Properties of Fiber-Reinforced Structural and Non-Structural Ultra Lightweight Aggregate Concrete

Behnam, Bashar; Alfraihat, Ahamad

doi:10.15866/irece.v10i5.16971

Cited by 3 publications

(2 citation statements)

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“…and synthetic short fibers, such polyvinyl alcohol (PVA) or polypropylene (PP) fibers. LWA-to-cementitious materials (cm) ratio, by weight, ranges between 0.40 and 0.65, while water-to-cementitious material ratio (w/cm) ranges between 0.25 and 0.5 [4,18]. Due to low specific gravity of engineered LWA, SULWECC has low-to-medium workability [19].…”

Section: Sulweccmentioning

confidence: 99%

Flexural Resistance Factors for Structural Ultra Lightweight Engineered Cementitious Composite Slabs

Behnam¹,

Al-Iessa²

2021

cea

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Many problems associated with the use of normal weight concrete have been solved with the development of structural ultra-lightweight engineered cementitious composite (SULWECC) that has the capability to exhibit strain-hardening behavior prior to failure. However, the feasibility and standards that address the design of such engineered cementitious composites (ECC) in flexural slab systems are not available. In this study, reliability analysis and calibration process are carried out on three different SULWECC slab systems with the intention of estimating the potential flexural resistance factors. Although the high volume of randomly dispersed synthetic short fiber is considered the main reinforcement, SULWECC slab systems internally reinforced with carbon FRP mesh are also considered. The reinforcement ratio is selected so that the section is under-reinforced. Relevant load and resistance random variables are used, and appropriate statistical parameters are selected. The target reliability indices are chosen to be consistent with those used to develop current design code specifications. The nominal moment capacity is calculated based on a new model that consists of: elastic linear stress distribution in the compression zone and elastic-perfectly-plastic uniform stress distribution in the tension zone. The determined flexural resistance factors ranged from 0.59 to 0.69, although higher values are justifiable in special circumstances. The average slab thickness needed to satisfy the strength requirements ranged from 1/37 to 1/22 times the slab length. Flexural toughness to measure ductility is evaluated using load-deflection curves of experimentally tested SULWECC specimens.

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Section: Sulweccmentioning

confidence: 99%

Flexural Resistance Factors for Structural Ultra Lightweight Engineered Cementitious Composite Slabs

Behnam¹,

Al-Iessa²

2021

cea

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“…owadays, the addition of fibers to a cement matrix is a technique to be explored in the field of polymer reinforced materials [1][2][3][4]. In the construction and civil engineering sector, these composites are distinguished from other composite materials intended for industry and transport, by the variety of types of matrices and fibers, as well as by the different types of additions (mineral particles, synthetic powders or chemical agents), making a wide range of combinations or mixtures possible.…”

Section: Introductionmentioning

confidence: 99%

The effect of using polypropylene fibers on the durability and fire resistance of concrete

Suiffi¹,

Maliki²,

Farajian

et al. 2021

Frattura Ed Integrità Strutturale

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In order to study the effect of polypropylene fibers on the durability of cementitious composites, several experimental tests have been carried out in the laboratory. The composite was tested with different volume fractions of polypropylene fibers (0.05%, 0.10%, 0.30% and 0.50%). All the results relating to the indicators (porosity accessible to water εb, to the oxygen permeability Kapp.gas and diffusivity Dns) indicate that the addition of polypropylene fibers in a cement matrix represents only a small effect on durability. This panel of general sustainability indicators can be supplemented by indicators more specific to each degradation process identified or envisaged depending on the environmental conditions of the structure. However, the addition of the volume fraction of polypropylene fibers (0.50%) in a cementitious composite, increases fire resistance. Such behavior gives fiber composites interesting properties which favor their use in structures exposed to fire risks.

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Study of the durability of concrete mixed with polypropylene fibers

Suiffi¹,

Maliki²,

Cherkaoui

et al. 2021

Procedia Structural Integrity

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Properties of Fiber-Reinforced Structural and Non-Structural Ultra Lightweight Aggregate Concrete

Cited by 3 publications

References 0 publications

Flexural Resistance Factors for Structural Ultra Lightweight Engineered Cementitious Composite Slabs

Flexural Resistance Factors for Structural Ultra Lightweight Engineered Cementitious Composite Slabs

The effect of using polypropylene fibers on the durability and fire resistance of concrete

Study of the durability of concrete mixed with polypropylene fibers

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