SH/T 0637-1996 Determination of Adhesion Rate of Petroleum Asphalt

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full name / English name / replacement relationship

• Method number: SH/T 0637-1996
• Chinese full name: Determination of Adhesion Rate of Petroleum Asphalt
• English name: not provided in the available source
• Replacement relationship: This standard, from the date of entry into force, replaces the Determination of Adhesion Rate in SH/T 0423-92 Test Methods for Insulating Adhesive, Appendix B Determination of Adhesion Rate in SH 0001-90 Cable Asphalt, Appendix A Determination of Asphalt Adhesion Rate in SH 0098-91 Pipeline Anti-corrosion Asphalt, and other methods for determining adhesion rate.
• Drafting unit: Dushanzi Refinery is responsible for drafting; proposed by Dushanzi Refinery; technical coordination by Petroleum University.
• Main drafters: Meng Shufang, Shen Guoxi.
• Approval/implementation: approved by China Petrochemical Corporation 1996-05-24, implemented on 1996-12-01.

2. Scope of application and non-applicability

• Scope of application: This standard specifies the method for determining the adhesion rate of petroleum asphalt; it is applicable to the determination of petroleum asphalt with a softening point above 70℃.
• Not applicable: not provided in the available source.

3. Method principle

After the specimen loaded between the mold cylinder and the template is kept at the specified temperature for 1h, it is pulled apart with a tensile machine. After breaking, the coverage rate of the specimen on the template is the adhesion rate, expressed as a percentage.

4. Reagents and materials (purity / preparation)

• 3.1 190 solvent naphtha or straight-run gasoline.
• 3.2 Absorbent cotton.
• Purity and specific preparation: not provided in the available source.

5. Instruments and equipment

• 4.1 Mold: see Figure 1 (the original Figure 1 is the adhesion rate mold, unit: mm; labels: 1— pull ring; 2— mold cover; 3— mold cylinder; 4— template).
• 4.2 Tensile machine: tensile force not less than (source-text extraction doubtful point, original text reads "MOON"), pulling speed 100～500mm/min (source-text extraction doubtful point, original text reads "100[unreadable separator]500mm/tnino"). Requires confirmation against the source standard (source-text extraction).
• 4.3 Oven: capable of maintaining 100～110℃.
• 4.4 Water bath: capacity not less than 2L.
• 4.5 Thermometer: -30～60℃ (source-text extraction doubtful point, original text reads "[unreadable sign]30[unreadable separator]6090"), graduation 1℃ (source-text extraction doubtful point, original text reads "graduation 19c"). Requires confirmation against the source standard (source-text extraction).
• 4.6 Electric furnace or other heater.

6. Recommended operating conditions

• Oven temperature: 100～110℃.
• Water bath (or ice-water bath) temperature: according to the temperature required by the product technical conditions, maintain for ±1℃, keep constant temperature for 1h.
• Tensile machine pulling speed: 100～500mm/min (requires confirmation against the source standard (source-text extraction)).
• Melting temperature: not exceeding 100℃ of the estimated softening point (original wording as such, requires confirmation against the source standard (source-text extraction)).
• Melting time: not exceeding 30min.

7. Sampling and specimen preparation

• 5.1 Clean the template and mold cylinder with solvent naphtha, wipe dry, and place in an oven at 100～110℃ for 15～30min.
• 5.2 Melt the specimen; the melting temperature shall not exceed 100℃ of the estimated softening point (requires confirmation against the source standard (source-text extraction)), and the melting time shall not exceed 30min. Stir continuously during heating to prevent local overheating.
• 5.3 Take the mold cylinder and template out of the oven, place the end of the mold cylinder on the template, then fill the mold cylinder with the melted specimen, and allow to cool naturally at room temperature for 1～1.5h.

8. Analysis procedure

• 6.1 Screw the mold cover onto the mold cylinder containing the specimen, place it in the middle part of a water bath (or ice-water bath) at the temperature required by the product technical conditions, maintain for ±1℃, keep constant temperature for 1h.
• 6.2 Take out the specimen, immediately screw on the pull ring, pull the specimen apart at a uniform speed with a tensile machine within 2min, remove the template, and visually inspect the area of the asphalt specimen not bonded on the template.

9. Qualitative and quantitative determination and calculation formula

The adhesion rate of petroleum asphalt X(%) is calculated according to the following formula:

X = (A / S) × 100

Where:

• A—— the area of the specimen not bonded on the template, mm²;
• S—— the area of the specimen when fully bonded on the template, taken in this test as 500 (original text reads "500. '.", the unit is suspected to be mm², requires confirmation against the source standard (source-text extraction)).

10. Precision

Repeatability: the difference between two results of repeated determinations by the same operator on the same specimen shall not be greater than 5%.

11. Report

Take the arithmetic mean of two repeated determination results as the determination result.

12. Referenced documents

• SH/T 0423-92 Determination of Adhesion Rate in Test Methods for Insulating Adhesive
• SH 0001-90 Appendix B Determination of Adhesion Rate in Cable Asphalt
• SH 0098-91 Appendix A Determination of Asphalt Adhesion Rate in Pipeline Anti-corrosion Asphalt

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick reference Q&A