NB/SH/T 0890-2014 Test method for recovery of emulsified asphalt residue by low-temperature evaporation

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

• Standard number: NB/SH/T 0890—2014
• Chinese name: Test method for recovery of emulsified asphalt residue by low-temperature evaporation
• English name: Standard Practice for recovering residue from emulsified asphalt using low temperature evaporative technique
• Replacement relationship: first publication (original text: this standard is first published)
• Adoption relationship: modified adoption by redrafting method of ASTM D7497-09 Standard Practice for Recovery of Emulsified Asphalt Residue Using Low-Temperature Evaporation Technique (English version)
• Editorial modifications compared with ASTM D7497-09: the table 1 of ASTM D7497-09 is taken as Appendix A (informative appendix); the 1.1 example reference D977 and D2397 of ASTM D7497-09 are deleted (requires confirmation against the source standard (source-text extraction): the original text is “1.1 example reference”, suspected to be “1.1 reference”)
• Main technical changes compared with ASTM D7497-09: delete the referenced documents ASTM D977, ASTM D2397, NF EN13074; replace ASTM D6934 with SH/T 0099.4 (MOD); replace ASTM D6997 with SH/T 0099.17 (MOD); add GB/T 11147; delete the note of 4.1, adopt a circular silicone rubber dish and specify specific dimensions; list the balance, level gauge, and tray as independent clauses in Chapter 4 (requires confirmation against the source standard (source-text extraction): the original text says “Chapter 4”, but the apparatus and materials in the main text are Chapter 5); add a sampling chapter; add a sample preparation chapter; add a calculation and report chapter
• Publication/implementation: published on 2014-06-29, implemented on 2014-11-01
• Issuing unit: National Energy Administration
• Drafting unit: Heavy Oil Research Institute, China University of Petroleum (East China); participating drafting unit: Shengli Refinery of Qilu Branch, China Petroleum & Chemical Corporation
• Main drafters: Liu Guoxiang, Zhang Xiaoying, Chen Heling

2. Scope of application and non-applicability

• Applicable to the recovery of emulsified asphalt residue using low-temperature evaporation technology.
• The experimental conditions are similar to road evaporation conditions, and the recovered residue can be used for the required further tests.
• This standard adopts the SI system.
• Not applicable: not provided in the available source.

3. Method principle

A certain amount of emulsified asphalt sample is evaporated in a container made of a material that does not adhere to asphalt in a forced-air oven at 25°C for 24h, then transferred to a forced-air oven at 60°C to continue evaporating for 24h.

4. Reagents and materials (purity / preparation)

• Silicone rubber dish: circular, radius 113 mm, wall thickness 2 mm, depth 8 mm. Any silicone rubber dish or other container made of a material that does not adhere to asphalt that satisfies an emulsified asphalt coating rate of 1.5 kg/m²~2.0 kg/m² may also be used.
• Spatula: a palette knife or a knife made of other suitable material, used for applying the emulsified asphalt.
• Tray: the bottom of the tray is flat, with sufficient area and strength, used to support the silicone rubber dish, and its size should be suitable for easy entry into and exit from the oven.
• Reagents: not provided in the available source.

5. Apparatus and equipment

• Forced-air oven: capable of maintaining oven temperatures of 25±2°C and 60±2°C (the oven temperature settings and tolerances are unclear in the source transcription and remain unverified). There is a rack inside the oven, and the rack is at least 10cm from the top and bottom of the oven respectively; when samples are placed on the rack, the spacing between racks is at least 4cm. The rack must be leveled using a bubble level with a length of at least 250mm.
• Balance: sensitivity not greater than 0.1g.
• Level gauge: glass long bubble type, length not less than 250mm. Other level gauges that meet the requirements may also be used.
• Tray: see the materials in Section 4 (the original text lists it in Chapter 5 5.6).

6. Recommended operating conditions

• First-stage evaporation temperature: 25±2°C, time 24h±1h.
• Second-stage evaporation temperature: 60±2°C, time 24h±1h.
• Cooling: cool under laboratory ambient conditions for 1h.
• Coating rate: about 1.5 kg/m²~2.0 kg/m².
• Weighing accuracy: weigh to the nearest 0.1g.

7. Sampling and sample preparation

• Sampling: carry out in accordance with GB/T 11147.
• Sample preparation:
  • For emulsified asphalt samples with a 50°C viscosity index requirement, they must be heated in the original sample container in a water bath or oven at not higher than 60°C to 50°C±3°C, and after the sample temperature reaches 50°C±3°C, stir evenly;
  • For emulsified asphalt samples with a 25°C viscosity index requirement, they must be mixed or stirred evenly in the original sample container at 25°C±3°C.

8. Analytical procedure

• 8.1 Place the tray and silicone dish on the balance and weigh, weigh to the nearest 0.1g, record the mass of the tray and silicone rubber dish, denoted as P₀;
• 8.2 Pour the required amount of emulsified asphalt sample into the silicone rubber dish, and spread it evenly with a spatula to form an emulsified asphalt film with a coating rate of about 1.5 kg/m²~2.0 kg/m²; weigh the mass of the tray, silicone rubber dish, and emulsified asphalt sample, weigh to the nearest 0.1g, record the mass of the tray, silicone rubber dish, and emulsified asphalt sample, denoted as P₁. The amount of emulsified asphalt sample required for different coating rates may refer to Appendix A.
• 8.3 Place the tray together with the silicone rubber dish containing the emulsified asphalt sample into a forced-air oven already kept at constant temperature of 25±2°C, and maintain for 24h±1h;
• 8.4 Remove the tray and the silicone rubber dish containing the emulsified asphalt sample from the 25±2°C oven, transfer them together into a forced-air oven already kept at constant temperature of 60±2°C, and maintain for 24h±1h;
• 8.5 Remove the tray and the silicone rubber dish containing the emulsified asphalt evaporation residue from the oven, cool under laboratory ambient conditions for 1h; weigh the mass of the tray, silicone rubber dish, and emulsified asphalt evaporation residue, weigh to the nearest 0.1g, record the mass of the tray, silicone rubber dish, and emulsified asphalt evaporation residue, denoted as P₂.
• 8.6 Use a wooden or plastic implement to carefully peel the emulsified asphalt evaporation residue off the silicone rubber dish, avoiding damage to the silicone rubber dish. Note to wear suitable gloves to prevent the emulsified asphalt evaporation residue from contacting the skin.

9. Qualitative and quantitative determination and calculation formula

• The emulsified asphalt evaporation residue content is expressed as a mass percentage. The calculation formula is as shown in formula (1).

R = (P₂ - P₀) / (P₁ - P₀) × 100%

Where:

• R—— emulsified asphalt evaporation residue content, %;
• P₂——the sum of the masses of the tray, silicone rubber dish, and emulsified asphalt evaporation residue, in grams (g);
• P₀——the sum of the masses of the tray and silicone rubber dish, in grams (g);
• P₁——the sum of the masses of the tray, silicone rubber dish, and emulsified asphalt sample, in grams (g).

(requires confirmation against the source standard (source-text extraction): the original formula layout is “22-2×100%. R=P，-P。”, restored according to context and symbol definitions)

10. Precision

Not provided in the available source.

11. Report

The report includes the following information:

• a) sample identification;
• b) standard used;
• c) mass fraction of evaporation residue;
• d) test date.

12. Referenced documents

• GB/T 11147 Asphalt sampling method
• SH/T 0099.4 Determination method for evaporation residue content of emulsified asphalt
• SH/T 0099.17 Distillation determination method for residue and distillate oil content of emulsified 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 Q&A reference