Performance of Fly Ash Concrete with Nickel Slag Fine Aggregate in the Marine Environment

This research aims to assess the feasibility of the mechanical strength and the durability of the concrete containing ۵۰% nickel slag and a combination of ۱۵% and ۳۰% fly ash with a water-cement ratio of ۰.۲۵ and ۰.۴۵ in a marine environment. Four types of concrete, namely OPC-sand (C) as control concrete, OPC-۵۰GNS (S), ۱۵FA-۵۰GNS (F۱), and ۳۰FA-۵۰GNS (F۲) as comparison concrete, were tested with a ۱۰۰×۲۰۰ mm cylindrical specimen. The results showed an increase in the mechanical strength and potential resistance of the comparison concrete at the age of ۲۸ days. While at the age of ۱۸۰ days, fluctuating changes were found. The compressive strength of S concrete increased by ۳۶.۹ and ۹.۳% respectively, F۱ concrete by ۳۷.۷% and ۱.۷%, F۲ by ۳۳.۷% and ۵.۹% at ratio ۰.۴۵ and ۰.۲۵. Likewise, the value of the split tensile strength and modulus of elasticity of concrete. This result was followed by reduced porosity, sorptivity, and chloride penetration resistance as an indication of better concrete durability. Fly ash appears to have a greater positive impact on potential durability than mechanical strength at a water cement ratio of ۰.۲۵ versus ۰.۴۵. Although the chloride penetration resistance is decent, the compressive strength of concrete with a water-cement ratio of ۰.۴۵ does not qualify for application in the marine environment. In contrast, concrete with a water-cement ratio of ۰.۲۵ containing ۵۰% nickel slag and the addition of class C fly ash up to ۳۰% was declared suitable for application to concrete in the marine environment zone C۲ according to ACI ۳۱۸-۱۹. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۲-۰۸-۱۲-۰۱۰ Full Text: PDF

کلیدواژه ها:

Concrete Performance ، Nickel Slag ، Fly Ash ، Marine Environment.