This part specifies the principle, equipment, specimens, test steps, result calculation and other contents of the test method for the compressive strength of dense shaped refractory products at room temperature (liner test method). It is used together with GB/T5072.1 to determine the compressive strength of dense shaped refractory products at room temperature. GB/T 5072.2-2004 Test method for compressive strength of dense shaped refractory products at room temperature Part 2: Liner test method GB/T5072.2-2004 Standard download decompression password: www.bzxz.net

HS 81.080
National Standard of the People's Republic of China
GB/T5072.2—2004
Successor GB/T5072—1989
Dense shaped refractory products
Test method for cold compressive strength-Part 2: Test method with lining
Dense shaped refractory products
Test method for cold compressive strength-Part 2: Test method with lining packing
2004-06-09 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2004-12-01 Implementation
G/T50724 Test method for compressive strength of dense shaped refractory products at room temperature is divided into two parts. Part 1: Test required for element packing
Part 2: Block test method.
This part is the second part of GB/T 5072.2-2C4
This part replaces GB/T 5072-19 Test method for compressive strength of dense shaped refractory products at room temperature. Compared with the original (B/T5072-1985), this part has been modified as follows: an adapter has been added, the tolerance of the sample size is reduced from ±1m to ±2m, the parallelism and straightness tolerance of the finished sample is reduced from no more than % to no more than 2%, and the liner thickness is changed from 2mm to 3mm--7mml. This part was proposed by the China Iron and Steel Association. This part was submitted by the National Technical Committee for Standardization of Refractory Materials (SAC/TC193). This part was drafted by the Geyang Fire Village Refractory Research Institute and the Xinmi Blast Furnace Refractory Factory. The main drafters are: Fu Xin, Zhang Ya, Wei Facan, Lai Liyi, Wang Tianwang. The revised versions replaced by this part are: YR/T371-197:: GB/TSU72-19851, GB/T5072.2-20D4
Test method for compressive strength of dense shaped refractory products at room temperature Part 2: Pad test method
This part specifies the principle, equipment, test specimens, test steps, result calculation, etc. of the pad test method for the compressive strength test of dense shaped refractory products at room temperature. It is used together with G/T72.1 to determine the total compressive strength of dense shaped refractory products with a belt. -2 Normative references
The clauses in the following documents become the clauses of this part through the reference of this part of G5072. For all dated referenced documents, all subsequent amendments (excluding previous revisions) or downgrades shall not apply to this part. However, the parties who have reached an agreement on whether the latest versions of these documents can be used. For all unquoted referenced documents, the latest versions shall apply to this part. GB/T2997 Compressive strength of dense shaped refractory products degree, apparent porosity, true porosity formula GB/T732) real-shaped resistant large product trial preparation method GB/T8170 numerical revision of heat standard
GB/T10325 shaped and refractory product selection and acceptance code GB1893U pre-refractory material technology
3 definition
This part adopts the definition of /183.
4 principle
Under specific conditions, for giant The sample of different sizes is loaded at a constant pressure rate until it breaks. The load bearing of the sample is separated from the sample loading platform by a sealing plate. The load bearing of the sample is calculated based on the large force and average cross-section temperature and humidity when the sample is rolled. This standard is a constant quality control method. In addition, this test is based on the standard configuration and can avoid the use of other methods that cannot reach the density level in practice. The test machine shall be capable of applying a force of 1.0 MPa/s + D,: MPa/s until the specimen breaks. When the enlarged dimension of the specimen before loading is 50 mm, the area of ​​the upper platen of the test machine shall not exceed 1 m2. Test machines that do not meet this requirement may be equipped with an auxiliary specimen adapter, see Figure 1 and Figure 2, which shall be installed in the middle of the upper and lower plates of the test chamber. The thickness of the adapter plate shall be at least 10 mm. The lower platen of the test chamber shall be marked so that the specimen or adapter is in the center (the lower platen is concentric). 6.2 The accuracy of the standard caliper is 0.02mm, CB/T5072.2-2004 1---Test caliper version 2--Spherical blue 3--Spherical bearing, Sealing plate---Pattern, a ball seat; a ball seat; a top plate; a rigid frame; a number. 6.3 Angle plate. Figure 1 Auxiliary adapter and spherical seat The section is for children* 2. The auxiliary adapter and spherical seat of the test sample 6. 4T The length of the end box can be controlled within 11cC1.5t. 6.5 Tree pad
Sequence size of 3mm--7mm non-ripple effect paper hard paper photography 7 Sample
7.1 Take samples according to GB/T1C325 or other standards: 7.2 Test size (such as
) vertical grid Gm u2m distance m ± 2mm. Column rate, h up to 5mml2mm solid,
c reverse length 65mm-2mm or 75mm=2mm square GE/T5072.2-2004
If the sample size cannot meet this requirement: Use the largest possible round column (height equal to the diameter of the square), the minimum size of the sample is 10 times the size of the normal large plate. The high brick can be selected as needed (the test size should be indicated in the test report) 7.3 The sample should be scratched or drilled from the pressure surface of the product to ensure the test The pressurization direction and the molding direction are the same (except for special cases). Samples with defects or quality defects should be recorded and discarded. 7.4 The test bar should be taken from other products or drilled. The positive and negative ends of the sample should be as parallel as possible and as perpendicular to the processing direction as possible. The parallelism of the sample should be checked at 4 points in a row. For the tensile test, the measuring points are located at the two ends of the vertical axis. For the upper test, the measuring points are located at the two ends of the compressed bar. The difference between the three measuring points should not be greater than the corresponding 2.6 Place the sample On a plane, use the bean edge of a triangle to measure the straightness of the specimen at four corresponding heights. The original feeler gauge should not exceed 7.7% of the original height between the specimen and the negative. Dry the specimen in a drying oven at 110°C to a constant temperature, and then cool to room temperature. Before testing, the test should be carried out. 8 Test steps
8.1 Use a caliper to measure the straightness of the center line of the two test plates of the specimen. The material should be 5..mm. Based on the values ​​of the center line diameter at the four points of the two test surfaces, calculate the average initial surface area A. 2 Place the specimen on the test surface The upper and lower head pressure plates or adapters of the testing machine are placed in the center position: insert a pad between the test plate and the upper and lower positive plates. 8.3 Select the testing machine model: make the tester use 1% of the calculated breaking load value. 8.4 Continue to apply force uniformly at a speed of 1.0MPa/s±5.【MP/s until the sample breaks, that is, the sample can not withstand further pressure increase. Record the maximum load indicated. 9. The room temperature withstand pressure of the sample is calculated according to the following formula: F
Where,
1-normal pressure, unit is MPaTest period:
) Implementation standard (i.e. G/T5072.2-2004) GI/T5072.2-2004 bzxz.net
Sample brand number, manufacturer, size, quality, etc.): number of samples;
Dimensions of the samples (see 7.2);
Strength value of each sample;
Average strength value of the batch of samples;
Tester
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