Unbound Aggregates and Hydraulically Bound MixturesUKAS Accredited
Concrete Site Testing
FIND OUT MOREUnbound aggregates and Hydraulically Bound Materials
Delivered crushed rock materials, recycled aggregates and drainage gravels are all produced to a specification and in order to confirm a delivery is in order loads are sampled at regular intervals to enable laboratory testing for compliance.
Primarily the sieve analysis (grading) and the moisture content are confirmed as these have the most immediate effect on the works into which the material is to be incorporated.
Sieve Analysis
Sieve analysis or “Grading” is the process of splitting a sample of unbound material into the various decreasing sizes to identify the range of particles and thereby the material’s likely characteristics. Using a set of calibrated sieves, a graphical representation known as a Particle Size Distribution graph or PSD for short can be established which can be used to classify an in-situ material or confirm compliance of a bought in processed material.
This test is therefore an integral part of quality control regimes in civil engineering works. Grading analysis for classification purposes is carried out to BS 1377-2 and for aggregate compliance is carried out to BS EN 933-1. In both cases the sieve sets are dictated by the specification for the aggregate, as-raised materials will need to be classified according to Table 6/1 of Series 600 of the Specification for Highway Works Volume 1 whereas processed aggregates each have a specification according to the required use. This will be different for drainage materials, concrete aggregates and sub bases for instance.
Aggregate Testing Services:
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Frequently Asked Questions
The size of sample depends on the material and the reason for the testing. Simtec Materials Testing can offer advice once we know the nature of the tests required. The more information you can supply, for example, client, site name, date sampled, material type, specification etc the more accurately we can advise you. A purchase order is normally required at this stage.
We specialise in a range of testing
We hold UKAS accreditations for the majority of tests we offer both on site and in the laboratory
FIND OUT MOREOur other range of services
Asphalt and Other Bituminous Materials
FIND OUT MOREConcrete
FIND OUT MOREDiamond Coring
FIND OUT MORESoil, Earthworks and Foundations
FIND OUT MOREConstruction Materials Testing
FIND OUT MOREConcrete Cube Testing
FIND OUT MORECBR Testing
FIND OUT MOREAsphalt Testing
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- Utilities
- Quarrying
- Airports and Associated Works
- Rail
- Industrial Development
- Commercial
Purpose-fit for all sectors
Utilities
The compliance of materials used for the reinstatement of utility trenches and excavations are undertaken for many service providers. Simtec also provides end product testing including surface texture and ride quality.
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Quarrying
Simtec are able to sample and test the quality of processed quarry materials on a routine basis. Technicians can be supplied on a longer term basis to satisfy quality control requirements.
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Airports and Associated Works
The quality of both bituminous and cementitious materials are regularly tested by Simtec on runway works in addition to the routine sampling and testing of delivered materials. We also test the surface irregularity of the finished runway surfacing.
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Rail
Rail ballast, both newly delivered or uplifted for recycling can be sampled and tested for compliance to specification.
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Industrial Development
Simtec have the facility to provide on-site and laboratory testing services for all aspects of commercial development including plate loading tests for piling rig and crane placement.
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Commercial
In addition to the routine testing of delivered, processed materials, Simtec can provide testing of formation strength and stiffness, fresh concrete testing, coring of hardened concrete and bituminous material quality control for roads and car parks.
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