Using equal cross-section theory to investigate bending properties of cellulosic fiber reinforced cement panels

Abstract

Cellulosic fibers, which are widely available in Iran, can be used as convenient materials for cement panel matrix reinforcing with respect to adequate mix design. This paper at the first stage presents a simple model for predicting the fiber reinforced cement panel behavior during flexural loads by implementing ''Equal Cross-section Theory''. At the second stage, experimental study was carried out to validate the proposed theory. In order to do the experiment, different types of cellulosic fibers were used as cement replacement of 1% by weight. In addition, to solve the problem of swelling of cellulosic fibers within cement matrixes, fibers were treated by UV/ozone and coated with sodium silicate. Compressive strength, flexural strength and density of cement composite samples were investigated in terms of different cellulosic fiber types including viscose, Leafiran, milkweed and hemp and the sodium silicate consumption amount. The results revealed that the use of cellulosic fibers diminished the density and compressive strength of the cement panel specimens. Improvement of flexural strength was only achieved by adding the hemp fibers into the cement panels which showed a good agreement with ''Equal Cross-section Theory'' outputs. Moreover, the reductions in the compressive and flexural strength of cement panels contained sodium silicate were much smaller than the cement panels with uncoated fibers.

Reinforced cementitious composite using viscose rayon fiber from textile industry waste

“…These data were also in compliance with other studies with similar textile synthetic and recycled fibers, which showed that 0.5% of fibrous reinforcement is efficient for increasing mechanical properties. 39,64 On the other hand, addition above 1 wt% decreased the mechanical properties of cementitious composites reinforced with cellulose fibers as mentioned by Ghasaei et al 65…”

“…These data were also in compliance with other studies with similar textile synthetic and recycled fibers, which showed that 0.5% of fibrous reinforcement is efficient for increasing mechanical properties. 39,64 On the other hand, addition above 1 wt% decreased the mechanical properties of cementitious composites reinforced with cellulose fibers as mentioned by Ghasaei et al 65 From Figure 7, it is observed that, in fact, samples that achieved the lowest compressive strength (FRC1, FRC2, and FRC4) had black areas in their structures, representing air voids, and agglomerated fiber points. In addition, fibers distributed in the cementitious matrix were observed, with the presence of pores.…”

Effect of glass and polypropylene fibers in cementitious composites containing waste stone powder

“…A f is the whole fibers occupied cross-section. Therefore, new moment I new of inertia can be calculated by formula [22]…”

Structural Characteristics and Sound Absorption Properties of Waste Hemp Fiber

“…With roughly 80% of the USD 1.7 billion global hemp textile market in 2019, China controlled the textile industry [13]. Hemp is a versatile crop used in a variety of products, including building materials, textile products, paper, foodstuffs, furniture, luxury markets, cosmetic products, and hygiene items, while the textile sector generally processes industrial hemp into fibers, fabrics, ropes, yarns, and home textiles [14][15][16]. The percentage of short fibers in hemp fiber is about 7.72%, and these short fibers are eliminated in the form of waste in the manufacture of hemp yarn and fabric, resulting in a waste of resources [17,18].…”