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    服務熱線

    海鷗牌42.5中熱硅酸鹽水泥

    2021-01-29

    42.5 Moderate heat Portland cement

    檢驗項目

    Project

    計量單位

    標準要求

    GB/T200--2017

    本廠實際

    Actual level

    比面積

    m2/kg

    ≥250

    300

    凝結時間(min

    Coagulating time

    初凝時間

    ≥60

    120—270

    終凝時間

    ≤720

    240—360

    安定性(沸煮法) Stability

    合格

    合格

    SO3 %

    ≤3.5

    2.5

    MgO %

    ≤5.0

    ≤3.8

    燒失量(%)Loss on ignition

    ≤3.0

    ≤1.8

    不溶物(%)
    Non-dissolution substance

    ≤0.75

    ≤0.5

    水化熱

    3

    kJ/kg

    ≤251

    <247

    7

    kJ/kg

    ≤293

    <289

    抗折強度

    Break strength

    3

    MPa

    ≥3.0

    >4.5

    7

    MPa

    ≥4.5

    >5.5

    28

    MPa

    ≥6.5

    >8.0

    抗壓強度

    Compression strength

    3

    MPa

    ≥12.0

    >13.5

    7

    MPa

    ≥22.0

    >23.0

    28

    MPa

    ≥42.5

    >50.0

    若用戶要求提供低堿水泥時,則水泥中堿含量小于0.6%

    特點

    低水化熱、早期強度高、堿含量低、干縮性小等特性。

    適用范圍

    國防、水庫、堤壩等較大面積工程

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