PERFORMANCE EVALUATION OF HYDROPHOBIC CONCRETE USING SILICONE OIL EMULSION
DOI:
https://doi.org/10.11113/mjce.v38.26454Keywords:
Hydrophobic concrete, Silicone oil emulsion, Mechanical properties, Modulus of elasticity, Stress-strain behavior, Sustainable concrete.Abstract
The hydrophobic modification of concrete using internal admixtures has attracted considerable research interest, as such treatments can influence the internal characteristics of concrete and consequently affect its mechanical performance. In this study, the mechanical behaviour of hydrophobic concrete incorporating silicone oil emulsion as an admixture was experimentally evaluated. M30 grade concrete mixes were prepared with different dosages of silicone oil emulsion (0%, 0.5%, 1%, and 3% by weight of cement). The influence of silicone oil emulsion on workability, compressive strength, split tensile strength, flexural strength, and stress–strain behaviour was investigated at different curing ages. Stress–strain analysis was carried out to evaluate stiffness, peak stress, deformation characteristics, and elastic response. Compared with the control mix, the incorporation of silicone oil emulsion at moderate dosages (0.5–1%) improved the overall mechanical performance of concrete, resulting in higher strength and a favorable stress–strain response. Among the investigated mixtures, the 0.5% silicone oil emulsion mix exhibited the most balanced performance, with higher strength, controlled deformation, and satisfactory stiffness characteristics. However, the 3% dosage resulted in a reduction in strength and stiffness compared with the lower dosages. The results indicate that silicone oil emulsion can be used as a functional admixture to enhance the mechanical performance of concrete while supporting the development of more durable and sustainable construction materials
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