Geotechnical control is carried out by a specialized team, which will be responsible for checking the materials used in the various phases of road construction and civil engineering structures, as well as monitoring their implementation.

LTPS will be responsible for the geotechnical control of road and concrete used in the various structures built within the project. This process is summarized in two main phases:

1. Checking of Material Quality:

LTPS will check the materials before their use. This operation includes:

1-1) Checking Materials Used in Road Earthworks:

• Particle-size analyses ;

• Atterberg limits;

• Chemical analyses ;

• Proctor tests ;

• CBR tests ;

• Unconfined compression tests.

1-2) Checking Aggregates Used in Untreated Gravel, Asphalt Concrete, and Hydraulic Concrete:

• Particle size analyses ;

• Sand equivalency;

• Methylene blue value;

• Los Angeles tests;

• Micro Deval tests;

• Aggregate cleanliness;

• Absorption.

1-3) Checking Hydrocarbon Binder Quality:

• Viscosity (cutback bitumen);

• Penetration;

• Softening point;

• Density.

1. 4) Checking the Quality of Hydraulic Binders:

   • Setting time;

   • Mechanical strength.

2. Implementation Control:

2.1 Earthworks:
The control of earthworks implementation includes:

1. • Compaction control using a density gauge;

   • Compaction control using a plate load test.

2.2 Paving Works:
The control of paving works implementation includes:

1. • Impregnation control;

   • Bond coat layer control;

   • Checking and approval of the mix design;

   • Calibration of the asphalt plant;

   • Binder content control;

   • Gradation control of the mix;

   • Control of the production and laying temperature of the asphalt;

   • Checking the physical and mechanical performance of the asphalt;

   • Compaction control of the asphalt.

2.3 Concrete Works:
The quality control of concrete includes:

1. • Checking the concrete mix design;

   • Control of concrete workability;

   • Control of concrete strength by crushing test specimens;

   • Verification of concrete strength using a rebound hammer;

   • Verification of concrete strength using ultrasonic testing.

2. Technical Supervision:
   The LTPS laboratory engineer will be responsible for managing the geotechnical control operations and preparing site reports and official records.

To accomplish its mission, the laboratory is equipped with the necessary material resources, including:

• A laboratory for "white" control (soil and aggregates):

  • Set of sieves;

  • Set of screens;

  • Mechanical and electronic balances (2kg ± 0.01g, 6kg ± 0.1g, 30kg ± 1g);

  • Oven;

  • Equipment for Atterberg limits tests;

  • Equipment for sand equivalent tests;

  • Proctor molds and rammers;

  • CBR molds;

  • CBR press.

• A laboratory for "black" control (bitumen and asphalt):

  • Set of sieves;

  • Set of screens;

  • Los Angeles apparatus;

  • Micro Deval apparatus;

  • Kuma gawa extractor;

  • Thermometer;

  • Viscometer;

  • Bitumen penetrometer;

  • Ball and ring apparatus.

• A laboratory for asphalt mix testing at 4 levels:

  • Asphalt mixer;

  • Plate compactor;

  • Gyratory shear press;

  • Rutting tester;

  • Apparatus for determining modulus and fatigue;

  • Climate chamber.

• A concrete control laboratory:

  • Concrete press;

  • Concrete molds;

  • Abrams cone;

  • Concrete thermometer.

• Microcomputers + Printer.

the LTPS laboratory has been provided with the necessary human resources, including:

• An expert engineer with over 15 years of experience;

• A civil engineer, responsible for quality control, with over 5 years of experience;

• Two highly skilled technicians in civil works with over 10 years of experience;

• Two laboratory operators with over 10 years of experience.