Influence of natural fiber dosage and length on adobe mixes damage-mechanical behavior

Araya-Letelier, Gerardo; Concha-Riedel, J.; Antico, F.C.; Valdés, Camila; Cáceres, Gustavo

doi:10.1016/j.conbuildmat.2018.04.151

Cited by 83 publications

(57 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To provide accurate DIC results, there should be a calibration in terms of the initial measurements of the dimensions of the specimen before loading that need to be captured by the camera to calibrate the subsequent total deformations as well as the normalized deformations (strains). This setup was very similar to the flexural experimental setup used previously by Araya-Letelier et al [32][33][34] to assess the flexural behavior of adobe mixes reinforced with natural and synthetic fibers. The individual flexural strength ( f f ) values of each prism specimen were estimated using Equation (2).…”

Section: Flexural Strength and Flexural Toughness Indicesmentioning

confidence: 98%

“…For each mortar mix, values of AV, SD, and COV of were calculated. For cement-based materials, flexural toughness provides an indication of fracture energy absorption capacity [35] and the incorporation of fibers is expected to impact flexural toughness [32,33,36]. Consequently, this study evaluated the flexural toughness indices of each mortar mix according to the standard ASTM C1018 [37].…”

Section: Flexural Strength and Flexural Toughness Indicesmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers

et al. 2019

View full text Add to dashboard Cite

Commercial polypropylene fibers are incorporated as reinforcement of cement-based materials to improve their mechanical and damage performances related to properties such as tensile and flexural strength, toughness, spalling and impact resistance, delay formation of cracks and reducing crack widths. Yet, the production of these polypropylene fibers generates economic costs and environmental impacts and, therefore, the use of alternative and more sustainable fibers has become more popular in the research materials community. This paper addresses the characterization of recycled polypropylene fibers (RPFs) obtained from discarded domestic plastic sweeps, whose morphological, physical and mechanical properties are provided in order to assess their implementation as fiber-reinforcement in cement-based mortars. An experimental program addressing the incorporation of RPFs on the mechanical-damage performance of mortars, including a sensitivity analysis on the volumes and lengths of fiber, is developed. Using analysis of variance, this paper shows that RPFs statistically enhance flexural toughness and impact strength for high dosages and long fiber lengths. On the contrary, the latter properties are not statistically modified by the incorporation of low dosages and short lengths of RPFs, but still in these cases the incorporation of RPFs in mortars have the positive environmental impact of waste encapsulation. In the case of average compressive and flexural strength of mortars, these properties are not statistically modified when adding RPFs.

show abstract

Section: Flexural Strength and Flexural Toughness Indicesmentioning

confidence: 98%

Section: Flexural Strength and Flexural Toughness Indicesmentioning

confidence: 99%

Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the use of these BPFs as fiber-reinforcement for non-synthetic construction materials has been included in very few studies, which have mainly been focused on the use of BPFs as reinforcement in soil remediation applications [13,29,30]. To the best of the authors' knowledge, although a large fraction of the human population still lives in earthen-based dwellings [31] that exhibit limitations, such as a low impact and abrasion resistance, among others [32][33][34], the recent paper by Araya-Letelier et al [35] is the only study addressing the use of these BPFs as fiber- The goals of this paper are to assess the influence of increasing doses of BPFs on earthen mixes (also considering an unreinforced earthen mix used as a control mix), in order to produce a broad experimental evaluation of the durability, mechanical, and fracture properties of this new composite material for construction applications. Specifically, the following properties of earthen mixes are assessed: (i) Capillarity; (ii) compressive and flexural strength; (iii) impact strength (both at first crack and at collapse); and (iv) dry abrasion resistance.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer-Waste Fiber Reinforcement for Earthen Materials: Capillary, Mechanical, Impact, and Abrasion Performance

et al. 2020

View full text Add to dashboard Cite

The poultry industry, highly prevalent worldwide, generates approximately 7.7 × 106 metric tons of chicken feathers (CFs), which become a major environmental challenge due to their disposal when considered waste or due to their energy transformation consumption when considered by-products. CFs are mainly composed of keratin (approximately 90%), which is one of the most important biopolymers whose inherent characteristics make CFs suitable as biopolymer fibers (BPFs). This paper first assesses the morphological and chemical characteristics of these BPFs, through scanning electron microscopy and energy dispersive X-ray spectroscopy, and then evaluates the waste valorization of these BPFs as a sustainable alternative for fiber-reinforcement of earthen mixes intended for earthen construction, such as adobe masonry, rammed earth, and earthen plasters. In particular, four earthen mixes with increasing doses of BPFs (i.e., 0%, 0.25%, 0.5%, and 1% of BPFs by weight of soil) were developed to evaluate the impact of BPF-reinforcement on the capillary, mechanical, impact, and abrasion performance of these earthen mixes. The addition of BPFs did not significantly affect the mechanical performance of earthen mixes, and their incorporation had a statistically significant positive effect on the impact performance and abrasion resistance of earthen mixes as the BPF dose increased. On the other hand, the addition of BPFs increased the capillary water absorption rate, possibly due to a detected increment in porosity, which might reduce the durability of water-exposed BPF-reinforced earthen mixes, but a statistically significant increment only occurred when the highest BPF dose was used (1%).

show abstract

“…Sustainable building materials: those that are profitable, that are socially accepted and which have a low environmental impact, are the focus of many researches which now exist, which back-up and contribute to the use of earth inside buildings [3]. Materials such as earth bags, whose ratio of polypropilene -to earth in the building's total mass is small, produces considerably lower CO2 emissions, according to [4].…”

Section: Introductionmentioning

confidence: 99%

Construction of a Superadobe Dome

Gomez¹,

Pérez²,

García³

et al. 2019

Preprint

View full text Add to dashboard Cite

Superadobe Technology consists on filling long polypropylene sacks with a moist mixture of clay, sand, gravel and lime/cement; placing and compacting one on top of another forming concentric rings of decreasing radius and describing a double curvature monolith.From the 26th of August till the 6th of September of 2017, a group of 10 students at the “Domoterra” Institute of Earthbag construction, in the province of Teruel, autonomous community of Aragon, Spain, participated in the construction of what would become a Superadobe domed shelter of internal diameter 4m, roughly 3.5m high with the capacity to enclose 17.5m^2 of habitable surface, using approximately 250m of polypropylene sack and 20 m³ of earth.The structure advanced from an initial base cylinder of 0.5 m to the height of 2.1 m in 7 effective work days of 8 hours each day, and such an experience is taken into account together with existing literature, to describe the construction process of a Superadobe dome.

show abstract

Influence of natural fiber dosage and length on adobe mixes damage-mechanical behavior

Cited by 83 publications

References 38 publications

Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers

Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers

Biopolymer-Waste Fiber Reinforcement for Earthen Materials: Capillary, Mechanical, Impact, and Abrasion Performance

Construction of a Superadobe Dome

Contact Info

Product

Resources

About