T/CDJC 002-2022 Light desulfurization plaster gypsum for wall coating

Scope

Scope: This standard specifies the terms and definitions, raw materials, technical requirements, test methods, inspection rules, and packaging, marking, transportation, and storage of lightweight desulfurized plaster for plastering. This standard applies to lightweight desulfurized plaster for plastering used in non-water-contact indoor rooms of buildings, with desulfurized gypsum as the main component. Main technical content: 5. Technical requirements 5.1 The appearance and color of lightweight desulfurized plaster powder should be uniform, without obvious impurities or lumping. 5.2 The fineness of lightweight desulfurized plaster powder should not exceed 40% of the sieve residue on a 0.2mm square-hole sieve. 5.3 The performance indicators of lightweight desulfurized plaster should meet the requirements of Table 5.3. Table 5.3 Performance Indicators of Lightweight Desulfurized Plaster Item Indicator Setting time Initial setting, h ≥ 1 Final setting, h ≤ 6 Volume density, kg/m3 ≤ 1000 Thermal conductivity, W/(m·K) ≤ 0.20 Water retention rate, % ≥ 80 Flexural strength (dry), MPa ≥ 1.0 Compressive strength (dry), MPa ≥ 4.0 Tensile bond strength, MPa ≥ 0.3 Limit of radionuclides Internal radiation index IRa ≤ 0.5 External radiation index Ir ≤ 0.5 5.4 The construction of lightweight desulfurized plaster should comply with the relevant provisions of the current industry standard "Technical Code for the Application of Plaster" JC/T 60005.

Development Information

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