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GB/T 29902-2013: Standard method of evaluating wood preservatives in a soil bed
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GB/T 29902-2013: Standard method of evaluating wood preservatives in a soil bed

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Standard method of evaluating wood preservatives in a soil bed ICS 71.100.50 B71 National Standards of People's Republic of China Test methods for wood preservatives soil bed PERFORMANCE EVALUATION 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, Chinese Academy of Forestry Wood Industry Research Institute, Guangdong Provincial Quality Supervision Forest Products Inspection Station, the State Forestry Administration Forest Products Quality Inspection and Testing Center (Guangzhou). The main drafters of this standard. Su Haitao, He Xuexiang, Maxing Xia, Zhang Yanjun, Xiegui Jun, Chen Lifang, Jiang Mingliang, Ma Hongxia, Li Xingwei, Habitat Xie language. Test methods for wood preservatives soil bed PERFORMANCE EVALUATION

1 Scope

This standard specifies the rapid assessment of wood preservatives antimicrobial laboratory soil test method for degradation of bed. This standard applies to all kinds of wood preservatives.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 13942.2 durability of wood - Part 2. Test methods for natural durability Field GB/T 14019 wood preservative term GB/T 23229-type water-borne wood preservatives Analysis NY/T 52 soil moisture determination

3 Terms and Definitions

GB/T 14019 and defined by the following terms and definitions apply to this document. 3.1 Soil moisture soilhumidity Soil moisture content a certain depth of soil. 3.2 Soil bed soilbed Proving ground for laying wood specimens, made of plastic, cement square, stainless steel or similar inert material composed of Koike ruled. 3.3 Soil bed room soilbedchamber Place soil bed room or enclosed space.

4 bed soil test site

4.1 soil bed Each sub-grid soil bed should spread into a certain depth of sand, usually from the bottom gravel layer thickness of 150mm and 450mm deep top soil Soil layer. 4.2 soil bed room Soil bed should be built indoor and outdoor drains. Soil bed room ambient temperature should be maintained at 25 ℃ ~ 30 ℃, relative humidity of 75% or more. phase Humidity should be maintained at the soil surface can be prevented from drying degree. 4.3 Soil requirements Soil soil bed should be collected from the forest topsoil, with some humus, keep it fresh, and after a 4-mesh screening over screening ...