Field Density Test (FDT) – Sand Cone Method | Step-by-Step Explanation for Civil Engineers скачать в хорошем качестве

Field Density Test (FDT) – Sand Cone Method | Step-by-Step Explanation for Civil Engineers

📘 Welcome to Mar-el Tube – your trusted source for civil engineering field and laboratory test demonstrations! 👷‍♂️👷‍♀️ In this video, we’ll explore Field Density Test (FDT) — one of the most important site tests used to determine the in-place density of soil for road and building construction. We’ll walk you through every stage of the process including: ✅ 1️⃣ Sand Preparation: Learn how to dry, sieve, and store the standard sand used for testing. The sand must be clean, uniform, and completely dry to ensure accurate results. ✅ 2️⃣ Volume of Mold Calibration: We’ll show you how to determine the exact volume of the sand cone apparatus mold by filling it with water or calibrated sand — an essential step before testing in the field. ✅ 3️⃣ Density of Sand Determination: Find out how to calculate the bulk density of the standard sand by measuring the mass of sand that fills a known volume. This value will later help in determining the field density of the compacted soil. ✅ 4️⃣ Conducting the FDT in the Field: Watch how the hole is dug, soil sample is collected, and the sand cone apparatus is used to fill the hole. We’ll then calculate the dry density and degree of compaction to check if the soil meets specification. 📏 Formula Used: \text{Dry Density} = \frac{(M_2 - M_1)}{V} \times \frac{100}{100 + \text{Moisture Content}} 📊 Applications: Road embankments Subgrade and base course compaction Airfield and dam construction 💡 Tip: Always perform three trials and take the average for accurate results. 📺 Watch till the end to see how to interpret the results and compare with the Maximum Dry Density (MDD) from the Proctor Test. 👍 Don’t forget to Like, Subscribe, and Share for more civil engineering tutorials and lab demonstrations! #FDT #SandConeTest #CivilEngineering #FieldTest #MarElTube #ConstructionMaterials #SoilCompaction #RoadConstruction #civilengineering #academicwriting #constructionmaterials