The Maturity Approach in Concrete Technology-Going Beyond Compressive Strength

R. Pinto, S. Hobbs, K. Hover
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引用次数: 3

Abstract

The maturity approach has been used conventionally to model temperature effects on the development of concrete compressive strength. Its application to concrete technology, however, goes far beyond simply estimating compressive strength. When the maturity approach is based on cement hydration kinetics, it can be applied to any concrete property related to the extent of cement hydration. In this study, the application of the maturity approach to model the development of various concrete properties was investigated. In addition to compressive strength, other properties evaluated included degree of hydration and ultrasonic pulse velocity. Hyperbolic equations were investigated for the development of each model. Different values of apparent activation energies were calculated according to the procedure in ASTM C 1074. It was concluded that activation energy is an indication of the thermal sensitivity of the concrete property investigated. The calculated value of activation energy depends on the specific property and the maturity model used.
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混凝土技术的成熟度法——超越抗压强度
成熟度法通常用于模拟温度对混凝土抗压强度发展的影响。然而,它在混凝土技术中的应用远远超出了简单地估计抗压强度。当成熟度法基于水泥水化动力学时,它可以应用于与水泥水化程度有关的任何混凝土性能。在本研究中,研究了成熟度法在混凝土各种性能发展模型中的应用。除抗压强度外,评估的其他性能包括水化程度和超声波脉冲速度。每个模型的发展都采用了双曲方程。根据ASTM C 1074的程序计算了不同的表观活化能值。结果表明,活化能是表征所研究混凝土性能的热敏性指标。活化能的计算值取决于具体的性质和所用的成熟度模型。
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