Recently there has been substantial interest in using ground limestone in cement at levels of up to 15% to improve the sustainability of cement manufacturing. Frequently, these portland limestone cements (PLC) are ground finer to provide comparable performance with ordinary portland cements (OPC). The resulting particle packing from the fine grinding leaves smaller pores. There is a question as to whether the finer nature of these materials results in them having a higher shrinkage and higher potential for cracking. This presentation reports results of a study that assessed the shrinkage and cracking performance of three mortar systems: 1) an OPC, 2) a PLC containing interground limestone, and 3) a PLC-slag blend (interground limestone and blast furnace slag) at a water to powder ratio of 0.39.
National Ready Mixed Concrete Association. NRMCA Reserve all rights all the content of this site.
Please contact Web Master at NRMCA at firstname.lastname@example.org with any questions.
All content in this Download Center is the property of National Ready Mixed Concrete Association. Any illegal linking, altering and abusing the associated file(s) without permission is not tolerated. And the person or entity held responsible will be prosecuted to the full extend of the law as it permits.