Значение и использование

This test method is useful in the development of new wood preservatives and preservative systems by evaluating the minimum preservative retention to prevent decay under laboratory conditions. The results are used to facilitate target retentions in subsequent tests for effectiveness against termites (see Test Method D 3345) and in field stakes (see Test Method D 1758). The sections on Treatment and Preservative Permanence are referenced by other ASTM standards. The test method assumes that the test blocks exposed to certain conditions after treatment will achieve equilibrium, and will return to the same equilibrium after exposure to fungi. This assumption may lead to weight loss that is not due to decay. The test uses live cultures of fungal organisms that require careful colonization, storage, and feeding to remain viable strains.

Область применения

1.1 This test method covers determination of the minimum amount of preservative that prevents decay of selected species of wood by selected fungi under optimum laboratory conditions.

1.2 The requirements for preparation of the material for testing and the test procedure appear in the following order:

Section TitleSectionSummary of Test Method3Significance and Use4Apparatus5Reagents6Wood and Test Blocks7Test Fungi8Culture Media9Preparation of Test Cultures10Preparation and Impregnation of Test Blocks11Conditioning Treated Blocks12Preservative Permanence: Weathering Procedure13Stabilization of Treated Test Blocks and Placement in Culture Bottles14Incubation and Duration of Test15Handling Test Blocks After Exposure to Test Fungi16Calculation of Weight Losses17Evaluation of Test Results18Refining the Threshold19Report20Precision and Bias21Keywords22

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.