An experimental investigation into the characteristics and performance of reactive powder concrete to choose the ideal mix

Abstract

reactive Powder Concrete (RPC) originated in the early 1990s as a cutting-edge concrete material renowned for its outstanding strength, durability, and ductility. Its remarkable durability attributes stem from a low water-cement ratio, high density, and elevated strength. With high ductility, RPC exhibits significant deformation capabilities before reaching failure. Additionally, its low porosity contributes to reduced material permeability, enhancing resistance against chemical attack and water infiltration. The primary goal of this experimental investigation is to choose an ideal mix for reactive powder concrete after implementing several experimental mixes based on mixing ratios implemented during previous studies to choose the optimal mix. Subsequently, the chosen mixture underwent testing at 7 days to assess its behavior and mechanical properties, utilizing six standard cylindrical specimens (10*20) cm and six cubes (15*15) cm. The results demonstrated a substantial increase in the ultimate compressive strength of the (RPC) specimen by 72% compared to the Normal Concrete (NC) specimen. Moreover, the tensile strength of the RPC exhibited a 35.4% increase compared to the (NC) specimen. The stress-strain analysis indicated a remarkable 118% increase in the (RPC) specimen's maximum stress compared to the (NC) counterpart. In contrast, the strain values for ordinary concrete rose by 22.5% at the point of maximum stress compared to the RPC specimen. Specifically, the tensile stress of the (RPC) specimen increased by 10% compared to the (NC), accompanied by a 29% uptick in tensile strain for the RPC specimen at the point of maximum stress. Furthermore, the (RPC) specimen demonstrated a 38.2% increase in the Modulus of Elasticity and a 35.7% increase in Poisson's ratio compared to the (NC) specimen.