Hiring the correct concrete mixer and mixing concrete correctly is vital for durable and long lasting foundations, garden walls and patios. Concrete is a mixture of cement, sand, small stone or gravel and water. It has many applications, from fence posts to motorway bases and, because of this; there are a range of mixers available.
A good trait to watch for in mixing is shininess. The mix should be dull in appearance. If there is a shine to the mix, its too wet initially. This is corrected by adding more dry ingredients- cement mainly. It will make the mix richer but this will only add strength eventually.