Self-compacting steel fibers reinforced geopolymer: Study on mechanical properties and durability against acid and chloride attacks

Fresh Properties, Strength, and Durability of Fiber-Reinforced Geopolymer and Conventional Concrete: A Review

“…In the same study, when 0.25% polypropylene fiber volume fraction was combined with 2% steel fiber volume fraction, the slump value dropped further to 120 mm [ 12 ]. Similarly, Sukontasukkulet [ 17 ] reported a decrease in slump flow diameter of alkali-activated concrete consisting of 80% slag and 20% fly ash binders when the volume fraction of hooked steel fibers was increased from 0.5% to 1%. This reduction was attributed to the increased surface area created by the steel fibers, which requires a larger amount of water to maintain concrete flow [ 17 ].…”

“…Several studies evaluated the fresh properties and rheology of fiber-reinforced mortars and concretes, highlighting the key factors that influence their workability/flowability [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 32 , 34 , 35 , 36 , 61 , 68 , 83 , 84 ].…”

“…Concrete with long T50 time is also susceptible to segregation and pumpability issues, similar to concrete with very low T50 time. Sukontasukkul [ 17 ] reported that self-compacting concrete with less than 1% hooked-end steel fiber content exhibited a T50 time less than 2 s, which falls below the lower limit of the recommended ENFARC range. A hooked-end steel fiber content of 1.5% resulted in self-consolidating concrete with adequate T50 time within the recommended ENFARC range [ 17 ].…”

“…The average space between fibers decreases as the fiber content increases, thereby limiting the initiation and propagation of cracks within the matrix. Steel fibers are the most investigated in terms of the effect on mechanical properties of concrete [ 7 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. They generally create a stronger bond with the matrix, leading to higher flexural and tensile performances compared to other types of fibers.…”

A Study on the Effect of Steel Fibres on the Properties of Concrete – A Review

“…The presence of steel fibre reduced concrete cracks by interconnecting the voids within it (Ramakrishnan et al, 2022). Concerning chloride migration, incorporating fibre volumes between 0.5% and 1.5% resulted in a beneficial impact, reducing the depth of chloride penetration from 6.34 to 4.75 mm (Sukontasukkul et al, 2023). The resistance of concrete to chloride-ion penetration when using microfibers is primarily associated with the volume fraction of the fibres.…”