Service

Geotechnical laboratory testing to ASTM & BS standards

Four in-house laboratories running the full geotechnical suite — classification, strength, compressibility and chemical analysis on soil, rock, aggregate and water, to ASTM and British Standards.

Overview

Design parameters come from the laboratory. Bearing capacity, settlement, slope stability and durability specifications all trace back to a test result, which is why sample handling, calibration discipline and turnaround matter as much as the test list itself.

Horema operates its own laboratories rather than subcontracting them. Samples taken by our field crews enter our own testing chain, under one custody record, which protects undisturbed sample quality and keeps programme control in one place.

Chemical testing sits alongside the mechanical suite because in Egypt it frequently governs. Sulphate, chloride and pH results on coastal and industrial sites determine concrete mix design, cement type and protective systems for buried structures — decisions that are expensive to revisit after construction.

Horema in-house geotechnical laboratory equipment used for soil and materials testing

Methods & standards

Test methods and the standards they follow

Particle size distribution & hydrometer

ASTM D6913 · ASTM D7928 · BS 1377-2

Sieve and sedimentation analysis defining gradation, fines content and the coarse/fine split that drives classification, filter design and fill suitability.

Atterberg limits & classification

ASTM D4318 · ASTM D2487 (USCS) · BS 1377-2

Liquid limit, plastic limit and plasticity index, combined with gradation to classify soils under the Unified Soil Classification System and identify expansive and problematic materials.

Moisture content, specific gravity & density

ASTM D2216 · ASTM D854 · ASTM D7263

Index properties underpinning every subsequent calculation of void ratio, saturation, unit weight and effective stress.

Compaction (Proctor) testing

ASTM D698 · ASTM D1557 · BS 1377-4

Standard and modified compaction curves establishing maximum dry density and optimum moisture content as the reference for field compaction acceptance.

Shear strength — direct shear, triaxial & UCS

ASTM D3080 · ASTM D2850 (UU) · ASTM D4767 (CU) · ASTM D2166

Drained and undrained strength parameters for bearing capacity, slope stability and earth pressure analysis, including unconsolidated undrained and consolidated undrained triaxial testing with pore pressure measurement.

One-dimensional consolidation

ASTM D2435 · BS 1377-5

Compression index, preconsolidation pressure and coefficient of consolidation for settlement magnitude and time-rate prediction — the governing tests on soft Delta and coastal deposits.

Collapse potential & swelling

ASTM D5333 · ASTM D4546

Assessment of collapsible desert soils on wetting and of swelling pressure in expansive clays, both recurring risks on Egyptian development sites.

Rock testing & point load index

ASTM D7012 · ASTM D5731

Uniaxial compressive strength, point load index and core logging parameters for rock-socketed piles, excavation assessment and rippability.

Chemical testing — sulphate, chloride, pH & organics

BS 1377-3 · ASTM D4972 · ASTM D2974

Water-soluble sulphate, chloride content, pH, carbonate and organic content on soil and groundwater, feeding concrete durability class, cement selection and buried-structure protection.

Where it applies

Typical applications

Foundation design parameters for towers, bridges and heavy plant
Settlement prediction on soft coastal and Delta deposits
Slope stability and retaining structure design
Fill suitability and earthworks specification
Concrete durability specification in aggressive marine and industrial ground
Rock socket and excavation assessment

What you receive

Deliverables

Test schedule mapped to borehole, sample reference and depth
Individual test certificates citing the standard applied
Summary tables of index, strength and consolidation parameters
Classification profile per borehole under USCS
Chemical results with durability interpretation where instructed
AGS format data export on request

Common questions

What engineers ask us about laboratory testing

Which laboratory tests are needed for foundation design?

A typical foundation package combines index testing (gradation, Atterberg limits, moisture content, specific gravity) to classify the soils, strength testing (direct shear or triaxial, and unconfined compression in cohesive soils) for bearing capacity, and one-dimensional consolidation for settlement. Chemical testing is added wherever groundwater or soil may be aggressive to buried concrete.

Why does sulphate and chloride testing matter in Egypt?

Coastal, sabkha and industrial ground across Egypt frequently carries elevated water-soluble sulphate and chloride. Sulphate attacks hardened concrete and chloride drives reinforcement corrosion, so the measured concentrations determine the concrete exposure class, the cement type and any protective coating or membrane specified for foundations, pile caps and buried services.

What is the difference between UU and CU triaxial testing?

An unconsolidated undrained (UU) test measures the undrained shear strength of a sample at its in-situ moisture state and suits short-term stability checks in saturated clays. A consolidated undrained (CU) test with pore pressure measurement consolidates the sample to a defined effective stress first, yielding effective stress parameters used for longer-term stability, slope and retaining wall analysis.

Does Horema run its own laboratories?

Yes — four in-house laboratories cover soil, rock, aggregate, water, chemical and construction materials testing. Samples collected by Horema field crews are tested within the same organisation, keeping custody, calibration and turnaround under one accountable chain.

Where we have done it