LY/T 3195-2020Quality of bamboo treated with preservatives (English PDF)

4.1 Bamboo moisture content before treatment

The moisture content of the bamboo material should be less than 20% before the preservative treatment; if the boron compound in GB/T 27654 is used as the preservative, There is no special requirement for the moisture content of the bamboo material before antiseptic treatment.

4.2 Preservatives

The anticorrosive treatment of bamboo generally uses water-borne preservatives, which should meet the quality requirements of GB/T 27654.

4.3 Anti-corrosion treatment method

The anticorrosive treatment of bamboo generally adopts vacuum pressure treatment process; if boron compound preservative is used, normal pressure can also be used 理工艺。 Processing.

5.1 Penetration rate

The penetration rate of preservatives should be >=85%.

5.2 Drug loading

The preservative should meet the requirements specified in C1, C2, C3.1, C3.2 and C4.1 in Table 2 of GB/T 27651-2011 (see

Table A.1 in Informative Appendix A).

6.1 Sampling method for penetration rate testing

6.1.1 The sampling should be >=30cm from the end and in the middle of the two bamboo joints, avoiding the cracked part.

6.1.2 Randomly select >=3 samples from each tank of anti-corrosion treatment.

6.2 Detection method of penetration rate

6.2.1 Determination of penetration rate of copper-containing anticorrosive bamboo

0.1g of chrome azurol and 1g of sodium acetate are added to 100ml of distilled water to dissolve the solution as the developer, spray this developer Go to the cross section of the newly sawn bamboo, and the color of the vascular bundles of the medicine penetrated under the stereo microscope or magnifying glass.

Shows dark blue, the vascular bundle does not show color without penetration of the drug. Judging the preservatives in the bamboo according to the proportion of the drug vascular bundle Penetration rate.

6.2.2 Determination of penetration rate of boron-containing anticorrosive bamboo

Mix 10ml hydrochloric acid (concentration 36%) with 80ml ethanol (concentration 95%), and then dilute it to 100ml, add 0.25g curcumin, then add 10g salicylic acid, shake the solution as the developer, spray the developer Go to the cross section of the newly sawn bamboo, and the color of the vascular bundles of the medicine penetrated under the stereo microscope or magnifying glass.

It shows bright red, and the vascular bundle does not show color without penetration of the medicine. Judging the preservatives in the bamboo according to the proportion of the drug vascular bundle Penetration rate.

6.3 Testing method for drug loading of antiseptic bamboo

Sampling is carried out according to method 6.1, and the sample is processed into a powder sample of no less than 30 mesh, and after it is mixed thoroughly, use GB/T 23229-2009 chapter 4 to chapter 9 analysis method. According to the measured value of drug loading, and GB/T 27651-2011 Compare the values specified in Table 2 (see Table A.2 in Informative Appendix A) to determine whether the drug loading of anticorrosive bamboo meets the requirements begging.

Appendix A

(Informative appendix) Use classification of anticorrosive bamboo and its products According to the final use environment and exposure conditions of bamboo and its products, as well as the effect of biodegradation factors under different environmental conditions the degree of harm of bamboo and its products is classified into five categories C1~C5, of which C3 and C4 are further divided into two categories C3.1, C3.2 and C4.1, C4.2 are shown in Table A.1.Anticorrosive bamboo and its products used under various conditions should reach the drug loading