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MATERIALS TESTING

Chemical

Organic Impurities. Moisture Content. PH and conductivity.

These purity, concentration and moisture content tests allow our clients to determine the quality and readiness of different materials.

Our accredited laboratories and mobile facilities are equipped to perform the following chemical testing services according to testing standards set by ASTM, SANAS, BSI and more.

Chemical

SERVICE OFFERING

01


Organic
Impurities

This test is done to determine the short-term retardation and long-term deleterious effect. If there is any indication of organic impurities, other tests can be done to determine if the presence may have an influence on the properties of the product.


02


Chloride
Content

This method specifies the determination of the chloride content in aggregates. The chloride content in aggregates can have a negative binding effect in some construction applications.


03


Water Soluble
Salt Content

This standard specifies a method for determining the total water-soluble salt content of fine aggregates and of fines in aggregates for base courses. Water-soluble salts can be detrimental to roads, concrete and stabilized foundations for paved areas.


04


Deleterious Clay
Content

This method determines whether the clay content of the fines of an aggregate contains deleterious swelling or active clay minerals, such as smectites, which are usually resultant from weathering of rock. The method also indicates to what extent an aggregate requires to be further investigated to determine its suitability for specific applications.


05


Initial Stabilizer
Content

This test is used to determine the percentage of stabilizer that will first be absorbed by the material to neutralize acidity levels before stabilizing will take effect. Conductivity is used to measure the ability of a solution to carry an electric current.


06


Moisture in
Asphalt

Used to determine the percentage moisture in a freshly mixed hot mix asphalt (HMA) mix.


07


Plasticity index
Hydrometer test

To determine the particle size distribution of materials to detail the silt and clay percentages, especially of material smaller than 2mm.


08


Rock Durability
Using 10% FACT

Used to determine the strength of the aggregate sample after it has been exposed to ethylene glycol that acts like a weathering agent.


09


Back-titration

To determine the percentage of stabilizer added during the construction phase to see if the design was adhered to and if proper mixing was achieved on site.


10


Particle &
Relative Density

To define the weight or density of a material.


11


Methylene
Blue

This is a rapid qualitative test for determining whether the clay content of the fines of an aggregate contains deleterious swelling clay minerals, such as smectites, which could adversely affect the quality of the asphalt mix.


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