Objective

For determination of moisture content of timber.

ReferenceStandards

IS : 1708 (Part 1)-1986

Equipment & Apparatus

• Balance(0-10 kg)
• Oven (300⁰c)

Preparation of sample:

The dimension of sample to be tested is 2.5 cm in length and 2 x 2 cm or 5 x 5 cm in cross-section.

Procedure

1. 样品重量(W₁) with accuracy of 0.001g in a weighing balance and then dried in a well ventilated oven at temperature of 103±2⁰C.
2. The weight (W₂) is recorded at regular intervals. The drying is considered to be complete when variation between last two readings does not exceed 0.002 g. The final weight is taken as oven dry weight.

Calculation

The loss in weight expressed as a percentage of the oven dry weight, is taken as the moisture content of the specimen.

W₁= Weight of sample at test in g,and

W₀= Oven dry weight of sample in g

Report

The moisture content of the soil is reported to two significant figures.

Safety & Precautions

• Use hand gloves while removing containers from oven after switching off the oven.
• To check electric supply
• Thoroughly cleaned & dried the container before testing.
• Special care should be taken that no outer air enters when using the balance.
• Use safety shoes & aprons at the time of test.