Effect of natural pozzolan content on the properties o engineered cementitious composites as repair material
Effect of natural pozzolan content on the properties o engineered cementitious composites as repair material作者机构：Geomaterials Laboratory Civil Engineering Department University Hassiba Benbouali of Chlef BP 151 Chief02000 Algeria
出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)
年 卷 期：2018年第12卷第3期
页 面：261-269页
核心收录：
学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学]
主 题：natural pozzolan engineered cementitious composites mechanical strengths elastic modulus capillary absorption drying shrinkage
摘 要：In order to determine the effect of Natural Pozzolan （NP） content on the mechanical properties and durability characteristics on Engineered Cementitious Composites （ECC） as repair material. This study focused on the evaluation of the most factors influencing compatibility between the repair material and the base concrete including mechanicals properties such as, compressive and flexural strengths, elastic modulus, capillary absorption and drying shrinkage. The experimental results showed that natural pozzolan reduces the compressive strength and the flexuraI strength of ECC at all ages. The elastic modulus of ECC was remarkably lower than that of normal-strength concrete. This lower ~oung＇s modulus is desirable for repair concrete, because it prevents the stresses induced by restrained shrinkage. In addition, the incorporation of high-volume natural pozzolan decreases significantly the coefficient of capillary absorption at long term and increases the drying shrinkage. Generally, based on the results obtained in the present experimental investigation, ECC can be used effectively as an overlay material over existing parent concrete.
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