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Participant

Join Date: Aug 2011
Posts: 1

Effloresence

08/05/2011 12:38 PM

doing a project investigating clays, but there is aproblem of effloresence in these, green, yellow and white, inid to reove these, because they low the quality of brick that are made from these, how to are get rid of this kinda effloresence.

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Guru
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#1

Re: Effloresence

08/05/2011 12:50 PM

From Wiki:

Protecting against efflorescence

It is possible to protect porous building materials such as brick, tiles, concrete and paving against efflorescence by treating the material with an impregnating, hydro-phobic sealer. This is a sealer which repels water and will penetrate deeply enough into the material to keep water and dissolved salts well away from the surface. However, in climates where freezing is a concern, such a sealer may lead to damage from freeze/thaw cycles.

Efflorescence can often be removed using phosphoric acid. After application the acid dilution is neutralised with mild diluted detergent, and then well rinsed with water. However, if the source of the water penetration is not addressed efflorescence may reappear.

Common rebar protective measures include the use of epoxy coating as well as the use of a slight electrical charge, both of which prevent rusting. One may also use stainless steel rebar.

Certain cement types are more resistant to chlorides than others. The choice of cement, therefore, can have a large effect upon the concrete's reaction to chlorides.

Today's water repellents allow the wall to breathe therefore eliminating worry about freeze-thaw cycles.[citation needed] Years ago, the water repellents trapped moisture in the masonry wall creating more problems than they solved. Condensation in areas that experienced the four seasons were much more problematic than their counterparts.

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Power-User

Join Date: Aug 2009
Posts: 205
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#2

Re: Effloresence

08/14/2011 2:00 PM

Try www.buddingco.com

They have chemicals for efflouressence removal on various surfaces

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