The Constructor

Methods to Reduce Efflorescence in Newly Constructed Masonry Walls

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Several methods and techniques are available to reduce the efflorescence in newly constructed masonry walls. Efflorescence reduction systems should be thoroughly executed otherwise the required result will not be achieved. Satisfactory implementation of these methods requires extensive knowledge and adequate understanding of each system. Therefore, this article will explore various methods used to decrease potential efflorescence on bricks.

Fig.1: Efflorescence on Brick Masonry Walls

Methods to Reduce Efflorescence in Newly Constructed Masonry Walls

Reduction methods for Potential efflorescence in newly constructed masonry walls are as follow:

Reduction of Water Penetration Especially Wind Driven Rain Water into Masonry Wall

There are several measures which can be used during the construction of masonry walls to decrease water that may ingress the wall. These measures are as follow: These components should be extended and exceed masonry wall face by 2.5cm and flashings and weep holes should be provided. It is recommended to slope (preferably 1:4) these components and attached to the masonry walls. Not only does the movement joints should be properly sized and positioned but also sealed sufficiently.

Expelling Penetrated or Condensed Water Out of Masonry Wall Quickly

Penetrated and condensed water in masonry wall can be discharged by considering the following techniques:

Fig.2: Masonry Wall Drainage System

Prevent the Contact Between Bricks which are Different in Chemicals Composition

Contacts between different bricks in masonry wall can be prevented as follows:

Reduce Quantity of Efflorescence Compounds in Materials of Masonry Wall

The reduction of efflorescence compounds in materials of masonry walls can be obtained through the following approaches: Read More: What is Efflorescence on Brick Masonry, Its Causes and Treatment Techniques? Types of Bonds in Brick Masonry Wall Construction and their Uses Defects in Brick Masonry due to Poor Workmanships and its Remedies Causes and Types of Cracks in Masonry Buildings and their Repair Methods Methods of Testing Compressive Strength of Masonry

Reference:

ASTM C15. Standard Guide for Reduction of Efflorescence Potential in New Masonry Walls. ASTM Committee C15. Philadelphia, p. 2. 2001. (C 1400 – 01). Brick Industry Association - Efflorescence Prevention and Control [S.l.], p. 2. 2009. KENNETH A. HOOKER. Reducing Efflorescence Potential: Understand how efflorescence occurs, select materials to minimize soluble salts, and detail to control water penetration. The Aberdeen Group. Aberdeen , p. 1. 1994.
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