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Impact of Different Curing Techniques on Some Mechanical Properties of Self-Compacting Concrete Containing Silica Fume


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DOI: https://doi.org/10.15866/irece.v13i3.21494

Abstract


The employment of self-compacting concrete SCC has extended worldwide due to its many advantages for the concrete production technology. On the other hand, the use of self-curing technique minimizes the consummation of curing water, which is an important issue especially in the areas with water scarcity. Therefore, the aim of this study is to use self-curing method with SCC. Firstly, the goal is to investigate the effect of cement replacement percentage with silica fume on some fresh and hardened properties of SCC and to specify the optimum one. For this purpose, mixes with four different percentages of silica fume (0%, 5%, 10%, 15%) have been considered. Secondly, the effect of applying self-curing using water soluble polyvinyl alcohol PVA in comparison with water curing and sealed curing on the mechanical properties of SCC has been investigated. For this goal the compressive, splitting tensile, and flexural tensile strengths of hardened SCC have been studied for the above mixes and for the three curing methods and two curing periods 28 and 60 days. The results show that the optimal percentage for silica fume that leads to maximum strength properties is 10% for all the curing techniques and periods. Furthermore, all the SCC mixes cured in water always give the highest strength values followed by those self-cured. Another important finding is that the self-curing using PVA shows an interesting result since it provides strength values close to the ones obtained from using water curing with a strength reduction less than 3% at age 28 days for the case of 10% silica fume.
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Keywords


Compressive Strength; Curing Techniques; Flexural Strength; Polyvinyl Alcohol; Self-Compacting Concrete; Self-Curing; Silica Fume; Splitting Tensile Strength

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