patio slab

There are a number of factors to consider when determining the thickness of a concrete slab, including the type of activity that will take place on the slab, the loads that will be placed on the slab, and the soil conditions underneath the slab. In general, however, most concrete slabs should be at least 4 inches thick in order to provide adequate strength and support. If you're unsure about how thick your concrete slab needs to be, consult with a professional engineer or contractor who can help you assess your specific situation.

There is no one-size-fits-all answer to this question, as the cost of concreting will vary depending on a number of factors such as the size and scope of the project, the type of concrete used, and the location. However, in general, you can expect to pay between $50 and $100 per square metre for concreting in Australia. 

Some things that will affect the cost of your concreting project include:

 - The size of the job: The bigger the job, the more it will cost. This is because larger projects will require more concrete, and possibly even specialised equipment.
 - The type of concrete used: There are various types of concrete available

Type GP cement—general-purpose cement with low heat of hydration Used in concrete for precasting, general construction (foundations, footings, flagging, drivable applications), and masonry units not requiring accelerated strength development 

 Portland cement is not a brand name. It is the generic name used for a type of hydraulic cement produced by processes that lead to a calcium silicate product with different proportions of calcium,silicates, and alumina. The historical Roman-derived materials were much coarser and contained more magnesium oxide and iron oxide than modern materials. The term "Portland" is oftentimes used synonymously with "binder" or "glue".