Mechanical and durability properties of steel, polypropylene and polyamide fiber reinforced slag-based alkali-activated concrete

Kuranlı, Ömer Faruk; Uysal, Mücteba; Abbas, Mele Tidjani; Çoşgun, Turgay; Niş, Anıl; Aygörmez, Yurdakul; Canpolat, Orhan; Al-mashhadani, Mukhallad M.

doi:10.1080/19648189.2022.2031302

Cited by 10 publications

(2 citation statements)

References 41 publications

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“…The literature review shows that polyethylene terephthalate (PET), high-density polyethylene (HDPE), polyvinyl chloride (PVC), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS) and rubber waste [19,[41][42][43] were most often used to produce cement mortars and concretes. There are significantly fewer reports on the use of other polymer materials, including polyamide, although this material was used both as waste and as a clean, synthesized fiber [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61]. Polyamide waste [44][45][46][47][48][49] was used both for the production of cement mortars and concretes.…”

Section: Introductionmentioning

confidence: 99%

Cement Mortars Based on Polyamide Waste Modified with Fly Ash from Biomass Combustion—A New Material for Sustainable Construction

Ulewicz,

Jura,

Gnatowski

2024

Sustainability

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The article presents an analysis of the possibility of using the waste of polyamide 6 modified with fly ash (in the amount of 5, 10 and 15%) from the burning of wood–palm kernel shells biomass as an addition to cement mortar. Fly ash from the burning of biomass in a circulating fluidized bed boiler (which currently has no practical use) was first used to produce polyamide 6, and then post-production polymer waste (added at 20, 40 and 60%) was used to produce ecological mortar. The use of this type of waste is both economically profitable and desirable due to the need to implement waste material management processes in a closed circuit. The addition of polyamide 6 waste containing 5% fly ash in amounts of 20 and 40% and waste containing 10% ash in 20% to cement mortars improves their mechanical properties. The compressive strength of cement mortars (after 28 days of maturation) containing 20 and 40% of polyamide waste containing 5% fly ash increases by 6.6 and 4.6%, respectively, and the flexural strength by 4.9 and 3.4% compared to the control mortars. However, the compressive strength of mortars with the addition of 20% polyamide waste containing 10% fly ash increases by 4.2% and the flexural strength by 3.7%. Cement mortars modified with waste are characterized by slightly lower water absorption and mechanical strength after the freezing–thawing process (frost resistance) compared to control mortars and do not have an adverse effect on the environment in terms of leaching metal ions.

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Section: Introductionmentioning

confidence: 99%

Cement Mortars Based on Polyamide Waste Modified with Fly Ash from Biomass Combustion—A New Material for Sustainable Construction

Ulewicz,

Jura,

Gnatowski

2024

Sustainability

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“…This can reduce the entry of environmental water molecules and thus improve the frost resistance of RMP-PP-ECC. At the same time, PP demonstrates hydrophilicity and good bonding with cementitious materials, which can reduce the shrinkage cracks produced by mortar in the process of early maintenance, reduce the cracks produced by the shrinkage of mortar in the process of freezing and thawing repeatedly, and inhibit the development of cracks to increase the toughness of the specimen in the process of freezing and thawing repeatedly; on the other hand, the mixing of PP reduces the internal pore space in the RMP-PP-ECC, reduces the freezing point of the pore space, and thus improves the frost resistance of RMP-PP-ECC[40,[53][54][55]. (a) 0 (b) 25 (c) 50 (d) 75 (e) 100 (f) 125 (g) 150…”

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confidence: 99%

Mechanical, Chloride Permeation, and Freeze–Thaw Resistance of Recycled Micronized Powder Polypropylene-Fiber-Engineered Cementitious Composites

Zheng,

Zhou

2023

Buildings

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Research on engineered cementitious composites was carried out using recycled micronized powder from waste construction waste as a substitute for cement. Consequently, this paper focuses on the investigation of recycled micronized powder (RMP) as the subject of study. Using RMP-PP-ECCA0 as the control group, we explored the impact of polypropylene fiber content (0.5%, 1%, 1.5%, 2%) and the substitution rate of RMP (10%, 20%, 30%, 40%) on the mechanical properties, resistance to chloride ion penetration, and freeze–thaw durability of recycled micronized powder polypropylene-fiber-engineered cementitious composites (RMP-PP-ECCs). It was found that, with the increase in RMP substitution rate and fiber content, the mechanical, chloride ion permeation, and freeze–thaw resistance of recycled micronized powder polypropylene-fiber-engineered cementitious composites showed a trend of increasing and then decreasing when the RMP substitution rate was 10%, and the fiber content was 1.5%; the compressive, tensile, chloride ion permeation, and freeze–thaw resistance of recycled micronized powder polypropylene-fiber-engineered cementitious composites were most obviously improved. Compressive strength performance increased by 18.8%, tensile strength performance increased by 80.8%, maximum tensile strain increased by 314%, and electrical flux decreased by 56.3%. Meanwhile, when the recycled micronized powder substitution rate was 10%, the fiber content was 1%, with the most obvious improvement in flexural and freeze–thaw cycle resistance, compared with the control group 28 d flexural strength increased by 22%, after 150 freeze–thaw cycles, the mass-loss rate was reduced by 26%, and the relative dynamic elastic modulus was improved by 4%. In addition, the chemical composition of the regenerated microfractions and the defects in the matrix of the fracture surface of the tensile specimens, the distribution of polypropylene fibers, the surface morphology, and the failure mode were analyzed by X-ray diffraction and scanning electron microscopy.

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New analytical models to predict the mechanical performance of steel fiber‐reinforced alkali‐activated concrete

Rossi,

Patel,

Dehn

2024

Structural Concrete

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The use of alkali‐activated concrete (AAC) as an alternative construction material to Portland cement‐based concrete (PCC) has been widely encouraged by its enhanced mechanical and durability performance and environmental benefits. However, AAC exhibits low flexural and tensile strength, limiting its application in areas where high post‐cracking flexural and tensile load‐bearing capacity are needed. Steel fibers can be added to improve the composite ductility and toughness. Steel fiber‐reinforced alkali‐activated concrete (SFRAAC) is a new emerging technology with research studies evaluating the effect of fiber addition on its mechanical properties still in the early stages. To promote the application of SFRAAC, analytical models predicting their mechanical performance are needed. This study evaluates the applicability to SFRAAC of previously published analytical models developed for steel fiber‐reinforced cement‐based concrete (SFRPCC). Experimental data available in the literature have been collected to create an extensive database to validate and then calibrate these currently available correlations between mechanical properties for SFRAAC. The prediction models considered in this study correlate the mechanical performance of SFRAAC, that is, compressive strength, modulus of elasticity, splitting tensile strength, flexural and residual flexural strength, to the compressive strength of the reference concrete without fibers, the fiber volume fraction and the fiber reinforcing index. Thus, by knowing the performance of the AAC matrix and the fiber properties and dosage, it is possible to predict the overall mechanical behavior of the steel fiber‐reinforced composite.

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Mechanical and durability properties of steel, polypropylene and polyamide fiber reinforced slag-based alkali-activated concrete

Cited by 10 publications

References 41 publications

Cement Mortars Based on Polyamide Waste Modified with Fly Ash from Biomass Combustion—A New Material for Sustainable Construction

Cement Mortars Based on Polyamide Waste Modified with Fly Ash from Biomass Combustion—A New Material for Sustainable Construction

Mechanical, Chloride Permeation, and Freeze–Thaw Resistance of Recycled Micronized Powder Polypropylene-Fiber-Engineered Cementitious Composites

New analytical models to predict the mechanical performance of steel fiber‐reinforced alkali‐activated concrete

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