How to minimize efflorescence in fresh concrete masonry walls

There are different types of methods which are very useful to lessen the efflorescence in new construction of masonry walls. Efflorescence reduction processes should be initiated on a regular basis to obtain the perfect result.

To use these processes in an efficient manner, sufficient knowledge and understanding is needed. Given below, the detail information on different types of processes which are most effective to reduce probable efflorescence on bricks.

Processes to decrease efflorescence in newly constructed masonry walls:

Lessening of water penetration into masonry wall
Instantly ejecting infiltrated or condensed water from masonry wall
Avoid the connection among the bricks having diverse chemicals composition
Decrease quantity of efflorescence compounds in materials of masonry wall

Lessening of water penetration specifically wind driven rain water into masonry wall.

Various measures are undertaken throughout the construction of masonry walls to reduce water that may enter into the wall. Given below, the details of measures:

1. Create a strong bonding among masonry units and mortar: A strong bond among masonry units is possible if specific construction measures are undertaken at the time of building masonry wall.

2. As for instance, employing mortar that supports masonry units, seal both bed and head mortar joints adequately if solid units are utilized, sufficiently fill bed and meet shell joints in case hollow masonry units are utilized, combine mortar joint from ousted face of the wall.
3. Proper precautions should be taken to get rid of water penetration, particularly rain, into partly constructed walls and wall opening.
4. Movement joints in the masonry wall should have been designed, arranged and filled in an efficient manner.

5. Close masonry wall-roof interface with flashing.
6. Build overhands to safeguard masonry wall from rain water.
7. It is recommended to add either appropriate water repellent admixture to concrete masonry units or water repellent coating to the concrete masonry wall.
8. Various masonry building components like chimney cops, sills and copings should be built up from solid masonry units, reinforced concrete, corrosion resistant metals or stone.

These components should be expanded and surpassed masonry wall face by 2.5cm and flashings and weep holes should be arranged.

It is advisable to slope (preferably 1:4) these components and affix them to the masonry walls. The movement joints should be perfectly sized and positioned as well as closed satisfactorily.

For further information, go through the following article theconstructor.org




Read more

~~~~~~~~~~~~~~~~~~~~~~~
Published By
Rajib Dey
www.constructioncost.co
~~~~~~~~~~~~~~~~~~~~~~~

About the Efflorescence on Brick masonry, its causes and treatment techniques

About Efflorescence on Brisk Masonry: It is often a white or a brown green or yellow powdery material which can be observed mainly in the winter season and it is produced from the mix of soluble salts and water.

The salt would drop on brick masonry and palpable itself as efflorescence when the water disappears and the color of the efflorescence is based on type of created salt. This efflorescence might vanish in summer but remains for the whole year.

Cause of Efflorescence on Brisk Masonry: There is a unique condition of occurring efflorescence and all the conditions should be met otherwise the brick masonry would suffer. There are three main three conditions offering the best conditions for efflorescence formation on brick masonry wall which are discussed here:
• The wall should be contained with soluble salts and that could be presented in masonry brick, mortar, adjacent soil and backing material.
• Water has to present in the brick masonry wall with the contact with soluble salt for the surface where water can be evaporated and left the salt.
• This wall will acquires pore structure for permitting the migration of soluble salt for dissolving it.
• And last of all, all the above conditions should be present for creation of efflorescence.

Factors affect the Efflorescence on Brisk Masonry:
• Temperature: An effect of high temperature falls on the efflorescence as it disappears water prior to reach the brick masonry surface.
• Water: Efflorescence is also frequent in water as water takes some time to reach the surface of the brick masonry.
• Wind
• Humidity

Sources of materials cause Efflorescence on Brisk Masonry:
• Soluble salt: There are a few sources for instance brick masonry, block masonry, mortar constituents like cement, sand, lime and admixture, grout components including cement, sand, aggregates and admixtures, contacting soil and ground water. The salts may be produced as the reactions between various constituents of brisk masonry walls and all soluble salts has the capability of producing efflorescence, like carbonates silicate, sulfate and chloride.
​• Moisture: The main source of it is the rain water especially which are wind driven and penetrate considerable water quality into the well.

Detrimental effects of Efflorescence on Brisk Masonry building: It generally damages the artistic value and the maintenance of the building. But it does not affect too much in the inner side of the building.

Control over Efflorescence on Brisk Masonry: The three conditions that are responsible for this should be controlled and proper action should be taken and as they are removal so can be washed to keep the bricks safe. But the thing is only removal and cleaning is not enough so it is required to seal the wall to avoid the problem permanently.

For more information follow theconstructor.org



Read Continue

~~~~~~~~~~~~~~~~~~~~~~~~
Published By
Rajib Dey
www.constructioncost.co
~~~~~~~~~~~~~~~~~~~~~~~~