NH Jones Sand, Gravel and Building Aggregates

NH Jones Sand, Gravel and Building Aggregates

Where do Building Aggregates come from?

NH Jones Sand, Gravel and Building Aggregates serve Hereford, Herefordshire including all  the surrounding towns including Leominster, Kington, Ludlow, Tenbury and Monmouth.

Whilst everybody in the construction industry will use builders aggregates in their work, few people know how much work goes into producing them. So here is an overview for you.


The Extraction Process

To acquire the perfect aggregate for the job, there are certain steps which must be followed for extraction. The first step in the process is identifying the perfect place to blast for the required stone. Once the right place has been found, holes must be drilled for the explosives.

These explosives will allow us to release the stone we need for making the aggregate. Now it’s time for the blast, the almighty explosion that sends a bellowing rumble through the quarry.

A blast might yield anything up to 15,000 tonnes of stone; this could be as little as two weeks supply for a quarry.

Then the large pieces of stone will be collected and bashed down using an excavator with a pecker tip. Doing this will allow for the smaller broken down pieces of stone to be put into the crusher machine. The crusher does exactly what it says on the tin, and crushes! This large aggregate is crushed down to various sizes which then need sorting into categories. Once through the crusher, the remains are spilled out into a pile, waiting to be transported to the Screening machine. Using an excavator and a truck, the pile of smaller aggregate is then transported to the screener, which will wash and sort the piles.


The Screening And Washing Process

These new piles will consist of various sized aggregate which will later be used for different functions. Quarries generally produce a range of aggregate sizes from 2mm and 10mm all the way to 75mm and the gabion sized aggregate 150mm. The use of the aggregates will depend on the size of the aggregate and this is why it is important to screen the aggregate.


The machine in which this takes place, is a large vibrating screen box which consists of a number of various sized screens and meshes. This will separate the different sized aggregate like a sieve until they are all separated and washed. These sieves will separate the different sizes of aggregates and create different piles which will vary in sizes, ranging from larger 20mm to as fine as 2mm sand. During this screening process, the aggregate is washed and this is to remove any unwanted materials such as clay, silt and dirt which may be present. We do this simply so that there is no drying effect or impurities in the future. This could lead to cracking, and you do not want that!


Why Are Aggregates Important?

Aggregates are vital for the construction industry and there is an ever growing need for it in the world we live in today.

With the constant building of houses, roads and other construction activity, it’s important to keep producing aggregate.


Aggregates And Their Uses

One of the most common uses of aggregates is concrete. Concrete is used widely throughout the construction business. From foundations to all types of building work.

Ready mix concrete is also a large part of the construction industry and many builders have this delivered to site to save time by pouring the concrete straight into the foundation footings and for laying concrete slabs on top of which they build the houses and offices.


NH Jones Sand, Gravel and Building Aggregates serve Hereford and the surrounding areas including Leominster and Monmouth.

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