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The Maturity Approach for Predicting Different Properties of High-Performance Concrete

机译:预测高性能混凝土不同性能的成熟度方法

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摘要

The prediction of concrete properties using computer modeling is becoming widely used, and many models utilize the concept of maturity. The original maturity concept was developed empirically from the study of the temperature effect on the compressive strength of normal-strength concrete. The use of the maturity concept for estimating the development of properties other than compressive strength has not yet been sufficiently validated with experimental data, especially for high-performance concrete. This paper presents a study of the maturity method for predicting the development of key properties of high-performance concrete, such as compressive strength, splitting tensile strength, modulus of elasticity, and level of cement hydration. The derivation of the maturity method is explained and experimental evidence, collected under different temperature conditions, is presented and discussed. The results were used to study the activation energy, which is a governing parameter of the Arrhenius maturity formulation, for predicting the key properties of high-performance concrete. Recognizing the need for a more accurate determination of the activation energy for each concrete property, a new practical approach for calculating the Arrhenius maturity index is proposed.
机译:使用计算机建模来预测混凝土性能正变得越来越广泛,许多模型都利用了成熟度的概念。最初的成熟度概念是通过研究温度对普通强度混凝土抗压强度的影响而得出的。成熟度概念用于评估抗压强度以外性能的发展尚未得到实验数据的充分验证,尤其是对于高性能混凝土。本文介绍了一种用于预测高性能混凝土关键性能(例如抗压强度,劈裂抗拉强度,弹性模量和水泥水化程度)发展的成熟度方法的研究。解释了成熟度方法的推导,并介绍和讨论了在不同温度条件下收集的实验证据。该结果用于研究活化能,该活化能是阿累尼乌斯成熟配方的控制参数,用于预测高性能混凝土的关键性能。认识到需要更准确地确定每种混凝土性能的活化能,提出了一种计算Arrhenius成熟度指数的新实用方法。

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