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.
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