抗折强度（Flexural strength）.docVIP

抗折强度（Flexural strength） Test methods for strength and compressive strength of dense refractory casting materials Theme content and scope of application This standard provides for the definition, determination principle, equipment and test of the normal temperature and compressive strength of dense refractory castings. Sample, test procedures and data processing methods. This standard is applicable to the determination of the normal temperature and pressure after curing, drying or burning of tight refractories Strength. Reference standard Methods for determination of dense refractory casting consistency and sample preparation The method of test method for the rate of change of dense refractory casting line GB 8170 digital modification rules 3 define At room temperature at room temperature, the sample is subjected to bending load. In the unit MPa (N/mm [2]). 3.2 normal temperature and pressure strength at room temperature, the sample is subjected to bending load and fracture stress. In the unit MPa (N/mm [2]). Principle 4 The tensile strength of 4.1 is on the three-point bending device, which shall apply the tensile stress to the sample size according to the specified loading rate. Until the sample breaks. 4.2 the compressive strength is in the pressurized device, and the pressure is applied to the sample size according to the specified loading rate Sample destruction. 5 the equipment 5.1 the anti-folding tester can be used in various types of folding testing machine, or pressure testing machine with anti-folding fixture, and should be satisfied The following requirements: A. The maximum load measured is not less than 10% of the range. B. The sample can be uniformly charged at the prescribed rate and can record or indicate the load during the sample rupture. C. The measured value error should be less than or minus 2%. D. The anti-folding fixture consists of two parallel support rolls and a center of the roll, which is located in the supporting roller In the center, t