Building Materials Non Combustibility Test Apparatus

1. Scope of application:

It is suitable for the non-combustibility test of the main components of homogeneous building products and non-homogeneous building products under specific conditions.

2. Compliant standards:

Comply with GB/T5464-2010, ISO1182:2002 test standard.

3. Test device:

3.1 The test device includes heating furnace, sample rack, airflow hood, thermocouple, voltage stabilizer, voltage regulator, control instrument, and a computer for control;

3.2 Heating furnace:

3.2.1 The heating furnace tube is made of bauxite refractory material with a density of (2800±300)kg/m³, height (150±1)mm, inner diameter (75±1)mm, wall thickness (10±1)mm;

3.2.2 Heating furnace system: a heating coil is wound on the heating furnace tube according to the standard of Appendix B of GB/T5464-2010. The outside is covered with a heat insulation layer, the conical air flow stabilizer is fixed at the bottom of the heating furnace, and the airflow hood is fixed on top of the furnace.

3.3 Heating temperature: 1250℃

3.4 Thermocouple:

3.4.1 A K-type thermocouple with a wire diameter of 0.3mm and an outer diameter of 1.5mm is used, and its thermal junction is insulated and cannot be grounded. The thermocouple should meet the first-class accuracy requirements specified in GB/T16839.2, and the armor protection material is stainless steel;

3.5 Specimen holder and insertion device

3.5.1 The sample frame is made of nickel/chromium or heat-resistant steel wire, and a layer of heat-resistant metal wire mesh disc is installed at the bottom of the sample frame. The mass of the sample frame is (15±2)g;

3.5.2 The sample holder is suspended at the lower end of a support member made of stainless steel tube with an outer diameter of 6mm and an inner diameter of 4mm.

3.5.3 The sample holder is equipped with an insertion device, which can smoothly descend along the axis of the heating furnace to ensure that the sample is accurately located in the geometric center of the heating furnace during the test. The insertion device is a metal sliding rod that slides freely in vertical guide grooves on the side of the furnace.

4. The main features of the host

4.1 Computer control, with the advantages of reasonable structure, stable performance and easy operation;

4.2 WINDOWS XP operation interface, LabVIEW style, perfect security mechanism. During the test, the measurement results are displayed in real time, the temperature rise and measurement time required by the standard are automatically and accurately recorded, and the perfect curve is dynamically drawn. The data can be permanently stored, retrieved and printed out, and the report can be printed directly.