Manufactured block paving is typically made from either of these two types of materials, clay and concrete. There are other kinds of materials that are used in the manufacturing of paving blocks such as rubber, stone, recycled plastic or crushed glass, but by far the most commonly used materials in the construction of block paving bricks are clay and concrete. Let’s take a closer look at the two main materials used in the construction of paving bricks.
Concrete block pavers
Concrete block paving is made up of a mix of stone or aggregates, stone dust and cement. The sizes of the aggregate used are typically 10mm down to 1mm dust.The dust in the aggregates is there to bind the stone and to create a denser stronger material. The aggregate and cement is mixed with water to create concrete, this is then mixed with a colour pigment to create the final coloured paving. The pigment colour is added to the concrete at various levels to create different colours to the paving. The concrete is then put into a mould and tamped, pressed or vibrated into place to make the blocks solid (no air gaps). There are various ways that the concrete is pressed into the moulds depending on the strength required to the paving blocks. The moulded concrete blocks are allowed to dry naturally before being turned out, inspected for quality and then stacked in pallets ready for use in driveways or patio projects.
Clay block paver’s
Unlike concrete paving which is a man made material, clay block paving is made from naturally occurring clay. The clay used is usually sourced locally,close to the manufacturing factory. The clay, if requiring a coloured clay product will have a colour mixed into it whilst the clay is in a workable form. Once the coloured clay is acceptable the clay is placed into a mould. The pavers are then allowed to slightly dry out naturally before being placed in an oven kiln and fired at a very high temperature. This process is similar to how a clay pottery is fired in a kiln.The process of firing or baking the clay pavers makes the pavers very hard. Once cooled the clay paving is then inspected and staked ready for distribution.
Now you briefly know the process in which clay and concrete pavers are made, lets look at some of the benefits and negatives of both types of paving.
Benefits of clay: Very hard wearing, excellent colours of paving, Will not fade or easily stain, Will not easily absorb contaminates, Easily cleaned.
Negatives of clay : Can be costly to buy. Very brittle, very slight variations in size can occur, hard to match pavers due to the naturally occurring change in clay colours. Clay paving bricks can be difficult to source/find for sale in a local area.
Benefits of concrete: Very cost effective, the colours of the block paving can be various/mixed ie. brindle, colours can be easily matched. Concrete paving is easily sourced from local suppliers who usually hold a good stock of supplies.
Negatives of concrete: Often need to be sealed against pollutants and contaminates. Easily absorb dirt. Not as tough as clay block paving.
I hope this helps you if you are wondering which type of block paving to choose for your driveway, clay or concrete block paving
Post time: 04-30-2017