|CHPS||MW3.1: 2 pts.|
|BDCv3||MRc4 up to 2 pts.
(Healthcare MRc3: up to 4 pts.)
|NDv3||GIBc15: 1 pt.|
|BDCv4||MR BPDO - Sourcing: up to 2 pts.|
|NDv4||GIB Recycled and reused infrastructure: 1 pt.|
Masonry grout is approximately 50% or more of the volume of solid grouted concrete masonry, and has substantially greater potential sustainability benefit than recycled content in CMU alone. Fly ash, or fly ash combined with ground granulated blast furnace slag (GGBFS), may be used as a partial Portland cement replacement, and as a practical means of introducing significant recycled content into the masonry wall without adversely affecting aesthetic control of exposed masonry units.
The Concrete Masonry Association of California and Nevada recently conducted studies to demonstrate the effects of fly ash in masonry grout. Tests were conducted on mix designs with fly ash and fly ash/GGBFS as replacement of cement. Results indicated:
Availability and specific mix designs will vary by local grout suppliers, who should be consulted for specifications. Please contact the Concrete Masonry Association of California and Nevada (CMACN), www.cmacn.org, or your Desert Block representative for more information.