Bruce King is a registered structural engineer in private practice in San Rafael, California. He is the author of Buildings of Earth and Straw: Structural Design for Straw Bale and Rammed Earth Architecture (1996) and Design of Straw Bale Buildings; The State of the Art (2006). He is founder and director of the nonprofit Ecological Building Network and co-founder, with his wife Sarah Weller King, of Green Building Press. He lives in San Rafael, California.
You may have heard of fly ash as an eco-friendly alternative to using portland cement in concrete, but until now there has been no easy guide to how it makes superior concrete, or to how to use it.