What’s in a brick, then? Most generally, bricks are made from clay. Raw clay is mixed (to decrease shrinkage) with sand. Before being pressed into steel moulds, using a hydraulic press, the mixture is ground and mixed with water. Then the bricks are fired to 1,000 centigrade, locking in their strength. Modern brick-making involves rail kilns, where bricks are placed on a conveyor belt through a kiln, slowly moving to achieve continuous production.You may find more details about this at Masonry Brick Contractors.
Not all bricks are the same, of course. Some for example, are redder, others yellow or pale. The mineral content of the clay used determines the colour. So, while pale bricks have a higher lime content, red bricks have a high iron content. Also, the hotter the temperature, the darker they will be when shooting the bricks. Modern bricks made of concrete appear to be grey. So what are bricklayers like to do with a brick? First of all, bricklaying is a manual task, so it is important that bricks can be quickly picked up and treated with one hand so that with the other hand, cement can be laid with a trowel. It makes the work of bricklaying easier. But, depending on the essence of the work, there are other factors. The colour, density, thermal characteristics, fire resistance and size of the brick can all be important. Large concrete blocks are also used for internal, unseen labour by bricklayers. Not too many are needed because they are bigger, so a wall will go up easily with two bricklayers on the job. The colour or even shape will obviously be critical for creating the right effect with decorative or exposed brickwork. Bricks started life as a step towards building stronger buildings that are more permanent. But today, not only for houses and walls, but also for pavement and pedestrian precincts – the new version of cobbles – bricklayers use them