Assessment of compressive strength and durability of silica fume‑based concrete in acidic environment

摘要

Although concrete utilization in the construction and building sectors is widespread in the world, the risk of concrete degradation, especially in harsh environments, still exists. This research deals with the impacts of adding silica fume (SF) into Portland cement on compressive strength and durability properties of concrete exposing to sulfuric acid. Three concrete grades C15, C25, and C45 were chosen with various percentages of SF. The effects of the curing environment (tap water and aggressive acid) on the compressive strength of 360 specimens were studied. Also, the losses of weight and compressive strength of the specimens were determined to assess the concrete resistance against acid attack. The result of this research revealed that a high water-cement ratio meaningfully influenced compressive strength and weight loss of concrete. SF improves the compressive strength and durability of SF-based concrete compared to the normal concrete at all ages.