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<p>The effects of acrylic latex and Polyamide 6.6 fiber additives on impermeability and flexural strength in self-compacting mortar (SCM) were investigated. A total of 12 different mortar mixtures, in addition to a control mixture, were prepared. The latex additive was incorporated in the range of 1–7&#xa0;kg/m³, while the fiber additive was used in the range of 0.1–0.5&#xa0;kg/m³. In addition, four hybrid mixtures containing a fixed dosage of 2&#xa0;kg/m³ latex combined with varying fiber contents were produced. The selected latex content of 2&#xa0;kg/m³ was not intended as an optimized dosage but was chosen as an intermediate level between 1 and 3&#xa0;kg/m³ to evaluate the combined effect of latex and fibers while avoiding the strength reductions observed at higher latex contents. The investigated latex-to-cement ratio ranged between 0.17% and 1.17% by mass of cement. Fresh-state performance was evaluated using flowability measurements, while hardened-state properties were assessed in terms of density, porosity, compressive strength, flexural strength, and splitting tensile strength. Durability performance was evaluated through water absorption, abrasion resistance, and elevated-temperature exposure tests at 300, 600, and 900&#xa0;°C. The results indicated that latex addition contributed to a reduction in porosity, while the combination of latex and fibers resulted in the lowest porosity values. Fiber reinforcement generally improved flexural and tensile strength, whereas latex incorporation tended to slightly reduce mechanical strength. At elevated temperatures, fiber-containing mixtures generally showed better residual strength compared to the reference mixtures, while latex-containing mixtures exhibited more pronounced strength reductions at higher temperatures. Water absorption and abrasion results indicated that hybrid systems exhibited improved performance in terms of reduced water uptake and enhanced surface resistance. Overall, the findings suggest that self-compacting mortars incorporating acrylic latex and Polyamide 6.6 fibers exhibit enhanced durability performance, improved fresh-state behavior, and balanced mechanical properties suitable for repair and rehabilitation applications.</p>

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Evaluation of the Physical, Mechanical, and Durability Properties of Latex Dispersion and Polyamide Fiber-Reinforced Mortars Under Temperature Effects

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Selçuk Selami Sarıcı,
  • Serkan Etli,
  • Betül Paköz

摘要

The effects of acrylic latex and Polyamide 6.6 fiber additives on impermeability and flexural strength in self-compacting mortar (SCM) were investigated. A total of 12 different mortar mixtures, in addition to a control mixture, were prepared. The latex additive was incorporated in the range of 1–7 kg/m³, while the fiber additive was used in the range of 0.1–0.5 kg/m³. In addition, four hybrid mixtures containing a fixed dosage of 2 kg/m³ latex combined with varying fiber contents were produced. The selected latex content of 2 kg/m³ was not intended as an optimized dosage but was chosen as an intermediate level between 1 and 3 kg/m³ to evaluate the combined effect of latex and fibers while avoiding the strength reductions observed at higher latex contents. The investigated latex-to-cement ratio ranged between 0.17% and 1.17% by mass of cement. Fresh-state performance was evaluated using flowability measurements, while hardened-state properties were assessed in terms of density, porosity, compressive strength, flexural strength, and splitting tensile strength. Durability performance was evaluated through water absorption, abrasion resistance, and elevated-temperature exposure tests at 300, 600, and 900 °C. The results indicated that latex addition contributed to a reduction in porosity, while the combination of latex and fibers resulted in the lowest porosity values. Fiber reinforcement generally improved flexural and tensile strength, whereas latex incorporation tended to slightly reduce mechanical strength. At elevated temperatures, fiber-containing mixtures generally showed better residual strength compared to the reference mixtures, while latex-containing mixtures exhibited more pronounced strength reductions at higher temperatures. Water absorption and abrasion results indicated that hybrid systems exhibited improved performance in terms of reduced water uptake and enhanced surface resistance. Overall, the findings suggest that self-compacting mortars incorporating acrylic latex and Polyamide 6.6 fibers exhibit enhanced durability performance, improved fresh-state behavior, and balanced mechanical properties suitable for repair and rehabilitation applications.