GB/T 176-2017 PDF English
US$625.00 · In stock · Download in 9 secondsGB/T 176-2017: Methods for chemical analysis of cement Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 176: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 176-2017 | English | 625 |
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Methods for chemical analysis of cement
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| GB/T 176-2008 | English | RFQ |
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Methods for chemical analysis of cement
| Obsolete |
| GB/T 176-1996 | English | RFQ |
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Method for chemical analysis of cement
| Obsolete |
| GB 176-1987 | English | 959 |
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Method for chemical analysis of cement
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Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 176-2017
GB/T 176-2017: Methods for chemical analysis of cement---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT176-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
Q 11
Replacing GB/T 176-2008
Methods for chemical analysis of cement
(ISO 29581-1.2009 Cement - Test methods -
Part 1.Analysis by wet chemistry, NEQ)
Issued on. DECEMBER 29, 2017
Implemented on. NOVEMBER 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword... 6
1 Scope... 11
2 Normative references... 11
3 Terms and definitions... 12
4 Basic requirements for test... 13
5 Preparation of specimens... 15
6 Chemical analysis methods... 16
7 X-ray fluorescence analytical methods... 100
8 Inductively coupled plasma emission spectroscopy... 116
Appendix A (Informative) Example for calculation of metering point in
potentiometric titration for chloride ion... 124
Appendix B (Informative) Reference chromatographic conditions and
chromatograms of carbonate eluent... 125
Appendix C (Informative) Recommended wavelength for inductively coupled
plasma emission spectroscopy... 126
1 Scope
This standard specifies methods for chemical analysis of cement, X-ray
fluorescence analysis methods, inductively coupled plasma emission
spectrometry for the determination of loss on ignition (LOI), SO3, insoluble (IR),
SiO2, Fe2O3, Al2O3, CaO, MgO, TiO2, Cl-, K2O, Na2O, S2-, MnO, P2O5, CO2, ZnO,
F-, free calcium oxide (fCaO), SrO. Chemical analysis methods of cement are
further divided into reference methods and alternative methods. If multiple
determination methods are listed for the same component, the reference
method shall prevail in case of dispute.
This standard applies to general Portland cement, clinker, raw material for the
preparation of the above cement, other cements and materials designated to
use this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 5762 Methods for chemical analysis of limestone, quicklime and
hydrated lime for building materials industry
GB/T 6682 Water for analytical laboratory use - Specifications and test
methods
GB/T 8170 Rules for rounding off for numerical values & expression and
judgement of limiting values
GB/T 12573 Sampling method for cement
GB/T 15000 (all parts) Directives for the work of reference materials
GSB 08-1110 Standard sample of cement raw materials for X-ray
fluorescence analysis
GSB 08-1355 Standard sample for analysis of cement clinker composition
GSB 08-1356 Standard sample for composition analysis of ordinary Portland
cement
3 Terms and definitions
The terms and definitions as defined in GB/T 15000 (all parts) and the following
terms and definitions apply to this document.
3.1
Repeatability conditions
The conditions under which the same operator uses the same equipment in
the same laboratory according to the same determination method to obtain
independent test results from the same test subject in a short time.
3.2
Reproducibility conditions
Conditions under which different operators in different laboratories use
different equipment but same determination method to obtain the test results
from the same determination object.
3.3
Repeatability limit
A value, under the repeatability condition (3.1), the probability that the
absolute difference between the two test results does not exceed this
number is 95%.
4 Basic requirements for test
4.1 Number of tests and requirements
The number of tests for each determination is specified as two; the absolute
difference between the two results is within the repeatability limit (Table 3, Table
4, Table 5). The average value of the two test results is used to indicate the
determination result.
4.2 Representation of mass, volume, titer and results
Mass is expressed in "grams (g)" and is accurate to 0.0001 g. The volume of
the burette is expressed in "milliliter (mL)"; the reading is accurate to 0.01 mL.
The titer is expressed in "milligrams per milliliter (mg/mL)".
4.3 Repeatability limit and reproducibility limit
The repeatability limits and reproducibility limits listed in this standard are
absolute deviations, expressed in terms of mass fraction (%).
4.7 Checking chloride (silver nitrate inspection)
After washing the precipitate several times as required, use water to rinse the
lower end of the funnel; continue using water to wash the filter paper and the
precipitate; collect the filtrate in a test tube; add a few drops of silver nitrate
solution (6.1.31); observe whether the solution in the test tube is turbid. If it is
turbid, continue washing and testing until it is no longer turbid when checking
by the use of silver nitrate.
4.8 General requirements for reagents
Unless otherwise specified, the reagents used shall not be lower than analytical
grade; the reagents used for calibration shall be reference reagents. The water
used shall not be lower than the requirements of the third-grade water as
specified in GB/T 6682.
5 Preparation of specimens
Take sample according to the method of GB/T 12573.The sample sent to the
laboratory shall be a representative uniform sample. The sample is divided to
about 100 g by a quartering method or a divider. After sieving through a 150 μm
square hole sieve, the debris is removed. After the sieve residue is ground, it is
passed through a 150 μm square hole sieve.
6 Chemical analysis methods
6.1 Reagents and materials
6.1.1 Hydrochloric acid (HCl)
1.18 g/cm3 ~ 1.19 g/cm3, mass fraction is 36% ~ 38%.
6.1.2 Hydrofluoric acid (HF)
1.15 g/cm3 ~ 1.18 g/cm3, mass fraction is 40%.
1.12 g/cm3, mass fraction is 99%.
6.1.12 Ethanol
The volume fraction of ethanol is 95%.
6.1.13 Absolute ethanol (C2H5OH)
The volume fraction of absolute ethanol is not less than 99.5%.
6.1.14 Glycerol [C3H5 (OH) 3]
The volume fraction is not less than 99%.
6.1.18 Nitric acid (1 + 1); (1 + 2); (1 + 9); (1 + 100)
6.1.19 Sulfuric acid (1 + 1); (1 + 4); (1 + 9); (5 + 95)
6.1.20 Phosphoric acid (1 + 1)
6.1.21 Acetic acid (1 + 1)
6.1.22 Formic acid (1 + 1)
6.1.23 Ammonia (1 + 1)
6.1.24 Ethanol (1 + 4)
6.1.25 Triethanolamine (1 + 2)
6.1.26 Sodium hydroxide (NaOH)
6.1.34 Ammonium molybdate solution (50 g/L)
Dissolve 5 g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] in hot water; after
cooling, add water to dilute it to 100 mL; store it in a plastic bottle; if necessary,
filter it before use. This solution is used within one week.
6.1.35 Ascorbic acid solution (5 g/L)
Dissolve 0.5 g of ascorbic acid (V.C) in 100 mL of water; if necessary, filter it
before use. Prepare it before use.
6.1.47 Potassium periodate (KIO4)
6.1.48 Sodium hydroxide solution (200 g/L)
Dissolve 20 g of sodium hydroxide (NaOH) in water. Add water to dilute it to 100
mL. Store it in a plastic bottle.
6.1.55 pH 4.3 buffer solution
Dissolve 42.3 g of anhydrous sodium acetate (CH3COONa) in water; add 80
mL of glacial acetic acid; add water to dilute it to 1 L. After preparation, use a
precision pH test paper to check.
6.1.56 Potassium fluoride solution (20 g/L)
Place 20 g of potassium fluoride (KF · 2H2O) in a plastic cup; add water to
dissolve it; add water to dilute it to 1 L; store it in a plastic bottle.
6.1.57 Ammonium oxalate solution (50 g/L)
Dissolve 50 g of ammonium oxalate [(NH4) 2C2O4 · H2O)] in water; add water to
dilute it to 1 L; if necessary, filter it before use.
6.1.58 Potassium sodium tartrate solution (100 g/L)
Dissolve 10 g of potassium sodium tartrate (C4H4KNaO6 · 4H2O) in water; add
water to dilute it to 100 mL.
6.1.59 pH 10 buffer solution
Dissolve 67.5 g of ammonium chloride (NH4Cl) in water; add 570 mL of
ammonia; add water to dilute it to 1 L. After preparation, use a precision pH test
paper to check.
6.1.77 Manganese monoxide (MnO) standard solution
6.32.3 Calculation and representation of results
The mass fraction of chloride ion wCl- is calculated according to formula (53).
6.33.3 Calculation and representation of results
The mass fractions of potassium oxide and sodium oxide wK2O and wNa2O are
calculated according to formula (54) and formula (55), respectively.
6.34.2 Analytical procedures
Take solution C in 6.11.2.1 directly; use an atomic absorption
spectrophotometer (6.2.15);
6.34.3 Calculation and representation of results
The mass fraction wMnO of manganese monoxide is calculated according to
formula (56).
6.35.2 Analytical procedures
Weigh about 0.2 g of specimen (m47), accurate to 0.0001 g; put it in a 100 mL
dry beaker; add 10 mL of water to disperse the specimen;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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