Search result: GB/T 29901-2013
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Test method for water-repellency efficiency of water repellent
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GB/T 29901-2013
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| Standard ID | GB/T 29901-2013 (GB/T29901-2013) | | Description (Translated English) | Test method for water-repellency efficiency of water repellent | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B71 | | Classification of International Standard | 91.120.30 | | Word Count Estimation | 5,590 | | 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 vacuum pressure treated wood waterproofing agent efficiency test method for waterproofing. This standard applies to the mixture with water repellent wood preservative. |
GB/T 29901-2013
Test method for water-repellency efficiency of water repellent
ICS 91.120.30
B71
National Standards of People's Republic of China
Water efficiency test method for wood waterproofing agent
Issued on. 2013-11-12
2014-04-11 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard was proposed by the State Forestry Administration.
This standard by the National Standardization Technical Committee timber (SAC/TC41) centralized.
This standard was drafted. Guangdong Provincial Academy of Forestry Sciences, Guangdong Provincial Forest Products Quality Supervision, Inspection Station, the State Forestry Administration Forest Products Quality
Inspection and Testing Center (Guangzhou), Shanghai different Wood Technology Co., Ltd.
The main drafters of this standard. Chen Lifang, Zhang Yanjun, Xiegui Jun, Su Haitao, Ma Hongxia, what Xuexiang, Li Xingwei, ranking Xie language, Huiming.
Water efficiency test method for wood waterproofing agent
1 Scope
This standard specifies the vacuum pressure-treated wood waterproofing agent waterproof efficiency test method is used.
This standard applies to wood waterproofing agent or a mixture of wood waterproofing agent and preservative.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1
Waterproof efficiency water-repelencyefficiency
Tangential line of wet wood waterproofing inflation rate around the rate of change.
3 Materials
Wood samples. from smooth surface texture, straight pine genus (eg. massoniana) sheet material, randomly selected three panels, each panel saw from
Sapwood take two samples, one of which for water treatment, the other as a control sample. Knots, cracks, rot and other defects should not be present sample.
Sample size is 6.0mm (axial) × 25mm (radial) × 50mm (tangential).
Sample value should be taken to ≥1.52mm swelling in the string before the treatment.
4 Device
4.1 climatic chamber (chamber)
Available temperature (20 ± 2) ℃, relative humidity of (65 ± 5)% constant environment.
4.2 Analytical Balance
Accuracy of 0.01g.
4.3 Test Gauge
Accuracy of 0.02mm.
4.4 Vacuum pressure treatment device
Pressure. ≥0.8MPa, degree of vacuum. ≤-0.08MPa.
5 test procedure
5.1 Processing
5.1.1 Sample equilibrium moisture content adjustment
Chapter 3 wood sample obtained at a temperature (20 ± 2) ℃, relative humidity (65 ± 5)% of humidity chamber (room) humidity control is carried out
Processing to constant weight, weighing records.
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