GB/T 23561.2-2009 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 23561.2-2009: Methods for determining the physical and mechanical properties of coal and rock -- Part 2: Methods for determining the true density of coal and rock Status: Valid
Basic dataStandard ID: GB/T 23561.2-2009 (GB/T23561.2-2009)Description (Translated English): Methods for determining the physical and mechanical properties of coal and rock -- Part 2: Methods for determining the true density of coal and rock Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: D04 Classification of International Standard: 73.010 Word Count Estimation: 12,142 Date of Issue: 2009-04-08 Date of Implementation: 2009-12-01 Regulation (derived from): National Standard Approval Announcement 2009 No.5 (Total No.145) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the terms and definitions for determining the density of coal and rock really involved, instruments and equipment, test procedures and data calculation pycnometer method. True density of coal or rock analyzer used in this part of the true density pycnometer method or gas expansion method. GB/T 23561.2-2009: Methods for determining the physical and mechanical properties of coal and rock -- Part 2: Methods for determining the true density of coal and rock---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. National Standards of People's Republic of China GB/T 23561.2-2009 Methods for determination of physical and mechanical properties of coal and rock Part 2.Methods for determination of true density of coal and rock General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Issued by the Standardization Administration of China forewordGB/T 23561 "Methods for Determination of Physical and Mechanical Properties of Coal and Rock" is released by parts and is divided into 16 parts. --- Part 1.General provisions on sampling; --- Part 2.Determination of true density of coal and rock; --- Part 3.Determination method of coal and rock block density; --- Part 4.Calculation method of coal and rock porosity; --- Part 5.Determination of water absorption of coal and rock; --- Part 6.Coal and rock moisture content determination method; --- Part 7.Determination of uniaxial compressive strength and calculation method of softening coefficient; --- Part 8.Determination methods of coal and rock deformation parameters; --- Part 9.Coal and rock triaxial strength and deformation parameters determination method; --- Part 10.Determination of tensile strength of coal and rock; --- Part 11.Coal and rock shear test methods; --- Part 12.Determination method of coal firmness coefficient; --- Part 13.Determination method of coal and rock point load strength; --- Part 14.Method for determination of rock expansion rate; --- Part 15.Determination method of rock expansion stress; --- Part 16.Determination method of rock disintegration resistance index. This Part is Part 2 of GB/T 23561. Appendix C and Appendix D of this section are normative appendices, while Appendix A and Appendix B are informative appendices. This part is proposed and managed by China Coal Industry Association. This part is drafted by. Coal Research Institute Mining Design Research Branch and Coal Research Institute Detection Research Branch. The main drafters of this section. Qi Qingxin, Li Jiqing, Mao Debing, Fu Jingyu. GB/T 23561.2-2009 Methods for determination of physical and mechanical properties of coal and rock Part 2.Methods for determination of true density of coal and rock1 ScopeThis part of GB/T 23561 specifies the terms and definitions involved in the determination of the true density of coal and rock, instruments and equipment, test procedures and Calculation of data by pycnometer method. This part uses the pycnometer method or gas expansion method true density analyzer to measure the true density of coal or rock.2 Terms and DefinitionsThe following terms and definitions apply to this part of GB/T 23561.3 Instruments and equipment3.1 True density analyzer by gas expansion method Accuracy 0.02% (135cm3 large sample cell), 0.03% (50cm3 medium sample cell), 0.03% (10cm3 small sample cell); Repeatability 0.01% (135cm3 large sample cell), 0.015% (50cm3 medium sample cell), 0.015% (10cm3 small sample cell); Resolution 0.0001g/mL. The instrument should be connected to a vacuum pump for in-situ vacuum degassing. 3.2 Instruments and equipment for pycnometer method The main instruments and equipment are as follows. a) rock crushers; b) Porcelain or agate bowls; c) Rock pulverizer, the output particle size is 0.2mm~0.3mm; d) Sampling sieve. aperture 0.2mm or 0.3mm; e) Balance. Sensitivity (minimum division value) 0.001g; f) oven; g) dryer; h) sand or water baths; i) Vacuum pumping device. the degree of vacuum can reach at least 0.001MPa (about 7mmHg); j) Short neck pycnometer. with ground capillary stopper, capacity 100mL or 50mL; k) Pipette. capacity 10mL (graduated cylinder); l) magnets; m) Thermostat. capable of maintaining a constant temperature of (20±0.5)°C; n) Thermometer. range (0-50) °C, minimum division value 0.2 °C. 3.3 Reagents Sodium dodecylbenzenesulfonate (C18H29NaSO3), analytically pure, 2% aqueous solution. Or sodium lauryl sulfate (C12H25NaSO4), chemically pure, 2% aqueous solution.4 Test steps4.1 Pycnometer method 4.1.1 Sample preparation For magnetic rocks, take about 100g of representative rock samples, crush them with a porcelain bowl or agate bowl, and let them all pass through a hole with a diameter of 0.2mm. Or 0.3mm sampling sieve. For non-magnetic rock or coal, take a representative sample of about 300g, crush it into small pieces with a pulverizer, and then grind it into a powder with a grinder. Powder, and make it all pass through the aperture 0.2mm or 0.3mm sampling sieve. Use a magnet to absorb the iron filings mixed in the rock powder. The prepared rock samples were dried at 105°C to 110°C for 24 hours, then taken out and cooled to room temperature in a desiccator. 4.1.2 Rock sample test steps 4.1.2.1 Boil distilled water and cool to room temperature. 4.1.2.2 Take a 100mL pycnometer whose neck matches the cork, wash it with distilled water, fill in one-third of the distilled water, and dry the outside of the bottle. surface. 4.1.2.3 Divide into quarters and weigh 15g of sample powder (accurate to 0.001g), and carefully pour it into one-third of the distilled In the pycnometer of water, be careful not to let the powder spill or stick to the neck of the bottle. Note. If a 50mL pycnometer is used, weigh 10g of rock powder. 4.1.2.4 Put the pycnometer filled with distilled water and rock powder on a sand bath or water bath to boil, then continue to boil for 1h to 1.5h. 4.1.2.5 During the boiling process, the sample powder should be fully boiled without splashing or overflowing the sample powder. 4.1.2.6 For the sample powder splashed on the bottle wall, use the burette to pour water along the bottle wall to wash it down. 4.1.2.7 If the vacuum pumping method is used, put the above-mentioned pycnometer into the vacuum pumping device. The vacuum degree of pumping is 0.001MPa (approx. 7mmHg). Start the vacuum pump to pump air until no air bubbles occur in the bottle, and the pumping time is not less than 1h. Then put in by the three-way switch Air. The following steps are the same as the sand bath cooking method. 4.1.2.8 For rocks containing water-soluble minerals, kerosene should be used instead of distilled water for determination. In this case, vacuum pumping method can only be used, and The method of boiling in a sand bath cannot be used. See Appendix A for the calculation method of kerosene density. 4.1.2.9 Naturally cool the boiled pycnometer to room temperature, and then inject distilled water so that the liquid level is just in contact with the cork, and be careful not to leave any bubble. Dry the outer surface of the bottle, and weigh it on a balance to obtain M1 (if the pycnometer has a scale line, the meniscus line of the liquid surface should be flush with the scale line). 4.1.2.10 Calibrate the pycnometer, see Appendix B, weigh the hydration bottle to obtain M2, accurate to 0.001g. 4.1.3 Coal sample test procedure 4.1.3.1 Accurately weigh 2g (accurate to ±0.001g) of pulverized coal analysis sample with a particle size of less than 0.2mm, and carefully weigh all of them through a small neckless funnel. into the pycnometer. 4.1.3.2 Use a graduated cylinder to inject 3mL of sodium dodecylbenzenesulfonate or sodium dodecyl sulfate solution with a concentration of 2% into the pycnometer, and note Wash the coal particles attached to the bottle wall into the bottle, turn the pycnometer lightly, and place it for 15 minutes to make the sample soak. Then add 25mL along the bottle wall distilled water. 4.1.3.3 Move the pycnometer to a water bath or a sand bath and boil for 20 minutes to remove the adsorbed gas. 4.1.3.4 Take out the pycnometer, add newly boiled distilled water until the water level is about 1cm lower than the mouth of the bottle, and cool to room temperature. then put in (20±0.5)°C or slightly lower than room temperature in a thermostat, keep the temperature for 1h (it can also be placed at room temperature for more than 3h. For example, use sodium lauryl sulfate solution overnight), and record the room temperature. 4.1.3.5 Use a straw to add boiled distilled water at 20°C or room temperature to the mouth of the bottle along the neck of the bottle, cover the bottle stopper, and let the excess water flow from the capillary on the bottle stopper. The tube overflows (at this time, there should be no air bubbles in the bottle and capillary, otherwise water should be refilled to cover the cork). 4.1.3.6 Dry the pycnometer quickly, and immediately weigh the mass of the pycnometer plus coal powder sample plus lubricant plus water. 4.2 Gas expansion method True density analyzer method 4.2.1 Sample preparation. see 4.1.1. 4.2.2 Calibration of the instrument. put in the standard ball matched with the instrument, and complete the calibration according to the steps prompted by the instrument. This calibration is required every day after power-on Do it once, and a recheck should be done after 25 samples. 4.2.3 Weigh the mass of the sample. the sample volume can be taken between 1cm3 and 135cm3.If the sample size is not limited, take as much as possible. According to sample Select the sample cell according to the analysis amount of the product, weigh the sample cell with an electronic balance, and then add the particle sample to 2/3 of the volume of the sample cell, and weigh to an accuracy of 2/3. 0.001g, put the sample cell together with the sample into the true density analyzer, and input the accurate mass of the weighed sample into the true density analyzer. 4.2.4 Accuracy setting. The instrument can automatically repeat the operation until the selected multiple measured values reach the allowable accuracy selected by the user. 4.2.5 Equilibrium time. automatic selection or pressure selected by the user. 4.2.6 Degassing. use pulse purge degassing or in-situ vacuum degassing. 4.2.7 Input high-purity helium or nitrogen. use gas expansion displacement technology to directly measure the true volume of the powder sample. 4.2.8 Printing results. connect to the computer, and print the test results and related parameters.5 Calculation of data by pycnometer methodThe data of the pycnometer method is calculated according to formula (1). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 23561.2-2009_English be delivered?Answer: Upon your order, we will start to translate GB/T 23561.2-2009_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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