#1 Water Content Test of Soil | NABL Accredited

Water Content Test of Soil
(IS 2720 Part 2 — Oven Drying Method)

Laboratory determination of the natural water content (moisture content) of soil samples by oven drying method per IS 2720 Part 2 — the most fundamental soil test, required for all geotechnical index and engineering property calculations.

Overview

What is the Water Content Test of Soil?

The Water Content (Moisture Content) of a soil is the ratio of the mass of water to the mass of dry solids, expressed as a percentage. It is determined by oven drying a known mass of moist soil at 105±5°C to constant mass. The difference in mass before and after drying represents the mass of water; water content w (%) = (mass of water / mass of dry soil) × 100.

Conducted as per IS 2720 Part 2, water content is the most fundamental measurement in geotechnical engineering — required for calculation of void ratio, degree of saturation, dry density from bulk density, liquidity index from Atterberg limits, and as a field control parameter for compaction monitoring. Global Lab determines water content on all soil samples received for geotechnical testing.

±0.5% Accuracy

Calibrated precision balances (0.01g resolution) ensure accurate water content.

Oven Drying at 105±5°C

Standard oven drying method per IS 2720 Part 2 — 24-hour minimum drying time.

Rapid Result — 24 Hours

Fastest soil test — results available within 24 hours of sample receipt.

All Soil Types

Applicable to sand, silt, clay, gravel, peat and organic soils.

NABL Certified Reports

All test and calibration results are backed by traceable measurements and standardized procedures.

Foundation for All Other Tests

Water content required as input for all compaction, strength and classification tests.

Test in Action

Water Content Test of Soil — Site Images

Moist Soil Sample in Tared Container Before Oven Drying

Oven Drying at 105°C — Minimum 24 Hours

Water Content Calculated from Mass Before and After Drying

Test Procedure

How the Water Content Test of Soil is Conducted

1

Container Taring

Clean oven-safe container (tin with lid) weighed and tared precisely to 0.01g.
2

Moist Sample Addition

Representative moist soil sample (minimum 30g for fine-grained, 300g for coarse) placed in container. Lid closed. Mass M1 recorded.
3

Oven Drying

Container placed in oven at 105±5°C. Lid removed during drying. Sample dried for 24 hours or until constant mass.
4

Dry Mass Measurement

Container removed, lid replaced. Cooled in desiccator. Mass M2 recorded.
5

Water Content Calculation & Report

w (%) = [(M1-M2)/(M2-Mcontainer)] × 100. Average of minimum 3 determinations reported. NABL report within 24 hours.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
IS 2720 Part 2	Methods of Test for Soils — Determination of Water Content	Water Content	Indian Standard
IS 1498	Classification and Identification of Soils for General Engineering Purposes	Soil Classification	Indian Standard
IS 2720 Part 28	Methods of Test for Soils — Determination of Dry Density by Sand Replacement	Field Density	Indian Standard
ASTM D2216	Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass	Water Content	ASTM

Applications

Where is the Water Content Test of Soil Used?

Natural water content of undisturbed samples from borehole and trial pits

Field moisture content monitoring during earthwork compaction

Water content for all index property calculations — Atterberg, PSD, compaction

Seasonal moisture variation assessment of expansive subgrade soils

Water content of compacted fill for as-built compaction verification

Moisture content for shrinkage and consolidation analysis

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsLegally valid IS 2720 Part 2 water content certificates — fastest NABL soil report.

24-Hour TurnaroundQuickest soil test — NABL report issued within 24 hours.

Minimum 3 DeterminationsThree parallel determinations averaged per IS 2720 Part 2 for statistical reliability.

All Sample TypesUndisturbed tube samples, disturbed bag samples, core samples and loose material.

Pan-India CoverageGeotechnical lab at all 7 NABL-accredited locations.

Always IncludedWater content automatically tested on all soil samples received for any geotechnical test.

Water Content Test of Soil(IS 2720 Part 2 — Oven Drying Method)