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Purpose <p>Belitic calcium sulfoaluminate (BCSA) cement offers desirable properties, including fast setting times, rapid strength gain, high durability, and low carbon emissions. To apply BCSA cement in structures, its engineering properties must be well understood and accurate predictive equations are necessary.</p> Methods <p>This study measures compression strength, uniaxial stress–strain constitutive behavior, tensile splitting strength, and modulus of rupture for mixtures made with BCSA and Portland cement. Non-destructive testing (NDT) methods are of particular interest for fast-setting concrete, so ultrasonic pulse velocity, and dynamic resonance are also measured and discussed. Ten concrete mixtures provided a range of strengths, water cement ratios, and coarse aggregate types. The measured properties were evaluated at ages ranging from 4h to 6&#xa0;months. Concrete design code equations and empirically based models were compared with the results from 825 test samples.</p> Results <p>Compressive strength results ranged from 30 to 100&#xa0;MPa (4 to 14 ksi) for BCSA cement concrete. Modulus of elasticity for BCSA cement concrete can be predicted within 10% mean absolute percent error for several code equations. Although the tensile properties of BCSA cement concrete are more variable, some codes did still accurately estimate these properties. Historical models using NDT methods to estimate static properties are not adequate to be used for BCSA cement concrete, therefore, new empirically based equations are proposed to estimate elastic modulus.</p> Conclusion <p>The interaction of w/c and curing age is significantly different for BCSA and Portland cement. The modulus of elasticity and tensile properties of BCSA concrete differ from Portland cement concrete and while many code and literature relationships developed for Portland are adequate to apply to BCSA cement, this paper highlights areas for improvement and proposes new equations where appropriate.</p>

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Static and dynamic engineering properties of Belitic calcium sulfoaluminate cement concrete

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月1日

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  • Gabriel R. Johnson,
  • Cameron D. Murray,
  • Stacy G. Williams,
  • Robert J. Thomas

摘要

Purpose

Belitic calcium sulfoaluminate (BCSA) cement offers desirable properties, including fast setting times, rapid strength gain, high durability, and low carbon emissions. To apply BCSA cement in structures, its engineering properties must be well understood and accurate predictive equations are necessary.

Methods

This study measures compression strength, uniaxial stress–strain constitutive behavior, tensile splitting strength, and modulus of rupture for mixtures made with BCSA and Portland cement. Non-destructive testing (NDT) methods are of particular interest for fast-setting concrete, so ultrasonic pulse velocity, and dynamic resonance are also measured and discussed. Ten concrete mixtures provided a range of strengths, water cement ratios, and coarse aggregate types. The measured properties were evaluated at ages ranging from 4h to 6 months. Concrete design code equations and empirically based models were compared with the results from 825 test samples.

Results

Compressive strength results ranged from 30 to 100 MPa (4 to 14 ksi) for BCSA cement concrete. Modulus of elasticity for BCSA cement concrete can be predicted within 10% mean absolute percent error for several code equations. Although the tensile properties of BCSA cement concrete are more variable, some codes did still accurately estimate these properties. Historical models using NDT methods to estimate static properties are not adequate to be used for BCSA cement concrete, therefore, new empirically based equations are proposed to estimate elastic modulus.

Conclusion

The interaction of w/c and curing age is significantly different for BCSA and Portland cement. The modulus of elasticity and tensile properties of BCSA concrete differ from Portland cement concrete and while many code and literature relationships developed for Portland are adequate to apply to BCSA cement, this paper highlights areas for improvement and proposes new equations where appropriate.