For Micro Concrete Roofing (MCR) Roman II, Super Roman, Semi Sheet roofing, Hollow Formwork Units (waffles), Floor Tiles, Wall Tiles, Paviors, Balustrades and Copings:

• Cement – Ordinary Portland Cement is suitable.  Slow setting pozzolanic cements (sometimes known as ‘Masonry Cement’) should be avoided.
• Sand – Sand should not contain more than 10% clay or silt as this may cause strength and porosity problems.
• Gravel – Stones should range in size from 2mm-4mm for 6mm thick tiles and 2mm-5mm for 8mm or 10mm thick tiles.  Better results will obtained from crushed or angular particles.
  

For Fibre Concrete Roofing (FCR) Roman II, Super Roman and Semi Sheet roofing and Storage Unit arches:

• Fibre – many different fibres can be used, the most common being sisal, jute, henequen, flax, hemp, manila or coconut coir.  Artificial fibres such as polypropylene and glass can also be used.

For Water Tanks, Storage Units and Blocks:

• Cement – Ordinary Portland Cement is suitable.  Slow setting pozzolanic cements (sometimes known as ‘Masonry Cement’) should be avoided.
• Sand – Ordinary ‘builders’ sand will be suitable for the production of good quality concrete blocks.
• Gravel – Stones should be smaller than 10mm in size.  Better results will be obtained from crushed or angular particles.

For Building Blocks:

• Cement – Ordinary Portland Cement is suitable.  Slow setting pozzolanic cements (sometimes known as ‘Masonry Cement’) should be avoided.
• Sand – Ordinary ‘builders’ sand will be suitable for the production of good quality concrete blocks.
• Gravel – Stones should be smaller than 10mm in size.  Better results will be obtained from crushed or angular particles.
• Sandcrete – (ie – sand & cement only) can be used but cement content will need to be higher.

Suggested Mixes for Micro-Concrete (MC) and Fibre Concrete (FC) products: