Flexural characterization of polymer concrete comprising waste marble and date palm fibers

Abstract

Three-point bending. Abstract This work is an experimental approach for the development and characterization of a polymer concrete reinforced with natural fibers. The polymer concrete consists of sand (Quartz) and orthophthalic polyester used as a binder. Marble powder was used to ensure the continuity of the particle size of the granular mixture. As reinforcement, 2% of chopped date palm fibers (short, very short or mixed) were added. For comparison, identical polymer concrete flexure specimens reinforced with the same content of short E-glass fibers were also prepared and tested. All specimens were initially cured at room temperature and then post-cured for 6 h at 70°C. The results of three-point bending on smooth specimens with different rates of charges (marble), showed that the flexural and compressive strength were improved by adding 20% of marble, and were 31.80 MPa and 67.42 MPa respectively. The flexural strength of specimens showed that the improvement or the degradation of polymer concrete properties seemed to be attributed to the nature of fibers (treated or untreated), and/or to the fibers sizing (short, very short or mixed).

Revealing the Chemical Profiles of Airborne Particulate Matter Sources in Lake Baikal Area: A Combination of Three Techniques

“…This factor was attributed to silicates, which are ubiquitous components of natural and anthropogenic aerosols [49]. The obtained profile was quite similar to those of quartz sands reported by Štyriaková et al (2009) [50] and by Rokbi and Baali [51] (Figure 5a).…”

“…Figure 5. Source profiles derived from the literature: (a) average IE composition of silicates reported by Štyriaková et al[50] and Rokbi and Baali[51], (b) IE composition of aluminosilicates reported by Bleam[52], (c) IE composition of traffic and industrial emissions reported by Amato et al[57], (d) average IE composition of snow, soil, and air PM in the vicinity of aluminum smelter reported by Boullemant[58] and Belozertseva[59].…”

Examining the bending test properties of bio-composites strengthened with fibers through a combination of experimental and modeling approaches

“…Utilizing a Universal Testing Machine (YL), a tool previously employed by other researchers, 35 flexural strength and modulus were determined. The tests were conducted with a consistent crosshead speed of 2.5 mm/min, using three samples in each instance, in accordance with the speed and sample quantity mentioned by those researchers.…”

Behavior of Concrete Reinforced with Date Palm Fibers

“…Taallah, Bachir, et al [29] investigated the mechanical and hygroscopicity characteristics of compressed earth blocks occupied by date palm fibers to ensure the use of local building materials and support for low-cost housing in rural areas. Rokbi M. et al [30] investigated developing and characterizing a polymer-reinforced concrete with date palm fibers. Their study used three sizes (short, very short, or mixed) of date palm fibers as a reinforcement.…”