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<p>In this study, the influences of prewetted polypropylene fibres (PFs), basalt fibres (BFs), cellulose fibres (CFs), prewetted natural lightweight tuff aggregates (LTAs), artificial lightweight expanded clay aggregates (LECAs), and recycled brick aggregates (RBAs) on the early autogenous shrinkage and compressive strength of high-strength concrete (HSC) were investigated. Statistical analysis of variance (ANOVA) revealed a statistically significant difference between the reference concrete and some of the investigated concretes with prewetted materials. Among the prewetted fibres, PFs reduced autogenous shrinkage by 70% after one day and maintained the compressive strength at 96% after 28&#xa0;days. Among the porous prewetted aggregates, LECAs (0–2&#xa0;mm) were the most effective, reducing autogenous shrinkage by 97% and maintaining compressive strength at 107%.</p>

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Effectiveness of Prewetted Fibres and Aggregates in Mitigating the Autogenous Shrinkage of High-Strength Concrete at an Early Age

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月17日

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  • Drago Saje

摘要

In this study, the influences of prewetted polypropylene fibres (PFs), basalt fibres (BFs), cellulose fibres (CFs), prewetted natural lightweight tuff aggregates (LTAs), artificial lightweight expanded clay aggregates (LECAs), and recycled brick aggregates (RBAs) on the early autogenous shrinkage and compressive strength of high-strength concrete (HSC) were investigated. Statistical analysis of variance (ANOVA) revealed a statistically significant difference between the reference concrete and some of the investigated concretes with prewetted materials. Among the prewetted fibres, PFs reduced autogenous shrinkage by 70% after one day and maintained the compressive strength at 96% after 28 days. Among the porous prewetted aggregates, LECAs (0–2 mm) were the most effective, reducing autogenous shrinkage by 97% and maintaining compressive strength at 107%.