29 May 2020

Table of Contents for Mat-Vantage


Bonding AAC blocks


With autoclaved aerated concrete blocks emerging as the ideal alternative for conventional bricks, there is a growing need to use self curing additives to deliver successful sustainable structures.


The increasing popularity of green buildings along with the rising price of steel, cement and such other conventional raw materials have led the construction industry to seek more energy efficient and easy to use building products. The scenario has become more critical due to the need to deliver projects within a stipulated timeframe and budget.

The dire need to deliver energy efficient and easy to construct structures has resulted in a growing market for autoclaved aerated concrete (AAC) blocks. The new age construction material proves to be an ideal building component to construct green structures as it is manufactured through a non-polluting manufacturing process, wherein the industrial waste fly ash is often recycled as its prime raw material. Though one AAC block is six times the size of a normal brick, the product’s light weight feature – three times less weight than a brick – has made it particularly popular in the real estate sector.

Though the AAC blocks prove to be an ideal solution for construction, due to their high absorbent nature, such building components require a high quality bonding agent to support the laying process. Thanks to technological advancements, the solution to such problems are easily available in the Indian construction market. These mortars are primarily used to hold the blocks in place and also assist in enhancing the structure’s thermal insulation. Increasing advancements in the field of building materials and specialty chemicals have also resulted in transforming the usage of traditional mortars to highly advanced and high strength thixotropic mortar, for laying these lightweight AAC blocks.

These self curing cementitious mortar are designed to be used with water; the refined adhesives add high strength and create more bonding while laying the AAC blocks during construction. The products have resulted in not just achieving excellent adhesion but also in reducing the time required for mounting the blocks. The usage of porous blocks together has today opened a new path for the builders to also enhance the thermal insulation and structural strength of projects built with AAC blocks. Such bonding agents supports better build quality, enhanced thermal and acoustic performance, shorter construction timelines and maximum usage of raw materials. These polymeric additives and binders ensure that the high bond strength is achieved leading to superior masonry strength and excellent load-bearing capacity.

According to analysts while AAC blocks help to decrease over 50 per cent of green house radiation and over 60 per cent integrated energy on the surface of brick, the usage of polymeric additives has particularly helped in increasing the structure’s overall strength and bonding capacity. However, the manufacturers
feel that the builder and developer community yet needs to be more aware and proactive towards using such bonding components.


Key Benefits

  • Easy to use
  • Can be mixed with water
  • Self curing
  • Increased Strength
  • Improved shock and impact resistance
  • Improved adhesion between block
  • Improved tensile strength

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