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Technical Guides
Practical guides on testing procedures, standards, and equipment selection.
The most comprehensive shear strength test for soils. Covers UU (ASTM D2850), CU (D4767), and CD (D7181) test types, equipment components, and Mohr-Coulomb envelope interpretation.
Step-by-step guide to the direct shear test — shear box apparatus, ASTM D3080 procedure, and determining cohesion c and friction angle φ for slope stability.
ASTM C78 third-point vs C293 center-point vs EN 12390-5: specimen dimensions, loading fixtures, and typical MR values for rigid pavement design.
Fast, low-cost rock strength index testing in the field. Covers PLT apparatus, three test modes, Is(50) calculation, and UCS correlation for rock classification.
How penetration grade classifies bituminous binders by hardness. Standard grades (35/50 to 160/220), equipment requirements, and step-by-step ASTM D5 / EN 1426 procedure.
How to run a sieve analysis on aggregate and soil — sieve shaker equipment, ASTM C136 and EN 933-1 procedure, and reading gradation curves for mix design compliance.
Casagrande cup vs fall cone for liquid limit, hand-rolled plastic limit, and plasticity index — how LL, PL and PI determine soil classification on the USCS chart.
Key parameters (Fy, Fu, elongation, yield ratio), standards comparison across ASTM A615, EN 10080, TS 708, and machine requirements for rebar tensile testing.
Full coverage of cement lab equipment: compressive/flexural testing (EN 196-1), Vicat consistency and setting time, Le Chatelier soundness, Blaine fineness — with equipment summary table.
How the LA abrasion machine measures aggregate degradation resistance — drum specifications, charge selection, procedure for ASTM C131 and C535, and acceptance limits by application.
Step-by-step guide to the BS 812-110 ACV test — cylinder apparatus, 400 kN loading procedure, and acceptance criteria table for road surface, base, and sub-base applications.
Standard vs Modified Proctor — hammer mass, drop height, layers, compactive effort, and how optimum moisture content (OMC) and maximum dry density guide field compaction control.
A complete guide to the Marshall stability test for asphalt mix design — equipment requirements, procedure, and compliance with ASTM D6927 and EN 12697-34.
Understanding the differences between ASTM C39 and EN 12390-3 concrete compression test standards — which machine to choose and how to stay compliant.
The California Bearing Ratio (CBR) test is essential for road subgrade design. Learn about the equipment, procedure, and ASTM D1883 / BS 1377 requirements.