P-type Portland cement: without mixing materials, with a tricalcium silicate content of 50% -60%, a compressive strength of ≥ 42.5MPa after 28 days, an initial setting time of ≥ 45min, a final setting time of ≤ 600min, a water-soluble chromium (VI) content of ≤ 5mg/kg (in accordance with GB 31893-2015 standard), suitable for high-strength concrete pouring, prestressed component production and other scenarios. ​

P · II type Portland cement: mixed with ≤ 5% granulated blast furnace slag, magnesium oxide content ≤ 5.0%, sulfur trioxide ≤ 3.5%, frost resistance grade up to F200, suitable for outdoor engineering such as roads and bridges in cold regions.
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Strength level subdivision: covering three core levels of 32.5, 42.5, and 52.5, with 42.5 accounting for 58% of the annual export volume, suitable for all scenarios from masonry mortar to high-rise building foundations. ​

Quality control standard: The sampling size of each batch of products is ≥ 20kg, tested according to GB/T 176-2017 standard, covering 10 key indicators such as chloride ion content, stability, and radioactivity. The detection rate of non-conforming products is 0.