All FAQs
What is the difference between PLC and OPC?
Is PLC specified as a Type IL or a Type GUL?
Is the handling and placing of PLC concrete different than “regular” concrete?
No, mixes made with PLC are handled in the same way as OPC mixes. Mix designs are tested to demonstrate how PLC affects performance, if at all, and proportions may be adjusted during the testing stage. Ready-mix producers have generally found that concrete proportions do not change when PLC is substituted for OPC at a 1:1 replacement level. Fresh and hardened properties of concrete are similar whether the binder is portland cement or portland-limestone cement.
Should architects change their plans when using PLC?
How long has ground limestone been used in cement?
What does that acronym stand for?
Many industry groups are mentioned on this site, as are abbreviations for some technical terms. Here is a list of acronyms along with what each one stands for:
AASHTO – American Association of State Highway and Transportation Officials
ACI – American Concrete Institute
ACPA – American Concrete Pavement Association
AIA – American Institute of Architects
ASTM International – formerly, American Society for Testing and Materials
CAC – Cement Association of Canada
CSA – Canadian Standards Association
DOT – Department of Transportation, usually associated with each state. For example, Colorado DOT
MIT CSHub – Massachusetts Institute of Technology Concrete Sustainability Hub
NCMA – National Concrete Masonry Association
NRMCA – National Ready Mixed Concrete Association
OPC – ordinary portland cement
PCA – Portland Cement Association
PCI – Precast/Prestressed Concrete Institute
PLC – portland-limestone cement