Sand Replacement Test Explained | Field Dry Density with Actual Data

How is field dry density measured when the excavated test hole has an irregular shape? This video follows an actual sand replacement field test and explains the complete measurement chain using synchronized animation and anonymized field data. Topics covered: Standard sand requirements and calibration Preparing the tray and excavating the field hole Recovery and weighing of wet soil Placing the sand-pouring cylinder and operating the shutter Cone correction and sand-in-hole mass Rapid calcium-carbide moisture measurement Step-by-step calculations for two anonymized trials Field dry density and relative compaction Verification required when relative compaction exceeds 100% Anonymized recorded data: Calibrated sand density: 1.405 g/cm³ Cone correction: 2553 g Corrected water content: 14.94% Laboratory maximum dry density: 1.970 g/cm³ Trial A: 1.831 g/cm³ and 92.9% relative compaction Trial B: 2.104 g/cm³ and 106.8% relative compaction A value above 100% should not be hidden or accepted automatically. Verify the laboratory reference, material match, moisture correction, sand calibration, test-hole geometry, test method and any required oversize correction. Procedure references: IS 2720 (Part 28) and IS 12175. Always follow the applicable project specification, current standard, equipment calibration and safety procedure. 00:00 Introduction and purpose 00:18 Standard replacement sand 00:29 How sand mass gives hole volume 00:42 Preparing the tray and excavating the hole 01:07 Weighing the recovered wet soil 01:28 Placing the cylinder and pouring sand 01:45 Cone correction and sand-in-hole mass 01:56 Rapid moisture meter principle 02:27 Trial A calculation 03:03 Trial B calculation 03:31 Relative compaction results 03:59 Why a result above 100% must be verified 04:10 Complete measurement-chain summary #SandReplacementTest #FieldDryDensity #SoilMechanics #GeotechnicalEngineering #CivilEngineering #SoilCompaction #RelativeCompaction #ConstructionQualityControl #FieldTesting #EngineeringEducation