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Composite 42.5 Cement
Products

Composite 42.5 Cement

Our Composite 42.5 Cement is a high-strength, high-performance building material developed for large-scale construction projects, mainly used in concrete mixing plants, cement precast products such as floor slabs, pipe piles, beams and columns, and other scenarios that require high strength and durability. With advanced production equipment and professional R&D team, we have optimized the formula of Composite 42.5 Cement to make it have excellent mechanical properties and engineering adaptability, and become the preferred material for large-scale construction and precast product production.

This composite cement has high compressive strength and flexural strength, which can meet the strength requirements of various large-scale concrete structures. When used in concrete mixing plants, it can be mixed with aggregates, admixtures and other materials to produce high-quality concrete, which is widely used in the construction of bridges, roads, high-rise buildings, factories and other projects. For cement precast products such as floor slabs and pipe piles, it has good fluidity and moldability, which can ensure the precision and quality of precast products, improve production efficiency, and reduce production costs.

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    Introduction
    Product Introduction
    MANUFACTURING

    In addition to high strength, our Composite 42.5 Cement also has excellent durability, frost resistance, impermeability and corrosion resistance. It can adapt to various harsh construction environments, such as high temperature, low temperature, humidity and other areas, and extend the service life of the project. Its reasonable composite formula not only improves the performance of the cement, but also reduces the consumption of raw materials, which is more environmentally friendly and energy-saving, in line with the development trend of modern construction industry.

    MANUFACTURING

    We have a complete quality inspection system, from raw material selection to production, packaging and transportation, every link is strictly inspected to ensure that the Composite 42.5 Cement delivered to customers is of stable quality and reliable performance. Whether you are a concrete mixing plant, a precast product manufacturer or a large construction enterprise, we can provide you with customized solutions and stable supply services to help you improve project quality and enhance market competitiveness.

    SPECIFICATIONS

    Composite 42.5 Cement

    No.

    Test Item

    Unit

    Standard Requirement

    Test Result

    Individual Judgment

    1

    Fineness (80μm Sieve Residue)

    %

    ≤8.0

    5.6

    Qualified

    2

    Initial Setting Time

    min

    ≥45

    168

    Qualified

    3

    Final Setting Time

    h

    ≤10.0

    4.2

    Qualified

    4

    Soundness (Le Chatelier Method)

    mm

    ≤5.0

    1.8

    Qualified

    5

    3-day Compressive Strength

    MPa

    ≥17.0

    21.5

    Qualified

    6

    28-day Compressive Strength

    MPa

    ≥42.5

    48.9

    Qualified

    7

    3-day Flexural Strength

    MPa

    ≥3.5

    4.1

    Qualified

    8

    28-day Flexural Strength

    MPa

    ≥6.5

    7.3

    Qualified

    9

    Loss on Ignition

    %

    ≤4.0

    3.2

    Qualified

    10

    Sulfur Trioxide (SO₃)

    %

    ≤3.0

    2.5

    Qualified

    PERFORMANCE

    Supplementary Indicators of Composite 42.5 Cement

    No.

    Test Item

    Unit

    Standard Requirement

    Test Result

    Individual Judgment

    1

    Bulk Density

    kg/m³

    ≥1300

    1380

    Qualified

    2

    Water Retention Rate

    %

    ≥80

    85

    Qualified

    3

    Frost Resistance (25 Freeze-Thaw Cycles)

    -

    Mass Loss ≤5%, Strength Loss ≤25%

    Mass Loss 2.1%, Strength Loss 8.5%

    Qualified

    4

    Impermeability

    MPa

    ≥P8

    P10

    Qualified

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