Frequently Asked Questions
We have questions and answers to help you decode the terminology and the fundamentals of mouldmaking and casting.
- What is plasticizer? Plasticiser is effectively chemical water. It goes by multiple names: plasticiser, water-reducer, super-plasticiser, high-range water-reducer, etc. In GFRC, it allows for adequate working properties of the slurry at a low water/cement ratio.
- What are the benefits of GFRC? Highly durable and safe Design freedom since GFRC is able to be moulded into almost any shape and colour Requires very low maintenance Installation is quick and cost effective Weather and fire resistant Economical Energy efficient
- Is the type of sand used in GFRC important? Yes. The typical specification is 30-mesh silica: washed, dried and graded. We can look at each requirement for further explanation: Washed: this ensures that impurities that may cause problems are removed. Dried: wet sand can contain as much as 5 % moisture, making it very difficult to ...
- How Can I Eliminate Surface Voids in Concrete? Surface voids (small holes, also known as bug holes or pitting) found on the surface of concrete castings have affected anyone who has ever cast concrete. Castings with a significant number of voids must be post finished or discarded, resulting in wasted product, time and labour. Understanding ...
- What is GFRC? GFRC stands for Glass fibre Reinforced Concrete. It is a composite comprised of Portland cement, fine aggregate, water, acrylic co-polymer, alkali resistant glass fibre reinforcement and additives. In many international markets, it is referred to as GRC – Glassfibre Reinforced Concrete. The ...