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+--- Thread: Tell me your cinder/ferrocement mix stories! (/showthread.php?tid=13172)
Tell me your cinder/ferrocement mix stories! - Ethan5150 - 02-17-2014
Howdy folks, I'm new to Puna and looking to build here using some very unconventional methods. I've already seen a local earthbag home(cinder/sand/cement-in bags) as well as an earthship and I'm looking to improve upon the designs. I'm wondering if anyone out there has experience utilizing cinder in their concrete mixes? What ratios/materials are you using? Has anyone utilized ferrocement here? How about with cinder? Fiberglass? Anyone know what kind of compressive strength to expect from concrete made with cinder? Tell me your stories, I want to know what works...and what doesn't! I look forward to hearing your responses!
RE: Tell me your cinder/ferrocement mix stories! - Seeb - 02-17-2014
Cinder has a very low compressive strength. Your better off going with regular ferocement.
RE: Tell me your cinder/ferrocement mix stories! - Haaheo okole puka - 02-17-2014
Cinder/scoria has some useful qualities within concrete mixes and its compressive strength within concrete/ferro is in direct relationship to its portion and granular size within the mix. The smaller the granule size, the greater its compressibility within the mix. Basic cinders are extremely porous reducing their compressive value until ground fine wherein they adopt positive structural characteristic within a mix.
I am using a custom recipe for concrete cladding panels for my house that incorporate cement, ground cinders/scoria, perlite, fly ash and zinc oxide. Each play an important role within the mix.
Here's some further reading on the topic and the superior composition of Roman Concrete cited last.
www.gujs.gazi.edu.tr/index.php/GUJS/article/download/923/647
http://newscenter.lbl.gov/news-releases/2013/06/04/roman-concrete/
RE: Tell me your cinder/ferrocement mix stories! - john the architect - 03-15-2014
Interesting discussion. A friend of mine was working to set up a cinder concrete building system here, but lost patience and went to Mexico and is building there with that method.
Nice thick walls, like working with adobe or rammed earth. Need to set up a screw-type conveyor for material placement, concrete pumpers cannot have cinder in their delicate machines.
H.o.p. sounds like he (or she) is onto some interesting building methods. I particularly am intrigued by the Roman concrete idea. Part volcanic material, part sea water? 'Local' concrete with a working recipe like that could replace imported cement.
John Maloney
310.562.0362
johnmaloney3@me.com
Hawaii Architect AR8082
www.jmagreenbuilding.com