Landscape & Urban Design Issue 40 2019 | Page 48

CONCRETE & STONEWORK CREATING BEAUTIFUL GARDEN ORNAMENTS Cast stone has been a prime building material for hundreds of years. There are many different varieties of cast stone but the main two are semi dry cast and wet cast. In both cases moulds are used to create the relevant shape of each component. These are mainly architectural components but in the case of established companies like Chilstone a semi- dry mix has been used for the last 66 years to create beautiful garden ornaments such as fountains, urns, benches. Semi-Dry Cast The first manufacturing method involves compacting a semi-dry cast stone mix into wooden or fibre glass moulds. Chilstone use specially selected arrogates that they blend on site along with other materials to produce a mix that once moulded, closely resembles natural stone but at a fraction of the price of natural stone. As the name suggests there is a small amount of moisture in the mix and once a garden ornament or architectural stone has been cast, water must be added daily to enable the stone to fully cure over 8-10 days. If this does not happen the stone will be sent out green and under strength. Structural products can be made providing reinforcement (rebar) is used when structural items are being made. The ability to reinforce semi-dry cast stone is yet another 48 www.landud.co.uk advantage over natural stone. In addition, channels, sockets, bars, and lifting sockets can be cast into the stone. These can be made to the engineer’s specification for components such as cills, columns, coping, portico’s and entablatures, these can be made in a variety of colours from Portland, bath stone, York stone or ragstone (see images) Follow us @ludmagazine