The effects of porosity on mechanical behavior and water absorption of an environmentally friendly cement mortar with recycled rubber

Angelin, Andressa Fernanda; Lintz, Rosa Cristina Cecche; Barbosa, Luísa Andréia Gachet; Osório, Wislei R.

doi:10.1016/j.conbuildmat.2017.06.061

Cited by 60 publications

(22 citation statements)

References 51 publications

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“…Crumb rubber (CR) extracted mainly via the shredding process of waste tyres is used to partially or fully replace fine aggregates in conventional concrete, which can help improve the resistance of concrete to abrasion, impact, alkali-silica reaction and freeze-thaw cycles as well as other durability performance (Aiello and Leuzzi, 2010;Angelin et al, 2017;Liu et al, 2012;Medina et al, 2017;Si et al, 2018;. However, the main binder component of these crumb rubber concrete (CRC) is still ordinary Portland cement (OPC), which largely hinders the sustainable development of construction industry.…”

Section: Introductionmentioning

confidence: 99%

Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres

Zhong

Poon

Chen

et al. 2019

Journal of Cleaner Production

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To mitigate the potential problems of waste tyres and Portland cement greenhouse gas emissions while further promote the sustainable development of construction industry, this paper, for the first time, explores the workability and mechanical properties of crumb rubber alkali-activated fly ash-slag mortar reinforced with recycled tyre steel fibre (RSFRAM) considering different contents of crumb rubber (CR, i.e. 5%, 10% and 15% replacement by volume of fine aggregate) and recycled tyre steel fibre (RTSF, i.e. 0.5% and 1.0% by volume). The results indicate that the inclusion of CR led to a 4.7% to 26.7% improvement in workability of RSFRAM when the RTSF content was low, while the addition of RTSF compensated the strength loss caused by the addition of CR. The combination of CR and RTSF created a synergistic effect on the flexural behaviour of RSFRAM. The optimal mixture was regarded as R5F1.0 (5% CR replacement and 1.0 vol.% RTSF) exhibiting comparable compressive strength, and superior flexural strength (around 171.1% higher), toughness indices (highest among all RSFRAMs) and residual strength factors (higher than 100) compared to the reference mixture without CR and RTSF. In addition, R5F1.0 can meet the strength requirement of concrete (i.e. 28 MPa for basic construction application) and thus suitable for structural applications as a sustainable material.

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Section: Introductionmentioning

confidence: 99%

Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres

Zhong

Poon

Chen

et al. 2019

Journal of Cleaner Production

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“…The effect of porosity on cement mortar was also studied by Anglin et al [19]. Another principal subject related to cement mortar is the fracture type which has been widely investigated so far.…”

Section: Introductionmentioning

confidence: 99%

“…Many scholars have conducted several research works on the effects of different parameters including water to cement (W/C) ratio, sand to cement (S/C) ratio and aggregate type S/Con the compressive strength and related factors such as porosity, workability and durability of mortar [14][15][16][17][18][19][20]. As instance, Singah et al studied the effect of W/C ratio on mechanical properties of cement mortar such as compressive and tensile strengths [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Main Factors on Fracture Mode of Mortar, A Graphical Study

2017

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One of the most effective ways to identify the concrete properties is to understand further about the cement mortar, which is a mixture of cement paste and fine aggregate. In order to identify the behavior of cement mortar, all required materials including cement, fine aggregate, water as well as the different ratios of each material should beinvestigated. The main objective of this research is to study the effectiveness of main parameters of mortar on the fracture mode and related factors. Specifically 26 mixing designs of flexural mortar with three cement strength classes (32.5, 42.5 and 52.5 MPa), three water to cement (W/C) ratios (0.25, 0.3 and 0.35) and three sand to cement (S/C) ratios (2.5, 2.75 and 3) were first prepared. The prepared samples were then tested using a stress-strain apparatus. Some pictures were finally taken from the fracture surfaces to investigate the mode and angle of fractures. The results indicated that any change in the main parameters of mortar changes the fracture mode and the fracture angle.

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“…The effect of incorporating rubber powder in mortar for coating was confirmed by [5] and [6]; according to their performed research studies, mortar containing this waste rubber displays lower incidences of visible fissures and increases water absorption through capillarity. According to [7], using 30% proportions of recycled tire rubber to substitute sand in high-strength mortars contributed to decreasing traction strength in flexion and compression; the presence of irregular and spheroid pores in the morphology was verified. On the other hand, the increasing usage of thermoelectric power plants and the consumption of coal as fuel have generated considerable amounts of waste products as light or fly ash and heavy or bottom ash.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis of mechanical properties of mortars with fly ash and waste tire rubber

Pczieczek

Effting

Gomes

et al. 2019

Rev. IBRACON Estrut. Mater.

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This article aims to perform statistical analysis on the inclusion effects of waste tire rubber and fly ash from thermoelectric plants as mortar components for coating buildings. Reference mortars and mortars containing 5% and 10% rubber with a maximum grain size of 0.71 mm and mortars containing fly ash particles with a diameter of 45 μm were produced. Mortars containing rubber replaced 5% and 10% of the fine aggregate mass by this material and fly ash was added in 10% and 20% proportions compared to the cement volume. A 3² factorial experiment was performed on the mechanical properties of the compressive strength of mortars, applying analysis of variance (ANOVA) and surface response. The rubber waste material contributed to the decrease in compressive strength of the mortar and that factor displayed the highest significance in the response variable.

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The effects of porosity on mechanical behavior and water absorption of an environmentally friendly cement mortar with recycled rubber

Cited by 60 publications

References 51 publications

Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres

Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres

Effect of Main Factors on Fracture Mode of Mortar, A Graphical Study

Statistical analysis of mechanical properties of mortars with fly ash and waste tire rubber

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