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BS ISO 13061-16:2025 Physical and mechanical properties of wood. Test methods for small clear wood specimens - Determination of volumetric swelling, 2025
- undefined
- Foreword [Go to Page]
- Part 16: Determination of volumetric swelling
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Sampling
- 6 Stereometric method [Go to Page]
- 6.1 Apparatus [Go to Page]
- 6.1.1 Measuring instruments, capable of determining dimensions to an accuracy of 0,02 mm, fitted with parallel flat ends each of diameter 5 mm to 8 mm and applying a clamping force which will not cause any deformation greater than the accuracy of the ...
- 6.1.2 Forced convection oven that can be maintained at a temperature of (103 ± 2) C throughout the drying chamber for the time required to dry the specimen to the end point shall be used. The oven shall be vented to allow the evaporated moisture to e...
- 6.1.3 Desiccator, a vapour-tight container with absorbent material (e.g. silica gel, calcium chloride, etc.) to maintain the air dry.
- 6.1.4 Vessel, containing distilled water.
- 6.1.5 Balance, accurate to 0,001 g.
- 6.2 Preparation of test pieces [Go to Page]
- 6.2.1 Dimensions of test pieces [Go to Page]
- 6.2.1.1 Test pieces shall be cut from wood in the air-dry state in the form of rectangular prisms.
- 6.2.1.2 The size of the prism shall be at least 20 mm square in radial and tangential directions and at least 5 mm along the grain if the longitudinal swelling is neglected in the measurements.
- 6.2.1.3 If the longitudinal swelling is considered in the determination, the length of the prism along the grain shall be not less than 100 mm.
- 6.2.2 Inclination of annual rings of test pieces
- 6.2.3 Marking of measurement points
- 6.3 Procedure [Go to Page]
- 6.3.1 Determination of the dimensions of test pieces in oven-dry state
- 6.3.2 Determination of the dimensions of test pieces in fully saturated condition
- 6.4 Calculation and expression of results
- 7 Immersion method [Go to Page]
- 7.1 Apparatus [Go to Page]
- 7.1.1 Forced convection oven, that can be maintained at a temperature of (103 ± 2) C throughout the drying chamber for the time required to dry the specimen to the end point shall be used. The oven shall be vented to allow the evaporated moisture to ...
- 7.1.2 Desiccator, a vapour-tight container with absorbent material (e.g. silica gel, calcium chloride, etc.) to maintain the air dry.
- 7.1.3 Vessel, containing distilled water.
- 7.1.4 Balance, accurate to 0,001 g.
- 7.2 Preparation of test pieces [Go to Page]
- 7.2.1 Test pieces for determining volumetric swelling by immersion method may be made in any shapes and shall be at least 4 cm3 in volume.
- 7.3 Procedure [Go to Page]
- 7.3.1 Determination of the volume of test pieces in oven-dry state
- 7.3.2 Determination of the volume of test pieces in fully saturated condition
- 7.4 Calculation and expression of results
- 8 Test report [Go to Page]
