Concrete Durability: Linking Material Properties and Field Performance

混凝土是世界上使用最广泛的建筑材料，但往往是不了解和设计不当，导致过早恶化，在许多积极的暴露条件。申请人的研究计划旨在对不同环境中可能发生的劣化过程进行基本了解，确定适当的材料特性以抵抗破坏力，量化和预测劣化速率，并通过现场性能研究验证实验观察结果。正在进行的研究计划的主要重点是继续开发和改进适当的测试方法和预测模型，以评估混凝土对一些更普遍的劣化形式的抵抗力;这些劣化形式是：（i）氯化物侵入和钢筋腐蚀，（ii）碱-硅反应，（iii）硫酸盐侵蚀，以及（iv）ASR和冻融相结合。该研究计划的主要目标是：

Concrete is the most widely-used construction material in the world but is often poorly understood and inadequately designed leading to premature deterioration in many aggressive exposure conditions. The applicant's research program is aimed at developing a fundamental understanding of the deterioration processes that can occur in different environments, determining the appropriate material properties to resist the destructive forces, quantifying and predicting rates of deterioration, and validating experimental observations with field performance studies. The main focus of the ongoing research program is to continue the development and improvement of appropriate test methods and predictive models for evaluating concrete's resistance to some of the more prevalent forms of deterioration; these are: (i) chloride ingress and corrosion of steel, (ii) alkali-silica reaction, (iii) sulfate attack, and (iv) combined ASR and freeze-thaw. The main objectives of the research program are: