ISO 22157:2019
(Main)Bamboo structures — Determination of physical and mechanical properties of bamboo culms — Test methods
Bamboo structures — Determination of physical and mechanical properties of bamboo culms — Test methods
This document specifies test procedures for specimens obtained from round bamboo culms. The data obtained from the test methods can be used to establish characteristic physical or mechanical properties to be used in structural engineering design or for other scientific purposes. This document provides methods for evaluating the following physical and strength properties: moisture content, density, mass per unit length; strength properties parallel to the fibre direction, compression, tension and bending, and strength properties perpendicular to the fibre direction, tension and bending. It also provides methods to estimate moduli of elasticity in bending, compression and tension parallel to fibres, and bending perpendicular to fibres. The test methods reported in this document are intended for commercial testing applications. The test methods reported in this document are intended for commercial testing applications and can also be adopted as benchmark methods for scientific research. This document is organized to provide requirements for standard tests to be carried out to determine the material properties of full-culm bamboo as a structural material.
Structures en bambou — Détermination des propriétés physiques et mécaniques des tiges de bambou — Méthodes d'essais
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 22157
First edition
2019-01
Bamboo structures — Determination
of physical and mechanical properties
of bamboo culms — Test methods
Structures en bambou — Détermination des propriétés physiques et
mécaniques des tiges de bambou — Méthodes d'essais
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 3
5 General requirements . 4
5.1 Temperature and humidity . 4
5.2 Rate of load application . 4
5.3 Calibration . 4
5.4 Test report . 4
6 Sampling and storage of specimens . 5
6.1 Sampling . 5
6.2 Selection. 6
6.3 Felling, marking and sample preparation . 6
6.4 Despatch . 6
6.5 Receipt and storage of the bamboo culms . 6
6.6 Marking and conversion into test specimens . 6
7 Moisture content . 7
7.1 Moisture content by oven-dry method. 7
7.1.1 Apparatus . 7
7.1.2 Preparation of test pieces. 7
7.1.3 Procedure . 7
7.1.4 Calculation and expression of results . 7
7.2 Moisture content by electrical moisture meter method . 7
7.2.1 General. 7
7.2.2 Apparatus . 8
7.2.3 Procedure . 8
7.2.4 Calculation and expression of results . 8
7.2.5 Test report . 8
8 Density . 8
8.1 General . 8
8.2 Apparatus . 8
8.3 Preparation of test pieces . 9
8.4 Procedure . 9
8.5 Calculations and expressions of results . 9
8.6 Test report .10
9 Mass per unit length .10
9.1 General .10
9.2 Apparatus .10
9.3 Preparation of test pieces .10
9.4 Procedure .10
9.5 Calculations and expressions of results .10
10 Compression strength and stiffness parallel to the fibres .11
10.1 Apparatus .11
10.2 Preparation of tests specimens .12
10.3 Procedure .12
10.4 Calculation and expression of results.13
10.5 Test report .13
11 Tension strength and stiffness parallel to the fibres .13
11.1 Apparatus .13
11.2 Preparation of test specimens .13
11.3 Procedure .14
11.4 Calculation and expression of results.15
11.5 Test report .15
12 Bending strength and stiffness parallel to the fibres .15
12.1 General .15
12.2 Apparatus .15
12.3 Preparation of test culms. .16
12.4 Procedure .16
12.5 Calculation and expression of results.17
12.6 Test report .17
13 Shear strength parallel to fibres .18
13.1 Apparatus .18
13.2 Preparation of test specimens .18
13.3 Procedure .19
13.4 Calculation and expression of results.19
13.5 Test report .19
14 Tension strength perpendicular to the fibres .19
14.1 Apparatus .19
14.2 Preparation of tests specimens .
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