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GB/T 1934.1-2009: Method for determination of the water absorption of wood
Status: Obsolete GB/T 1934.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 1934.1-2009 | English | 279 |
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Method for determination of the water absorption of wood
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GB/T 1934.1-2009
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| GB/T 1934.1-1991 | English | 199 |
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Method for determination of the water absorption of wood
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GB/T 1934.1-1991
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| GB 1934-1980 | English | RFQ |
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Determination of wood water absorption and swelling
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GB 1934-1980
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PDF similar to GB/T 1934.1-2009
Basic data | Standard ID | GB/T 1934.1-2009 (GB/T1934.1-2009) | | Description (Translated English) | Method for determination of the water absorption of wood | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B60 | | Classification of International Standard | 79.020 | | Word Count Estimation | 6,617 | | Date of Issue | 2009-02-23 | | Date of Implementation | 2009-08-01 | | Older Standard (superseded by this standard) | GB/T 1934.1-1991 | | Quoted Standard | GB/T 1928-2009; GB/T 1929-2009; GB/T 1931-2009 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.3 (Total No.143) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the determination of water absorption of the test timber equipment, specimens, test procedures and results of calculations. This section applies to a small sample timber unblemished water absorption. | GB/T 1934.1-2009: Method for determination of the water absorption of wood---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Method for determination of the water absorption of wood
ICS 79.020
B60
National Standards of People's Republic of China
Replacing GB/T 1934.1-1991
Determination of water absorption of wood
Posted 2009-02-23
2009-08-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 1934 is divided into two parts.
--- Determination of water absorption of wood;
--- Wood Swelling of the measurement method.
This section GB/T 1934.1 "Determination of water absorption of wood."
This Part replaces GB/T 1934.1-1991 "Determination of water absorption of wood."
This section compared with the GB/T 1934.1-1991 main changes are as follows.
--- Principle revised as follows. "Wood is absorbent wood or water to saturation within the time prescribed quality water points, and the whole
Dry wood mass ratio represented ";
--- Remove 5.3 "allows the use of all-dry density was measured after the sample";
--- Increased flooding of the sample requirements of the 6.2 revised as follows. "The sample was pushed below the surface at least 50mm,";
--- Soaking time of 6.3 has been modified.
Appendix A of this part is a normative appendix.
This part by the State Forestry Administration.
This part of the National Standardization Technical Committee centralized timber.
This section is responsible for drafting units. China Forestry Science Institute of Wood Industry.
This section participated in the drafting unit. China Forestry Research Institute of Forestry Institute for New Technologies, Northeast Forestry University.
The main drafters of this section. ke Zhao, Huang Rongfeng, Lv Jianxiong, Zhaorong Jun, Fei Hua present, Yuhua Jiang, Huang Anmin, Liu Yingtao.
This section was first released in 1980, the first revision in 1991, this is the second revision.
This part of the National Standardization Technical Committee responsible for the interpretation of wood.
Determination of water absorption of wood
1 Scope
GB/T 1934 This section specifies the determination of the water-absorbent wood test equipment, samples, test procedures and results of calculations.
This section applies to a small wood unblemished specimens measured water absorption.
2 Normative references
The following documents contain provisions which, through reference to GB/T 1934 to the present, constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 1928-2009 physical and mechanical test methods - General
GB/T 1929-2009 physical and mechanical test materials and test specimens sawing method
GB/T 1931-2009 Method for determination of moisture content of wood
Principle 3
Wood is a porous organic material, with its ability to absorb moisture around. Wood is absorbent wood or water to saturation in Regulation
The sub-quality water, and the whole mass of dry wood expressed as a ratio within a given time.
4 Test Equipment
4.1 container impregnated sample.
4.2 GB/T 1931-2009 test equipment specified in Chapter 3.
5 Sample
5.1 test material sawing and test specimens were according to GB/T 1929-2009 the provisions of Chapter 3.
5.2 Sample size is 20mm × 20mm × 20mm. Requirements and test specimens were made according to GB/T 1928-2009 the provisions of Chapter 3
get on.
6 Test procedure
6.1 The sample was placed in an oven starting temperature 60 ℃ for about 4h, then press GB/T 1931-2009 of 5.2 to 5.4 for drying
And weigh (m1 0).
6.2 sample weighed, then placed in a container filled with distilled water inside, with a stainless steel wire mesh, pressed into the sample surface at least 50mm, cover
Good container. The water temperature should be maintained within the range of (20 ± 2) ℃ for.
6.3 sample into the water for the first time after 6h weigh (m1), 1,2,4,8 days and nights later by weighing each time, until the moisture content of the last two
When the difference is less than 5%, it can be considered to achieve maximum absorption. After soaking for 8 days and nights water content has not yet reached the required sample, according to
Trend 7 results in water absorption curve calculation to determine the appropriate time interval measurements.
Each time weighing, the samples were removed applications absorbent paper to absorb surface moisture from the container and then weighed. Distilled water should be kept within the container
Clean, usually every 4 to 5 days and nights replacement.
7 Results Calculation
(1) shall be calculated absorption type 7.1 specimen to the nearest 1%.
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