Canada: Progressive Planet has developed a supplementary cementitious material named Planet LCD Cement, based on limestone calcined diatomite. The company said the material can replace up to 50% of Portland cement while maintaining compressive strength in mortar cube tests meeting ASTM C618 requirements. Current testing has reportedly demonstrated strong compressive strength replacing Portland cement on a ‘weight for weight’ basis at 20%, 35% and 50% replacement, with all compressive strengths passing ASTM C618.
CEO Steve Harpur said “Planet LCD Cement uses diatomaceous earth, limestone and gypsum, all of which are plentiful materials. We have created a highly-reactive cement without metakaolin. Waste diatomaceous earth powders sell for a fraction of the cost of metakaolin. This opens up opportunities to utilise waste diatomaceous earth powders globally to replace 50% of Portland with Planet LCD Cement.”
A trademark application for the name Planet LCD Cement has been filed in Canada and a provisional patent application for the composition of Planet LCD Cement has been filed in the US.
