 6. These views also show some of the man designs possible by laying finished blocks a ove each other with two such curved edges together,giving the ornamental effect shown at 22 and 24.Summarizing some of the conditions in related layers and parts of the block to be manufactured, it may be again stated that the pebble facing material 11.must be rich enough in cement so that when properly compacted into blocks and set, the voids between the pebble bodies which are filled with cement will be stronger andv tougher than the pebbles themselves, so that in the method of manufacturing, the plane of fracture, by following the line of least resistance, will go right through the pebbles and not around them, and'thus show up the beautiful clean fra'cturesdhrough the pebbles.