SH/T 0779-2005 Saybolt viscosity test method for emulsified asphalt

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Card type: Test method

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

• Standard number: SH/T 0779—2005
• Chinese full name: Saybolt viscosity test method for emulsified asphalt
• English name: Determination of Saybolt viscosity of emulsified asphalt
• Replacement relationship: This standard is first published (not provided in the available source regarding replacement of other standards)
• Adoption relationship: Modified adoption of ASTM D 244-00 "Test Methods for Emulsified Asphalt" Chapter 29 to Chapter 33 "Saybolt Viscosity Test Method for Emulsified Asphalt" (English version), and redrafted according to ASTM D 244-00 Chapter 29 to Chapter 33
• Main differences from ASTM D 244-00 Chapter 29 to Chapter 33 (listed in the original):
  • The layout format of ASTM was modified to conform to the layout format of our country's standards, and editorial modifications were made to the language and wording;
  • The sieve with aperture 850μm was changed to a sieve with aperture 1.18mm;
  • All non-SI units were changed to SI units;
  • The 118mL volumetric flask was changed to a 200mL volumetric flask, and the 400mL volumetric flask was changed to a 500mL volumetric flask;
  • This standard uses thermometers with temperature measurement ranges of 0℃ to 30℃, 0℃ to 50℃, and a scale division of 0.1℃.
• Publication/implementation: published on 2005-11-28, implemented on 2006-06-01
• Issuing authority: National Development and Reform Commission of the People's Republic of China
• Technical administration: Technical administration by the Heavy Oil Research Institute of China University of Petroleum (East China)
• Proposal: Proposed by China Petrochemical Corporation
• Drafting organization responsible: Shengli Refinery of Qilu Branch of Sinopec Corp.
• Main drafters: Jiang Haihua, Liu Huimin, Yao Dehong, Pei Jianche

2. Scope of application and non-applicability

• 1.1 This standard specifies the method for determining the viscosity of emulsified asphalt using a Saybolt-Furol viscometer.
• 1.2 This standard applies to emulsified asphalt with an outflow time of not less than 20s; the standard test temperatures for emulsified asphalt are 25℃ and 50℃.
• 1.3 This standard does not address safety regulations related to use; users of the standard are responsible for establishing appropriate safety application procedures before use.
• Non-applicability: no explicitly listed non-applicability clauses are provided in the available source (only an outflow time of not less than 20s is used as an applicability condition).

3. Method principle

No independent "principle" chapter is provided in the available source. Based on Chapter 2 "Significance and Use" and Chapter 4 test procedures, it can be summarized as follows: at the specified test temperature (25℃ or 50℃), inject a constant-temperature, sieved emulsified asphalt sample into the sample container up to the mark, remove the cork (or rubber stopper) at the bottom while starting the stopwatch, measure the outflow time required for the sample to flow into the receiving flask up to the 60mL mark, then multiply by the viscometer calibration coefficient to obtain the Saybolt viscosity. Chapter 2 of the original states: viscosity plays an important role in the application of emulsified asphalt and is an important indicator affecting the performance of emulsified asphalt; emulsified asphalt used in highway construction must be fine enough to spray evenly, and must be thick enough not to flow down from the top or slope of the road; for mixing-type emulsified asphalt, viscosity may affect its mixing performance and the film thickness on aggregates; the viscosity of many emulsified asphalts is affected by shear force.

4. Reagents and materials (purity / preparation)

• 3.2 Standard viscosity oil: with a standard outflow time for calibration (s).
• 3.3 Filter sieve: aperture 1.18mm.
• 3.5 Others: water bath, oven, trichloroethylene, lubricating oil, etc.
• 3.1.5 Cork (or rubber stopper): with a pull ring at the bottom.
• Purity and specific preparation methods: not provided in the available source.

5. Apparatus and equipment

• 3.1 Saybolt-Furol viscometer: shape and dimensions as shown in Figure 1, composed of the following parts:
  • 3.1.1 Insulating bath: made of corrosion-resistant metal, cylindrical. There is a vertical circular sample container at the center of the bath cover, water inlet and outlet pipes at the side, and an adjustable electric heater inside the bath to heat the water or oil in the insulating bath; the temperature can be controlled at the test temperature ±0.1℃. The cover has a thermometer support hole. A tripod is installed under the bath, two legs of which are provided with leveling screws.
  • 3.1.2 Sample receiving flask: made of heat-resistant glass, shape and dimensions as shown in Figure 2, capacity 60mL±0.05mL (calibrated mark at 20℃).
  • 3.1.3 Sample container: with a metal cover, diameter 56mm, thickness 7mm, the cover has a hole for inserting a thermometer. Shape and dimensions as shown in Figure 3.
  • 3.1.4 Thermometer: temperature measurement ranges 0℃ to 30℃, 0℃ to 50℃, scale division 0.1℃; temperature measurement ranges 0℃ to 50℃, 0℃ to 100℃, scale division 1℃.
  • 3.1.5 Cork (or rubber stopper): with a pull ring at the bottom.
• 3.4 Stopwatch: scale division 0.1s.
• 3.5 Others: water bath, oven, trichloroethylene, lubricating oil, etc.
• Figure 1 Saybolt viscometer annotations (source-text extraction extraction, contains noise, requires confirmation against the source standard): about 300, about 160, overflow port, thermometer holder, insulating liquid inlet, support, thermometer, insulating liquid outlet, conversion rubber ring, etc.
• Figure 2 Sample receiving flask annotations (source-text extraction extraction, contains noise, requires confirmation against the source standard): outer diameter 40±2, above 3.0, above 2.0, 90±1, mark line, inner diameter 10±1, capacity 60mL±0.05mL, 58±10, outer diameter above 55.
• Figure 3 Sample container annotations (source-text extraction extraction, contains noise, requires confirmation against the source standard): φ55±0.2, φ50±0.2, 32±0.2, φ29, above 30, about 20, 125±3, about φ9, heat-resistant and oil-resistant gasket, M8 P0.75, outflow port, M13, M8 P0.75, M18, 15±0.1, 3±0.30, φ12, φ12, cork, unit is millimeters, 12.25±0.10.

6. Recommended operating conditions

• Standard test temperatures: 25℃ and 50℃ (see 1.2).
• Insulating bath temperature control: test temperature ±0.1℃ (see 3.1.1).
• 25℃ Test constant-temperature conditions: constant temperature in a 25℃ water bath for 30min (see 4.2.2).
• 50℃ Test heating/constant-temperature conditions: place the sample in a 71℃±3℃ water bath or oven and heat to 50℃±3℃; pour about 100mL of sample into a 500mL volumetric flask, immerse the bottom of the volumetric flask vertically in a 71℃±3℃ water bath for about 50mm, stir with a thermometer at a stirring speed of 60r/min, and keep the sample at constant temperature in the water bath to 51℃ to 52℃ (see 4.2.2).
• Sample reaches test temperature: test temperature ±0.1℃, hold for 1min (see 4.2.3).
• Stirring speed: 60r/min (see 4.2.2, 4.2.3).
• Timing accuracy: accurate to 0.1s (see 4.2.4).

7. Sampling and sample preparation

• 4.2.2 25℃ Test: stir the emulsified asphalt sample thoroughly without forming bubbles, then pour about 100mL of sample into a 200mL volumetric flask, place the container in a 25℃ water bath at constant temperature for 30min. Slowly invert the bottle several times to mix the sample without forming bubbles. Immediately sieve the sample through a 1.18mm sieve and inject it into the sample container until the liquid level reaches the mark on the sample container, then cover with the container lid.
• 4.2.2 50℃ Test: place the emulsified asphalt sample in a 71℃±3℃ water bath or oven and heat to 50℃±3℃, stir the sample thoroughly without forming bubbles, then pour about 100mL of sample into a 500mL volumetric flask, immerse the bottom of the volumetric flask vertically in a 71℃±3℃ water bath for about 50mm, stir the emulsified asphalt with a thermometer to make the temperature uniform at a stirring speed of 60r/min without forming bubbles, and keep the sample at constant temperature in the water bath to 51℃ to 52℃. Immediately sieve the sample through a 1.18mm sieve and inject it into the sample container until the liquid level reaches the mark on the sample container, then cover with the container lid.
• Sampling amount and sampling method (such as sampling standard): not provided in the available source.

8. Analytical procedure

• 4.1 Preparation work
  • 4.1.1 Clean and dry the sample container and outflow hole with solvents such as trichloroethylene.
  • 4.1.2 Heat the water or oil in the insulating bath and maintain the specified test temperature.
  • 4.1.3 Calibration of the viscometer: the viscometer calibration period is three years, and calibration shall be carried out according to the period.
• 4.2 Test procedure
  • 4.2.1 Insert the cork (or rubber stopper) tightly into the bottom hole of the sample container to a depth of 6.5mm to 9.5mm; the tightness should be such that the sample does not flow out from the outflow hole, and the cork should also be easy to pull out. Then, place the receiving flask below the outflow hole, with the outflow hole directly facing the center of the receiving flask.
  • 4.2.2 25℃ Test and 50℃ Test (sample preparation and injection into the sample container, see Section 7).
  • 4.2.3 Stir the sample horizontally with the thermometer inserted in the container, but do not touch the sample container; stirring speed 60r/min, no bubbles shall form, bring the sample to the test temperature ±0.1℃, and hold for 1min.
  • 4.2.4 Immediately remove the thermometer and container lid, pull out the cork (or rubber stopper) blocking the bottom of the sample container, and at the same time start the stopwatch to allow the sample to flow into the receiving flask. When the sample reaches the 60mL mark of the receiving flask, stop the stopwatch, record the time, accurate to 0.1s.
  • Note: The Saybolt viscometer is suitable for emulsified asphalt with an outflow time of not less than 20s.

9. Qualitative and quantitative determination and calculation formula

• 5.1 Calculation: The Saybolt viscosity of emulsified asphalt is calculated according to the following formula:
  • Vs = V × F
  • Where:
    • Vs—— Saybolt viscosity of the sample, s;
    • V—— Viscosity measured for the sample, s;
    • F—— Viscometer calibration coefficient.
• Qualitative determination: not provided in the available source.

10. Precision

The reliability of the test results shall be judged according to the following provisions (confidence level of 95%).

• 6.1 The difference between two results of repeated determinations by the same operator shall not exceed the following values of the average:
  • Test temperature 25℃, viscosity 20 to 100s: repeatability 5%
  • Test temperature 50℃, viscosity 75~400s: repeatability 9.6%
• 6.2 The difference between the results of two independent determinations by two laboratories shall not exceed the following value of the average:
  • Test temperature 25℃, viscosity 20~100s: reproducibility 15%
  • Test temperature 50℃, viscosity 75~400s: reproducibility 21%
• Note: In the original text, the values in the "viscosity, s" column of the tables 6.1 and 6.2 are the same (25℃ corresponds to 20–100; 50℃ corresponds to 75–400), the repeatability/reproducibility values are listed respectively in table 6.2, the values in table 6.1 require confirmation against the source standard (source-text extraction).

11. Report

• 5.2 Test report: For the same sample, at least two parallel tests shall be conducted; when the results of the two determinations meet the precision requirements of the repeatability test, their average shall be taken as the test result. When the sample viscosity is below 200s, accurate to 0.1s; above 200s, accurate to 1s.
• Report format, list of report items: not provided in the available source.

12. Normative references

• The main text of the original does not list a "Normative references" section.
• Adopted document: ASTM D 244-00 "Test Methods for Emulsified Asphalt" Chapters 29~33 "Test Method for Saybolt Viscosity of Emulsified Asphalt" (English version).

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