T/SHCTA 001-2023 P·SM 52.5 Steel Slag Micro Powder Portland cement

Scope

Scope: This document specifies the terms and definitions, materials, requirements, test methods, inspection rules, packaging, marking, transportation, and storage for P·SM 52.5 steel slag micronized silicate cement. This document is applicable to the production and inspection of steel slag micronized silicate cement used in general industrial and civil construction, underground engineering, waterproofing projects, large-scale concrete projects, road engineering, and other applications. Main technical content: 4.1 P·II 52.5 silicate cement: P·II 52.5 silicate cement shall comply with the provisions of GB 175. 4.2 Steel slag micronized: The metal iron content in steel slag micronized shall not exceed 0.5%. The test for metal iron content shall be conducted in accordance with YB/T 4188. Density, moisture content, free calcium oxide content, sulfur trioxide content, chloride ion content, reactivity index, flowability ratio, and stability indicators shall comply with the provisions of GB/T 20491. 4.3 Half-hydrated desulfurized gypsum: Half-hydrated desulfurized gypsum shall comply with the provisions of GB/T 9776-2022 for Class S 2.0 grade (inclusive) or higher desulfurized construction gypsum. 5 Requirements 5.1 The sulfur trioxide content in cement (mass fraction) shall not exceed 4.0%. 5.2 The chloride ion content in cement (mass fraction) shall not exceed 0.06%. 5.3 The alkali content in cement shall be expressed in terms of Na2O + 0.658 K2O. If active aggregates are used and the user requires low-alkali cement, the alkali content in cement shall not exceed 0.60% or be determined by mutual agreement between the buyer and seller. 5.4 Specific surface area: The specific surface area shall not be less than 350/kg. 5.5 Setting time: The initial setting time shall not be less than 100 minutes, and the final setting time shall not exceed 600 minutes. 5.6 Stability: The steam-pressure expansion rate shall not exceed 0.50%. 5.7 Strength: The strengt

Development Information

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