Regardless of what kind of concrete blocks are used, the houses made of them are nicely-looking, durable, and have excellent heat and sound insulation characteristics. In addition, concrete blocks used in construction are resistant to fire, water and other weather disasters. Their characteristics are similar to those of bricks.
Concrete blocks facilitate the construction process, as they are large in volume and allow you to use a special glue as a binding material.
This will reduce the total expenses.
In addition to the above characteristics, various colorants may be added into concrete during its mixing. This will allow to build a house of any color scheme to meet the individual needs of the consumer.
Cellular concrete (aerated concrete, gas silicate, etc.) can also be used in the construction. This provides an advantage in the construction of the foundation. Since the building material is not very heavy, there is no reason to lay a massive foundation structure. The use of light foundations allows to save a lot of money during construction.
Tools and accessories for block laying
When erecting walls using concrete blocks, worker uses a set of tools for blocks similar to that for bricks. However, there are slight differences. When there is a need to lay not a whole block, but only a part of it, a pick-hammer is suitable to fit it to required size only when working with slag stone and lightweight aggregate. To cut an aerated concrete block to a required size, a manual hacksaw should be used.
Slightest irregularities on horizontal rows of concrete blocks are ground off with a special grater. There are other tools for block laying that are at each stone layer’s disposal.
Foamed concrete is easily cut with a piece of a thin steel wire. Foam and aerated concrete blocks sometimes are laid using glue instead of mortar. Adhesive mixtures are easier to apply evenly with a spatula, a wide trowel or a special device consisting of a tray, a sponge or a napped roller. Such device for block laying saves both time and mixture.
Finally, adhesive mixture may be applied with a conventional paint roller using a tray for paint.
Mortar or adhesive?
Many people hesitate choosing between mortar and glue for this purpose. Blocks of slag stone and lightweight aggregate are laid on a conventional mortar. When working with the foamed concrete (and especially aerated concrete), there is a need of a special adhesive mixture. Porous concrete absorbs moisture very quickly and does not allow conventional mortar to make a reliable bind. It is necessary to use special water-retaining additives. All the necessary materials are present in ready-made adhesive solutions designed specifically for bonding foamed and aerated concrete slabs. Ready-made solutions cost about twice as much as conventional solution.