Progressive Planet announced the development of a third supplementary cementing material (SCM), which it has named Planet LCD Cement. The company believes it is the first to develop Limestone Calcined Diatomite (LCD).
LCD contains much lower amounts of alumina than Limestone Calcined Clay Cement (LC3) cements, and Progressive Planet has successfully substituted up to 50% of portland cement with Planet LCD Cement, resulting in strong compressive strength in mortar cube tests. Current testing 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.
“Planet LCD Cement uses diatomaceous earth, limestone, and gypsum, all which are plentiful materials,” said CEO Steve Harpur. “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 utilize waste diatomaceous earth powders globally to replace 50% of portland with Planet LCD Cement.”
Planet LCD Cement was invented by Steve Harpur, Dr. Doug Brown, and Michael Carrell, all full-time team members of Progressive Planet. A trademark application for the name Planet LCD Cement has been filed in Canada, and protection will be sought in the United States, claiming priority to the Canadian application. In addition, a provisional patent application for the composition of Planet LCD Cement has been filed in the U.S., which lays the foundation for international filings in additional countries within one year.
