All tests are performed in accordance with the relevant South African National Standards (SANS) test method (where applicable).

Mandlethu has adopted quality control systems of ISI/IEC 17025:2005 including structured proficiency testing programmes, as well as frequent internal and external assessments, to ensure consistent reliable laboratory results.

Mandlethu offers the following services:

• Maximum Dry Density & Optimum Moisture Content (MOD)
• California Bearing Ratio (CBR)
• Atterberg Limits (Constants)
• Unconfined Compressive Strength (UCS) & Indirect Tensile Strength (ITS) of stabilized materials
• Sieve Analysis & Soil Mortar Analysis
• Aggregate Crushing Value (ACV)
• Flakiness Index
• Average Least Dimension (ALD)
• Bulk & Relative Densities
• Making & Curing Concrete Cubes
• Compressive Strength of Concrete Cubes, Cores, Bricks, Blocks & Pavers
• Tensile Splitting Strength of Concrete Paving Blocks
• Concrete Mix Designs & Verifications

Hard Rock Petrographic Analysis

• Concrete durability testing
• Rock Core/Borehole logging
• Soil Shear Box testing
• Consolidation Collapse Potential testing
• Triaxle soil testing

• Nuclear Density & Moisture Content Determination
• Material Sampling
• Test Pit Profiling
• Dynamic Cone Penetrometer
• Concrete Coring

• Mandlethu undertakes both onsite and laboratory testing of soils used in construction of road pavement layers and fills, building foundations and platforms, dams and related construction activities.
• Samples are tested and classified according to standard or project specifications.

• Mandlethu offers a comprehensive asphalt design and testing service and is supported by its sister company SRT.
• The designs are based on various procedures including Marshall and Superpave.
• The service includes testing and evaluation of various asphalt mixes, binders, emulsions and cutbacks.
• Mandlethu regularly assist consulting engineers and others with on-site supervision and testing.

• Mandlethu provides concrete testing services from the initial assessment and investigation at design stage, monitoring of batch plant operations and materials to placement phase, monitoring of workability (slump), vee bee, and manufacturing of concrete cube samples.
• Samples and testing are undertaken at predetermined frequencies pending project specifications for statistical analysis.
• Testing includes compressive and flexural strengths at various curing ages including accelerated curing periods, compressive strength of concrete core samples.
• Mandlethu regularly conduct concrete durability testing including oxygen permeability, water sorptivity and chloride conductivity

• Since aggregates constitute the majority of the materials used in asphalt and concrete mixes the importance of accurately determining the quality of these materials cannot be over emphasised.
• Mandlethu provides accurate testing and analysis of coarse and fine Aggregates.

Concrete

• Structural  
• Pavement
• Mass

Layer works Stabilisation / Modification

• GEMS
• LAMBS
• Foam Bitumen
• Cement Stabilisation
• Lime Stabilisation
• Emulsion