Thanks for the interesting article there.
I cant help but think its worth mentioning that todays AEs are all acidic, some very strongly so, whereas in the 20s they were alkaline. (IIRC cationic versus anionic). What effect this has on the paper I dont know, I suspect there may be considerable long term benefit in picking the least acidic emulsion.
NT
--- In papercreters@yahoogroups.com, Charmaine Taylor <dirtcheapbuilderbooks@...> wrote:
>
> exterior waterproofing for papercrete
> wall<http://groups.yahoo.com/group/papercreters/message/10272;_ylc=X3oDMTJzMWRzOWwzBF9TAzk3MzU5NzE1BGdycElkAzE5NTU5NDk4BGdycHNwSWQDMTcwNTA0MTk5MgRtc2dJZAMxMDI3MgRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxMjkxMTA2NTA5>Posted
> by: "eogreensticks"
> i think water may be wicking throo my papercrete wall where it is exposed to
> easterly rain conditions-
>
>
> Hi Eo-- you can certainly mix latex paint with sand and cement to paint it
> over the papercrete. Inventor Eric Patterson did this on his papercrete
> privacy wall in NM.
>
> Latex paint & cement has been used smeared into old carpet fibers to make a
> waterproof roof. attached is a link of a carpet with cement/latex base,
> with a dark rub-r-slate over the shed roof ( done by Michael Collins..he
> built this entire shed with just 5' long pieces of wood he got free, sort of
> a "pick up sticks" layout of attachment- on the inside it looks like a
> geodesic dome. http://www.dirtcheapbuilder.com/frshfrruwoca.html (a wicker
> basket is used upside down at the roof pinnacle) Cement pigments were
> drizzled down the walls, and a dragpon was sculpted on one of the roof
> rafters.
>
> http://www.dirtcheapbuilder.com/cdkinububorl.html
> http://www.dirtcheapbuilder.com/frestufwitor.html < bunch of free articles
>
> You an also use a RUB-R-SLATE recipe ( on the CD you got from me) with
> taking clay, asphalt emulsion and sand and make a thicker "paint" to coat
> the walls with. be sure they are dried out first, before doing this. for
> the rest of you here is an info sheet below on using Jack Bay's
> Rub-R-Slate
>
> Spaceman took this RRS recipe a few years ago and coated some triangles of
> papercrete, and tossed them into a water tank.. they float, and are durable.
> --
> Charmaine Taylor Publishing
> www.papercrete.com
> www.dirtcheapbuilder.com
>
> Rub-R-Slate mix- from a series of Lessons
>
> A low cost, "green" building formula created by Jack Bays in the 1920's.
>
> Basic Asphalt Emulsion Information-for Rub-R-Slate use.
>
> In the 1920s Jack Bays developed a material he called Rub-R-Slate, which he
> used as a
>
> cushion flooring for factory workers. The information here is based on his
> basic formulas
>
> of clay, shredded cardboard and AE. I substitute shredded office paper and a
> commercial
>
> newspaper cellulose blown insulation product, (Cocoon brand) and/or sawdust.
> I like the
>
> sawdust best, and it is free and easily available where I live, in Northern
> California. Fine
>
> chopped straw, dry chopped shrubs can also be used, in fact, any dry
> organic, even
>
> seaweed, and grasses can be used.
>
> This is extra information that may help you with your experiments with
> papercrete and
>
> earthen floors or stabilized wall plasters.
>
> Asphalt Emulsion (AE) is a pudding-like additive to adobe and clay that will
> help
>
> waterproof it and stabilize the material. Is is available in 1-5 gallon
> cans, and drums, in a
>
> building supply store. Common brands are Henry 107, Black Jack, and Fortress
> to name
>
> three. Look in the roofing materials department, or in cellar and basement
> products area,
>
> where water proofing products are sold.
>
> Modern AE is a non-toxic, non off-gassing, tar-like substance, mixed with
> bentonite clay
>
> and water in stable suspension. AE is used for roofing and road/driveway
> coating. When
>
> added in small percentage to clay (5%-30%) it keeps clay from dissolving in
> rain or
>
> water. It is an ideal material for use in plasters placed around windows and
> doors for
>
> moisture protection/water intrusion.
>
> You can PAINT and plaster over an AE mix too.
>
> Using AE is not new, in the SW states it has been used for adobe houses for
> centuries,
>
> and "bitumen" has been used all over the world, especially the Middle East
> to protect
>
> clay bricks. It is painted on the base of buildings or added to adobes.
>
>
> I have made several varieties of mixes and I like the clay-Redwood
> sawdust-Asphalt
>
> Emulsion-sand mix the best for a very smooth plaster, and for flooring.
> Asphalt Emulsion
>
> has a "road tar" smell upon opening the can, but this dissipates in the mix
> and is not
>
> present when dry.
>
> Visit the website for the AE Mfg. Assoc.: http://www.aema.org/ for more
> information*.*
>
> Wipe down drips of excess with a wet cloth before it dries on your skin,
> tools, bowls.
>
> AE sticks tenaciously! but you can keep a bucket of water near and dunk
> tools, gloves,
>
> mixer blades in to keep AE from setting up.
>
>
> Keep the can lid on as AE evaporates in open air. Brand names I have used
> are: Henry
>
> 107, and Black Jack. Other brands can be found in hardware & DIY stores.
>
> Mix using same size bowls, cans, or buckets for volume measuring, add the AE
> last, or
>
> right before you plan to use it. Use clean water, paper, and clay with no
> leaves, twigs
>
> etc. to avoid harboring bacteria.
>
> Soft clay is simply clay sitting in water for a period of time to become
> soft, by lifting it
>
> out of the bucket with a kitchen colander or strainer you are getting clay
> and water in
>
> the right weight for experimenting.
>
> Apply the mix thinly onto cardboard, heavy paper, canvas to make test mixes.
> Filling a
>
> deep pan or other form takes far too long for the mix to dry, and there is
> shrinkage. Jack
>
> Bays recommended thin coats applied over each other to build up floors, etc.
>
>
> I have found this material is almost waterproof, I placed thin "RRS cookies"
> in water
>
> for 24 hours, and when broken open the insides were dry. This may make it an
> ideal
>
> plaster for absorbent materials like straw bales, papercrete, unstabilized
> adobes, etc.
>
> Conversely a thick coating over every surface inch may also mean no
> breathing of the
>
> surface wall either. This could be a problem for trapped moisture in organic
> materials.
>
> Mixing AE and clay with a variety of materials such as sawdust,
> cross-shredded paper,
>
> cellulose insulation, and adding sand makes a very nice mix that trowels
> easily, and is a
>
> pleasure to work with.
>
> Like papercrete materials this mix can also have cement in it Try
>
> adding AE to papercrete formulas after draining the water out (basic
> papercrete is a very
>
> wet mix that sheds excess water. Pre-drain, then try mixing AE in.
>
> Sand is recommended in making stabilized clay-adobes when using AE, in
> traditional
>
> use.
>
> Don't make samples unless the weather is dry.
>
> The best companion book for these formulas is Earth Brick Construction by
> Hubbell,
>
> #2025--$16.00, extensive AE information: mixing, testing, use is given.
>
>
> Essentially Rub-R-Slate and its other formula names are a highly stabilized
>
> papercrete mix. Heavy weight building paper-tar paper- is asphalt embedded.
> It might
>
> be possible to use this as a substrate to apply Rub-R-Slate mixes. ( I use
> heavy cardboard,
>
> or recycled pressed paper display boards.) Many modern products did not
> exist in Bay's
>
> time, so combine the best of both his recipes and new resources. Please let
> me know of
>
> your success and application use of these formulas.
>
> Caveat: Proceed with caution in mixing/building as with any materials and
> use common
>
> sense.
>
> Wear gloves
>
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