Is you property in need of salt removal?
Didn’t you know too much salt can be a bad thing?
The Stain Eaters are known for our flexibility and wide range of cleaning solutions and as such were called on by a client for calcium deposits and tough salt removal on tiled flooring around a major local swimming pool.
This is a common problem in such areas but can extend to many environments not so familiar with the chemical reaction known as efflorescence.
Efflorescence (which means “to flower out” in French) is the loss of water (or solvent) to the air which causes hydrated or solvated salt to appear.
This reaction can occur in natural and built environments and may present a cosmetic problem (primary efflorescence), or also indicate serious structural weakness in porous construction material (secondary efflorescence).
Efflorescence cleaning has been a problem for many years as not only can it be difficult to remove properly, there is also a major challenge in stopping the salt deposits reforming.
First of all, there must be water present to dissolve and transport the salts. Groundwater is often a source of efflorescence as it can easily carry or move the salts to the surface but there must also be channels through which the water can move and migrate towards the surface.
The more dense the material, whether it be brick, stone, stucco or concrete, the more difficult for the water to transport salts to the top. Conversely, the more porous the material, the greater the ease with which salts are transported and deposited.
Removal and prevention of Efflorescence
Low absorption is the best assurance against efflorescence. Properly graded aggregates, low water-cement ratio, good compaction and proper curing practices will produce concrete of maximum density and low water absorption.
While there is no permanent cure for efflorescence, there are several efflorescence removal methods used by The Stain Eaters that offer the best possible removal and protection against salt deposits occurring.Several methods are suggested. One is to use water under pressure and another is our highly specialised chemical treatment with subsequent flushing of water.
Acid applied to brick masonry, without previous wetting, may cause “burning” or discolouration of the brick and may also eat into the mortar. In extreme cases we may also use light sandblasting for removal of stubborn efflorescence which has been left to accumulate for many months.
Allowing the surface to dry thoroughly and then using a stiff brush prior to washing with water also aids in the prevention of salts re-penetrating the surface but there is no absolute cure for salt deposits reforming.Much care must be taken in applying acid to any masonry surface as the acid will attack not only the calcium carbonate and calcium sulphate efflorescence, but also other calcium compounds to produce calcium salts such as calcium chloride.
It is, therefore, very important to neutralize the acid before it can attack other compounds and that is why our expert surface restoration technicians are recommended for such work as they offer professional salt and efflorescence removal at extremely competitive prices.
Don’t wait until salt has taken over your property, give us a call today on 1300 305 307 or visit our website by clicking below: