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GB/T 9966.3-2020: Test methods for natural stone - Part 3: Determination of water absorption, bulk density, true density and true porosity
Status: Valid GB/T 9966.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 9966.3-2020 | English | 189 |
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Test methods for natural stone - Part 3: Determination of water absorption, bulk density, true density and true porosity
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GB/T 9966.3-2020
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| GB/T 9966.3-2001 | English | 90 |
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Test methods for natural facing stones -- Part 3: Test methods for bulk density, true density, true porosity and water absorption
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GB/T 9966.3-2001
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| GB/T 9966.3-1988 | English | 199 |
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Test methods for natural facing stones--Test methods for bulk density, true density, true porosity and water absorption
| Obsolete |
GB/T 9966.3-1988
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PDF similar to GB/T 9966.3-2020
Basic data | Standard ID | GB/T 9966.3-2020 (GB/T9966.3-2020) | | Description (Translated English) | Test methods for natural stone - Part 3: Determination of water absorption, bulk density, true density and true porosity | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q21 | | Classification of International Standard | 91.100.15 | | Word Count Estimation | 10,172 | | Date of Issue | 2020-03-06 | | Date of Implementation | 2021-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 9966.3-2020: Test methods for natural stone - Part 3: Determination of water absorption, bulk density, true density and true porosity
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Test methods for natural stone - Part 3.Determination of water absorption, bulk density, true density and true porosity
ICS 91.100.15
Q21
National Standards of People's Republic of China
Replace GB/T 9966.3-2001
Natural stone test method
Part 3.Water absorption, bulk density,
True density and true porosity test
2020-03-06 released
2021-02-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
GB/T 9966 "Natural Stone Test Method" is divided into 18 parts.
---Part 1.Compressive strength test after drying, water saturation, freeze-thaw cycles;
---Part 2.Bending strength test after drying, water saturation, freeze-thaw cycles;
---Part 3.Water absorption, bulk density, true density, true porosity test;
---Part 4.Abrasion resistance test;
---Part 5.Hardness test;
---Part 6.Acid resistance test;
---Part 7.Hanging strength test of stone pendant combination unit;
---Part 8.Testing the structural strength of the stone hanging system with uniform static pressure difference;
---Part 9.(by measuring the fundamental frequency of resonance) determination of dynamic elastic modulus;
---Part 10.Determination of the seismic performance of pendant assembly units;
---Part 11.Determination of accelerated aging strength by chilling and heating;
---Part 12.Determination of static elastic modulus;
---Part 13.Determination of Capillary Water Absorption Coefficient;
---Part 14.Determination of resistance to fracture energy;
---Part 15.Determination of resistance to salt spray aging strength;
---Part 16.Determination of linear thermal expansion coefficient;
---Part 17.Determination of salt crystal strength;
---Part 18.Lithofacies analysis.
This part is Part 3 of GB/T 9966.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 9966.3-2001 "Natural facing stone test method Part 3.Bulk density, true density, true porosity,
Test method of water absorption. Compared with GB/T 9966.3-2001, except for editorial changes, the main technical changes in this Part are as follows.
--- Added normative reference documents (see Chapter 2);
---Added the terms and definitions of true density and true porosity (see Chapter 3);
---Modified the oven temperature range (see 4.1, 2.1 in.2001 edition);
---Add special sample specifications (see 5.1.1);
---Modified sample drying temperature, time and constant weight test method (see 6.1.1, 6.2.1, 4.1.1, 4.2.1 of the.2001 edition);
---Modified the test accuracy (see 6.1, 6.2, 4.1, 4.2 of the.2001 edition);
---Modified the operation process of the water saturation test (see 6.1.2, 4.1.2 of the.2001 edition);
---Modified the water quality measurement operation process, and added the measurement content, diagrams and notes of the electronic balance (see 6.1.3, 4.1.3 of the.2001 edition);
--- Added part of the test report (see Chapter 8, Chapter 6 of the.2001 edition).
This part is proposed by China Building Materials Federation.
This part is under the jurisdiction of the National Stone Standardization Technical Committee (SAC/TC460).
This section was drafted by. Sinoma IOL Research Institute Co., Ltd., Beijing Sinoma IOL Research Institute Co., Ltd., Universal Stone (Fu
Construction) Co., Ltd., Anhui Keystone Weiye Environmental Protection Technology Co., Ltd.
The main drafters of this section. Zhou Junxing, Yu Quan, Li Yongqiang, Dong Zhihao, Liu Wuqiang, Wu Dawei, Liu Xuzhen.
The previous versions of the standards replaced by this part are as follows.
---GB/T 9966.3-1988, GB/T 9966.3-2001.
Natural stone test method
Part 3.Water absorption, bulk density,
True density and true porosity test
1 Scope
This part of GB/T 9966 specifies the terms and definitions of natural stone water absorption, bulk density, true density, and true porosity test.
Equipment, samples, test procedures, test results and test reports.
This section applies to the determination of water absorption, bulk density, true density and true porosity of natural stone.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 13890 Natural Stone Terminology
GB/T 17670 Unified numbering of natural stone
3 Terms and definitions
The following terms and definitions defined in GB/T 13890 apply to this document.
3.1
True density
Exclude the influence of open and closed pores contained in the stone, reflecting the true density of the rock.
3.2
True porosity
The volume percentage of closed pores contained in the stone.
4 Equipment
4.1 Blast drying oven. The temperature can be controlled within the range of 65℃±5℃.
4.2 Balance. Maximum weighing 1000g, accuracy 10mg; Maximum weighing.200g, accuracy 1mg.
4.3 Water tank. The bottom surface is flat, and there is a glass rod as a sample support.
4.4 Metal mesh basket. It can meet the requirements of various specifications and has sufficient rigidity.
4.5 Pycnometer. the volume is 25mL~30mL.
5 Sample
5.1 Water absorption and bulk density
5.1.1 The sample is a cube with a side length of 50mm or a cylinder with a diameter and a height of 50mm, the size deviation is ±0.5mm, and each group is five pieces.
For special requirements, other regular-shaped samples can be used, and the geometric volume of the shape should not be less than 60cm3.
The ratio of surface area to volume should be in the range of 0.08mm-1~0.20mm-1.
5.1.2 The sample should be taken from a representative part and should not contain defects such as cracks.
5.1.3 The surface of the sample should be smooth, and the rough surface should be polished smooth.
5.2 True density and true porosity
Take about 1000g of the clean sample and break it into particles less than 5mm; divide it into quarters, take a portion and grind it to pass 63μm
Take 150g of the powder sample from the standard sieve as the sample.
6 Test procedure
6.1 Water absorption and bulk density
6.1.1 Place the sample in a blast drying oven at 65°C±5°C for 48h to constant weight, that is, weigh it after drying for 46h, 47h, and 48h.
Measure the mass of the sample. When the mass remains constant, it indicates that it has reached a constant weight, otherwise the drying continues until the constant mass appears 3 times. Put into the desiccator
Cool it to room temperature, then weigh its mass (m0), accurate to 0.01g.
6.1.2 Place the sample on the glass rod support in the water tank, and the interval between the samples should not be less than 15mm. Add deionized water or distilled water (20℃
±2℃) to half the height of the sample, let it stand for 1h; then continue to add water to three-quarters of the height of the sample, then let it stand for 1h; continue to fill water, water
The surface should exceed the height of the sample by 25mm ± 5mm. The sample is taken out at the same time after being soaked in water for 48h±2h, wrapped in a damp towel, wringed out
Wipe off the moisture on the surface of the sample with a wet towel, and immediately weigh its mass (m1), accurate to 0.01g.
6.1.3 Immediately place the water-saturated sample in a metal mesh basket and immerse the mesh basket together with the sample in deionized water at 20℃±2℃ or distill
In the water, carefully remove the air bubbles attached to the basket and the sample, and weigh the total mass of the sample and the basket in the water, accurate to 0.01g. Separate weighing network
The mass of the basket in the same depth of water is accurate to 0.01g. The difference between these two measurements (m2) can be directly measured when the balance allows it, and the result
Accurate to 0.01g. The weighing device is shown in Figure 1 or Figure 2.
Note. When using an electronic balance for weighing, as shown in Figure 2, set the balance to zero when the basket is in the same depth of water to directly measure the mass (m2) of the sample in the water.
6.2 True density and true porosity
6.2.1 Put 150g of powdered sample into a weighing bottle, put it in a blast drying oven at 65℃±5℃, and dry for 48h to constant weight, that is, dry
Weigh the mass of the sample at 46h, 47h, and 48h. When the mass remains constant, it indicates that it has reached a constant weight. Otherwise, continue to dry until it appears 3 times
Constant quality. Take it out and put it in a desiccator to cool to room temperature.
6.2.2 Weigh three dry powder samples (m0'), each about 10g, accurate to 0.001g. Each powder sample was put into a clean pycnometer.
6.2.3 Pour distilled water or deionized water into the pycnometer, whose volume does not exceed half of the volume of the pycnometer. Put the pycnometer in a water bath to boil
Boil for 10min~15min or put the pycnometer in the vacuum dryer for 30min.
6.2.4 After drying the pycnometer and allowing it to cool to room temperature, pour distilled water or deionized water into it again to 2mm below the mouth of the pycnometer.
3mm, mark the liquid surface. Weigh its mass (m1'), accurate to 0.001g.
6.2.5 Empty the pycnometer and rinse it, refill it with distilled or deionized water to the mark and weigh its mass (m2'), accurate to 0.001g.
7.5 Results
Calculate the arithmetic mean of water absorption, volume density, true density, and true porosity of each group of samples as the test result. Bulk density, true density
Take three significant figures; take two significant figures for true porosity and water absorption.
8 Test report
The test report should contain at least the following information.
a) The commercial name of the stone according to GB/T 17670;
b) The number of samples, specifications and dimensions, and surface treatment conditions (according to test requirements);
c) The name and address of the testing laboratory. If the location of the test is not a testing laboratory, the location of the test should be indicated;
f) Water absorption, bulk density, true density and true porosity of each sample;
g) The average value of water absorption, bulk density, true density and true porosity of each group of samples;
h) Standard deviation, rounded to two significant digits.
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