GB/T 29901-2013 English PDF

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GB/T 29901-2013: Test method for water-repellency efficiency of water repellent
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 29901-2013	149	Add to Cart	3 days	Test method for water-repellency efficiency of water repellent	Valid

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Basic data

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: 5,511
Regulation (derived from): National Standards Bulletin No. 22 of 2013
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

---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.
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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