The Hand-Sculpted House: A Practical and Philosophical Guide to Building a Cob Cottage: The Real Goods Solar Living Book by Ianto Evans & Michael G. Smith & Linda Smiley

Author:Ianto Evans & Michael G. Smith & Linda Smiley [Evans, Ianto]
Language: eng
Format: epub
Publisher: Chelsea Green Publishing - A
Published: 2002-06-01T00:00:00+00:00

The Crunch Test

The goal with Oregon cob is to build a wall of sand grains mortared together with clay. Sand grains should be touching one another, so that the mix can’t shrink much as it dries. One very simple way to determine this is what we call the crunch test. Take a small handful of each mixture. Hold it up to your ear. Squeeze and listen. If the mix has enough sand, you will hear the sharp grating sound of sand grains rubbing against each other—Crunch! CRUNCH!—like scraping sandpaper. There is usually a marked difference in sound between mixes with enough sand and those without. Try many different samples; get used to the sound of a good building mix.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.