Episode-03 CBR Test (AASHTO T193) | Moisture-Density Relation & Compaction Procedure Explained

Описание: नमस्कार इंजीनियर्स! 👷‍♂️
Welcome back to our Highway Material Testing Series!
In this episode, we will understand Section 6 & 7 of AASHTO T193-99 (2003) —
👉 Moisture-Density Relation and
👉 CBR Test Procedure (Bearing Ratio at Optimum Water Content).

This part explains how to determine the Optimum Moisture Content (OMC) and Maximum Dry Density (MDD) using T99 or T180 Compaction Test, and how to prepare CBR specimens with different compactive efforts (10, 25, 56 blows/layer).
We’ll also learn how to take moisture samples (T265 method) and how to achieve correct density range (95% to 100% of MDD) for soaked and unsoaked CBR tests.

📘 Topics Covered:

Section 6.1: Bearing Ratio at Optimum Water Content

Section 6.2: Bearing Ratio for Range of Water Content

Section 7: CBR Procedure – Compaction, Sampling & Weighing

Notes on 4-inch vs 6-inch Mold

Importance of Compactive Effort & Moisture Control

🎯 Based on Standard:
AASHTO T 193-99 (2003): Standard Method of Test for the California Bearing Ratio (CBR) of Laboratory-Compacted Soils.

🎓 Perfect for:
Civil Engineering Students | Diploma & B.Tech Projects | Highway Material Testing Lab | GATE / SSC JE / RRB JE Aspirants

📍 Watch previous episodes:
👉 Episode 1 – Introduction to CBR Test
👉 Episode 2 – Apparatus & Sample Preparation

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