Youker's mix > GreenBuildingTalk - Green Building Forums on Insulating Concrete Forms (ICF), Structural Insulated Panels (SIP), Radiant Heating, Geothermal Heat Pumps, Solar Power

Forums

Members

You are not authorized to post a reply.

Author

Messages

Unregistered User is Offline

Registered Users

Posts:2321

02/23/2004 8:58 AM
I am thinking about installing radiant heat and am hoping to avoid the cost of gypcrete. I read the article referring to Yonker's mix. The article mentioned the recipe in figure 3, but there was no figure 2 on the linked page. Does anyone actually have the recipe? Is it possible to mix by hand or does it have to come from a readymix plant?

Unregistered User is Offline

Registered Users

Posts:2321

02/25/2004 5:13 PM
The article is from Journal of Light Construction, July 1995. Author of article was J Siegenthaler. The mix recipe was: Type 1 Portland cement 517 lb. Concrete sand 1,630 lb. #1A (1/4" maximum) peastone 1,485 lb. Air-entrainment agent 4.14 oz. Hycol (water-reducing agent) 15.5 oz. Fiber mesh 1.5 lb. Superplasticizer (WRDA-19) 51.7 oz. Water about 20 gal. Footnote text from figure: Note: These mix proportions make one cubic yard of 3,000-psi concrete floor topping (strength rated at 28 days). The high-slump concrete recipe creates an easy-to-pour mix that flows well around the tubing, providing excellent thermal conduction between the tubing and the concrete. When I asked the local redimix plant guys about a lightweight mix, they wanted to add a 'foaming' agent. Seemed to me that you'd want to steer clear of anything that introduced air or foam into the mix - if conduction is what you're after.

jasahl

Registered Users

Posts:3

01/27/2006 11:14 PM
I know this is old, but does anyone know how Youker's mix compares to regular concrete in terms of weight? Based on the ingredients listed, & it seems it would end up being ~ 140 pcf meaning that a 2" slab would weight ~23 psf - is it normal to use something that heavy as a suspended slab?

Unregistered User is Offline

Registered Users

Posts:2321

01/30/2006 9:45 AM
Wow : I would be scared to use anything at even 20 psf without a through analysis of internal loads & wall loading based on a solid approved design. I doubt your building inspector would be satisfied with anything less

You are not authorized to post a reply.