Refractory and flame retardant material testing
Basic introduction
LCS integrates resources from the entire industry to test products including refractory materials, fireproof materials, flame retardant materials, thermal insulation materials, and fireproof coatings. It focuses on projects such as fire resistance, combustion performance, flame retardant grade, fireproof grade, and flue gas oxygen index. According to domestic and foreign testing standards, it provides authoritative third-party CMA/CNAS qualification test reports.
Testing services
Common refractory material testing
Graphite, silica bricks, clay bricks, AZS bricks, corundum bricks, directly bonded magnesia-chrome bricks, silicon carbide bricks, silicon nitride bonded silicon carbide bricks, nitrides, silicides, sulfides, borides, carbides and other non-oxide refractory materials; calcium oxide, chromium oxide, aluminum oxide, magnesium oxide, beryllium oxide, diatomaceous earth products, asbestos products, insulation boards, furnace fillers, ramming materials, castables, plastics, refractory mud, refractory gunning, etc.

Flame retardant material testing
Flame retardant fabrics, flame retardant chemical fibers, flame retardant plastics, flame retardant rubber, fire retardant coatings, flame retardant wood materials and flame retardant paper, inorganic non-combustible filling materials, flammability, non-combustibility, flame retardancy, solid phase flame retardancy, gas phase flame retardancy, physical effect flame retardancy, etc.

Fire retardant coating testing
Fire retardant coatings for surfaces, fire retardant coatings for steel structures, fire retardant coatings for wood, fire retardant coatings for concrete structures, fire retardant coatings for tunnels, fire retardant coatings for cables, fire retardant coatings for buildings, etc.

Fire retardant testing of building materials
Testing of various fire-resistant building components, fire resistance limit, toxicity classification of smoke produced by materials, non-combustibility of building materials, smoke density grade, flammability of building materials, combustion performance classification of building materials and products, fire retardant performance, etc.

Fire retardant testing of automobiles and rail transit
Testing the combustion characteristics of automobile interior materials is based on GB 8410; testing of fire retardant and flame retardant materials for rail transit is based on TB/T 3138 Technical conditions for flame retardant materials for locomotives and vehicles, and TB/T 3237 Technical conditions for flame retardant materials for motor vehicle interiors.

Fire test for furniture and soft furnishings
Combustion level (A1, A2, B1, B2), curtains/curtains, wooden floors/carpets/plastics/rubber floors/floors/artificial stones and other flooring materials, soft furniture and components, etc.
Test items
Structural performance: porosity, bulk density, water absorption, air permeability, Pore ​​size distribution, etc.
Thermal properties: thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, thermal conductivity, thermal emissivity, etc.
Mechanical properties: compressive strength, tensile strength, flexural strength, torsional strength, shear strength, impact strength, wear resistance, creep, bonding strength, elastic modulus, etc.
Performance: refractoriness, load softening temperature, reburning line change, thermal shock resistance, slag resistance, acid resistance, alkali resistance, hydration resistance, CO erosion resistance, conductivity, oxidation resistance, etc.
Fire retardant coating test items: fire resistance limit, fire resistance time, state, fineness, drying time, adhesion, flexibility, impact resistance, water resistance, moisture and heat resistance and flame resistance time, coating adhesion, impact resistance, water resistance, moisture and heat resistance, flame resistance, appearance Color, state in container, drying time, initial drying crack resistance, water resistance, dry density, acid or alkali resistance (except additional fire resistance), bonding strength, compressive strength, resistance to cold and heat cycles, fire resistance, heat exposure resistance, moisture and heat resistance, resistance to freeze-thaw cycles, resistance to salt spray corrosion
Flame retardant material testing: safety monitoring, environmental protection testing, energy-saving testing, fire resistance limit, flame retardancy, ignition, non-combustibility, flammability, smoke density, smoke toxicity, flame retardant testing, combustion characteristics, heat release and smoke, fire resistance, combustion performance, combustion calorific value, fire resistance, high temperature resistance, fire rating test, etc.

The current mainstream evaluation of material flame retardancy mainly uses the following points:
1. Ignition and flammability, that is, the difficulty of being ignited; 2. Flame propagation speed, i.e. the speed at which the flame spreads along the surface of the material; 3. Fire resistance, i.e. the speed at which the fire penetrates the material component; 4. Release rate (HRR), i.e. the heat released and the speed at which the material is released when it burns; 5. The difficulty of self-extinguishing; 6. Smoke generation, including the amount of smoke generated, the smoke release rate and the composition of the smoke; 7. Combustion performance classification: seven levels, namely: A1, A2, B, C, D, E, F, etc.
Testing standards
GB/T 2997 Determination of bulk density, apparent porosity and true porosity of dense shaped refractory products
GB/T 7322 Refractory materials Refractoriness test method
YB/T 370 Refractory materials Load softening temperature test method
GB/T 7320 Refractory materials Thermal expansion test method
GB/T 3001 Refractory materials Normal temperature flexural test method