As a construction technique, spraying concrete or ‘shotcrete’ as it is now called goes back over a century, to a Chicago taxidermist who needed to devise an innovative technique for repairing the dilapidating façade of the Field Columbian Museum in Chicago. Carl Akely patented his process and the equipment it required. Akely’s process involved spraying from a dry mixed hopper of concr... https://vicdemolition.com.au/shotcreting-melbourne.php