Experimental Study on Durability Properties of Densified Small Particles Based Concrete

Existing masonry structures can be strengthened and renovated to increase safety, extend service life, and save huge expenses by using high strength cement based composite materials. The most common material used in construction is concrete. The main difference between ordinary concrete and high-performance concrete is the use of chemical and mineral admixtures. Micro-silica particles and additional superplasticizers are added to concrete to create “high performance densified small particles-based concrete” (HPDSPC). It provides enough filling and strong structural support. In general, adding fibers to concrete increases the fiber's tensile strain, which enhances the composites’ ability to absorb energy, ductility, and cracking behavior in addition to their durability. This paper describes an examination on the durability characteristics of grade M70 concrete based on densified small particles with straight steel fibers covered in brass. On HPDSPC mix containing 0% and 9% steel fibers, durability tests including acid resistance, alkaline resistance, chlorides resistance, fast chloride penetration, and water absorption were carried out for 28, 56, and 90 days. Based on the obtained data, the HPDSPC mix with 9% fibers has greater durability attributes than the HPDSPC mix without fibers. Applications of HPDSPC have been shown with a focus on piers, slabs, beams, and columns made of masonry.