Flexural Performance of Sisal Fiber Reinforced Foamed Concrete under Static and Fatigue Loading

Abstract

To improve the weak mechanical properties of the foamed concrete that resulted from a large number of pores, a plant fiber is used as fill with the matrix. In this study, five contents of sisal fiber are added into the foamed concrete to investigate the static and fatigue performance of composites. The static and fatigue experimental results show that the sisal fiber can improve the mechanical properties of the foamed concrete. When the content of sisal fiber is less than 0.15%, the higher the content of sisal fiber, the greater the bending strength and fatigue life of the foamed concrete. In contrast, if the sisal fiber content is larger than 0.15%, the bending strength and fatigue life decrease with the increasing fiber content. From the regression analyses, the results show that the double linear relationships exist not only between the sisal fiber content and the flexural strength, but also between the sisal fiber content and the fatigue life of the foamed concrete. In this study, the optimal content of sisal fiber mixed in the foamed concrete can be inferred to be 0.133%.

Concrete Reinforced with Sisal Fibers (SSF): Overview of Mechanical and Physical Properties

“…Average fatigue lifetimes of precracked FRC specimens were in the order of 10 cycles for loads between 10% and 90% of static strength, 8000 cycles for a load range between 10% and 80%, and more than 2.7 × l06 cycles or a load range between 10% and 70% [107]. According to the findings of fatigue tests [108], sisal fiber may lengthen the fatigue life of foamed concrete. When the sisal fiber percentage is less than 0.15 percent, the stronger the concrete is when the sisal fiber content is greater.…”

Experimental and Numerical Verification of the Railway Track Substructure with Innovative Thermal Insulation Materials

“…Wongkvanklom et al [ 74 ] investigated the impact of foam content on mechanical, thermal, and sound properties of foamed concrete made with 15 M NaOH solution, sodium silicate/NaOH ratio (NS/NaOH) of 1.00, sand/ash ratio of 1.25, liquid/fly ash ratio of 0.4. Similarly to ordinary concrete, there is a possibility of cracking [ 75 ] under the influence of the acting load (low tensile strength) and, as a result, the need to strengthen, e.g., by using fibers [ 76 , 77 , 78 , 79 , 80 ], CFRP [ 79 ], or mesh [ 80 ]. Moreover, in recent years, FC has been used extensively in various areas of construction around the world, such as in Germany, Great Britain, USA, Canada, and Brazil [ 81 , 82 , 83 ].…”

Engineering Properties and Applications of Air-Foamed Lightweight Soil

“…e addition of fibers is the most effective way of improving the flexural strength of air-foamed lightweight soil [106]. e addition of 0.15% sisal fiber can increase the flexural strength of air-foamed lightweight soil by 29% [107] because the crack localization is limited and ductility is improved after the addition of fiber-reinforced materials [50]. In terms of fibers used, polypropylene fiber has been applied more extensively [108][109][110].…”