This standard is applicable to the determination of true density of refractory products and refractory raw materials. GB/T 5071-1997 Test method for true density of refractory materials GB/T5071-1997 Standard download decompression password: www.bzxz.net

GB/T 50F—1997
IS）Foreword
ISO (International Organization for Standardization) is a global cooperation composed of national standards committees (IS) or member organizations. The formulation of international standards is subject to the report of the relevant technical committees. Any member unit can modify the work proposed by the technical committee at any time. It only needs to explain its competition. Including international associations, governments and non-governmental organizations can contact 30. If the work is required to be followed, the international standard submitted by the technical committee will be checked by the member units in the draft. After being properly recognized by the [S] committee, it can be recognized as an international standard. ||Chen Special 1S018 Civil 190, TC33 Refractory materials collection requirements will be issued and collected by the end of 192, the effective units are as follows,
Course source
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1 Scope
National Standard of the People's Republic of China
True density test method of refractory materials
Hefrgctory materials-Determiaallon of 1rue density This standard applies to the determination of the true density of refractory products and refractory raw materials. 2 Reference standards
CB/T 5071-1997
Idt1505018.1983
1/T60716
The following referenced articles become the text of this standard by being used in this standard. During the period of this standard, the versions shown are valid. All standards are subject to revision. The parties using the technical standards should discuss the possibility of using the latest versions of the following standards. GB60G355 Test response
SOR53e Vocabulary of refractory materials industry
GE/T1i325-85 Rules for the evaluation, sampling, acceptance, storage and transportation of refractory products 3 Definitions
This standard adopts the following definitions.
3.1 Width
The ratio of the mass of the material to its true volume.
3.2 Weight volume
The volume of the porous material in a porous body.
4 Principle
4.1 Make the sample dense and fine. When the sample is fully closed, the mass and true volume of the pores below can be measured to obtain the true density. The volume of the fine material is determined by a specific gravity bottle and a liquid of known density. The density of the liquid used must be gradually controlled or measured carefully. 4.2 Unfired refractory products are used as pre-treated refractory products. The treatment process should be conducted jointly by both parties concerned. 5 Equipment
5.1 [Specific gravity bottle, 25mT, 50ml, or 100L, equipped with a capillary. 5.2 Balance, measuring pressure 1 (.1mg.
5.3 True gasket. Can be vacuumed to a residual pressure of no more than 2.5kP:. And equipped with a pressure indicator. 5.4 Constant temperature pad, can maintain 2! above room temperature, +0.2F. 5.5 The aperture of the tester is 3um and meets the requirements of GB6003. 5.6 Ten ovens
, 1) Filling method for the change of the temperature according to the sense of the temperature, the temperature must be controlled to this ten grid, the two containers have different energy expansion coefficients, if the limit has a complete negative lead to the old and strange equipment
State Administration of Technical Supervision 1997-11-11 batch oil T998-05 -01 Implementation
5.7 Firing machine
6 Test sample
GB/T5071—1997
6.1 The sampling shall be carried out according to H/T11:32> or other standard sampling schemes to be determined by both parties later. 6.2 For shaped flammable products, the number of samples taken from each product shall be in accordance with the relevant party's consent and shall be stated in the test report. For the convenience of statistical analysis, when the test acid blocks are sieved, the number of samples taken from the same block shall be the same. 6.3 The sample shall be broken and ground until it passes through the test sieve (5.5). 6.4 When the sample is passed through the grinding mill, care shall be taken not to bring in or be obstructed by others. 65 Before the test, the sample shall be dried in a drying oven at 12 °C until constant weight is obtained. The difference between the weighing and the weighing shall not exceed 3.1. Each time a single test piece is made, the humidity in the chamber shall be reduced to a certain level (.7). 6.6 When preparing each test piece of the material, be careful not to dehumidify it. This type of test piece shall be dried at 500 °C for 1 minute and the test report shall be completed.
Operation
7.1 Initial mass of the test material
7.1.1 Clean the empty specific gravity bottle (5.1) and ensure that it is completely clean. Sebum will be replaced by specific gravity or ground, check its temperature [receive room record 7.1.2 Weigh the clean empty specific gravity bottle with storage stopper and make sure it is 1\, (01:2 more. 7.1.3 The company's new internal example is ten test materials. Its or approximately equivalent to the specific gravity volume before / 3. When the specific gravity bottle containing the test material reaches the ambient temperature again, make a record, accurate to the center. 0002: After two times of your plate, it is the initial test material (,. Note, for materials that are difficult to wet, you can use the previous method (% Appendix A7.2 Specific gravity bottle containing test material and test reduction 7.2.1 Determination of mass 7.2.1 Add degassed distilled water of a specified density (see Table 1) to a specific gravity bottle (weighed in accordance with 7.1.3) until it reaches 1/2 or 2/3 of the specific gravity. Place the bottle in a vacuum with a positive pressure of no less than 2.5P (3) until there is no more gas above the surface. The specific gravity bottle can be charged through a dryer and other devices can be used to ensure complete circulation. When the liquid used is not water, care should be taken to ensure that the positive pressure used is not exceeded. 7.2.2 Fill the pycnometer with water or other selected deionized water until the sample in the pycnometer is allowed to settle and the upper layer is slightly mixed (usually, the sample is freshly poured overnight). 7.23 Carefully fill the pycnometer, insert the waste container, and carefully remove any leaking rollers. Place the pycnometer in a thermostatically controlled chamber (1) and raise the temperature to between 2°C and 5°C above the ambient temperature (this temperature is related to the entire test temperature). Keep the pycnometer constant at 1°C = n. 2 K.
72.4 When the temperature is too high or too high, the liquid in the pycnometer will leak out. Carefully filter the liquid with filter paper. When the pycnometer reaches the test temperature, no filter fluid will leak out of the pores. Take the pycnometer out of the bath with constant pressure, being careful not to let the heat on your hands increase the humidity of the pycnometer and cause harmful liquid to leak out (put the fully filled pycnometer in cold water for a few seconds to prevent the temperature from rising. Be careful not to wet the bottle head or bottle stopper). Store the pycnometer outside. Weigh accurately to 1.U002R (quality m1), 7.3 Determination of the mass of the micro-solid
1.3.1 Clean the specific gravity bottle in an empty space. Use water to spot other concentrated solids: the specific gravity bottle does not reduce much. 7.3.2 Repeat the operations described in 7.2.3 and 7.2.1 to determine the mass of the specific gravity bottle containing the liquid < mass stop m; 8 The result is
B.1 Calculate its density using the calorimetric formula
p-ms+mm
Note, 1》The raw material properties of the sample before shaping will be considered as an area of ​​​​unknown international standards, 14G
GB/T 5077-1997bzxZ.net
Formula 10, P- is the density of the filter element under constant temperature, water density 13:4msm- is the value determined by 7.1.3, 7.2.4 and 7.3.2. 8.2 True density is expressed in kg/u or :, and the water density at 115℃~30℃ is shown in the following table. r
Test information
Test report shall include the following contents:
a) Sample
b) Test unit:
r.) Test conditions:
d) Used mark
e) Experimental material, including whether it is old or not, type, batch size, and acceptance criteria:
e) If necessary, indicate the number of test samples per product (i.e. the number of test samples per product):
h) Sample pretreatment method:
|Vacuum pressure tester
k) Test body used,
1) Test degree:
m) Single and average position of vacuum degree of quick-draw products,.g'ar
n. 5ss 943
n. 15 774
0.998 233
6. 997 392
7 E55
. 597 225
. s9 -1
2. 596 4:
3.995 5a1
.9 648
GA/F507i—1997
Appendix A
Optional Supplement
Alternative Methods for Hard-to-Wet Materials
If the test material is hard to wet, the test material shall be immersed in the liquid and the following substitutions may be used.A1
? Fill the pycnometer with degassed distilled water or a liquid of known density, the volume of which shall not exceed 2/1 of the volume of the pycnometer. Weigh the pycnometer and the liquid to the nearest 0.cc02g.A3 The dry sample shall be approximately 1/3 of the sample weight. Weigh the whole bottle again, drop rate (,CC(12. A. The difference between the weighings this time is the initial quality of the test. Agglomeration B
(standard record)
test error
If a parallel test is done, the total test error for the product quality shall not exceed 0.2% ta2
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