Mix Design and Recycled Aggregates Effects on the Concrete’s Properties

Omary, Safiullah; Ghorbel, Elhem; Wardeh, George; Nguyen, Minh Duc

doi:10.1007/s40999-017-0247-y

Cited by 51 publications

(41 citation statements)

References 49 publications

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“…In agreement with Omary et al [11] and considering the importance of the civil construction production process, it is clear that it is not possible to attain sustainable development without making this industry sustainable. Therefore, ceramic waste (CW), or ceramic grog, that is disposed during production in factories and use in buildings has been coming up as a topic that is promising for environmental impacts, mechanical performance and contributing directly to a better construction site management.…”

Section: Introducti̇onsupporting

confidence: 83%

“…Gouveia [17] stresses that some of the main properties presented by grouts are high initial strength, high fluidity, low permeability and high substrate adherence in hardened state. As explains Omary et al [11], the mechanical properties in the hardened state of grout containing recycled aggregates depend on factors such as the type, quality and rate of recycled aggregate, mortar content and water to cement ratio (w/c). As mentioned by Wada [18], the addition of ceramic waste to cementitious matrices is limited to specific cases, because ceramic materials present high porosity, high absorption index.…”

Section: Introducti̇onmentioning

confidence: 99%

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Evaluation of mechanical properties of grouts substituting the natural coarse aggregate for ceramic civil construction waste

et al. 2020

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The lack of control regarding waste generation is a problem still faced by the construction industry, whereas its inputs could be used in the production of new cementitious composites, maintaining the quality, performance and sustainability of structures. This study developed grouts through the substitution of natural aggregate for residues of crushed ceramic bricks, evaluating its fresh state and mechanical properties. The samples displayed loss of workability and initial slump in fresh state, besides loss of compressive strength, elastic modulus, total water absorption and capillary water absorption in hardened state. In addition, composites with grog presented less consistency in fresh state when compared to the reference sample. The differences were even greater over time. As for the hardened state, the compressive strength of the samples was similaramong them at both ages, and all results remained above 14 MPa at 28 days, as required by ASTM C476, hence being characterized as structural grouts for masonry. For the elastic modulus test, the results were higher for samples with lower amounts of waste due to less internal voids and higher volume of natural aggregates. The substitution of natural aggregate for civil construction waste (CCW) in the mixtures increased void ratio and water absorption, while causing the lowest specific gravities of the research. Overall, the sample that presented the most satisfactory values was CCW 25%, showing that it is possible to obtain benefits from waste produced in factories and buildings, even for higher replacement levels, occasionally

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Section: Introducti̇onsupporting

confidence: 83%

Section: Introducti̇onmentioning

confidence: 99%

Evaluation of mechanical properties of grouts substituting the natural coarse aggregate for ceramic civil construction waste

et al. 2020

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“…• φ 150 mm cylinders: Kliszczewicz (2002, 2007), Atahan et al (2011), Bilodeau and Malhotra (1992), Bravo et al (2015a), Carette et al (1993), Casuccio et al (2008), Demir (2009), Dilbas et al (2014), Dossey et al (1994), Etxeberria et al (2007a-b), Evangelista (2014), Evangelista and de Brito (2017), Gomez-Soberon (2002), Martínez-Abella (2004, 2005), González-Fonteboa et al (2011), Gutierrez and Canovas (1995), Hamad and Dawi (2017), Kheder and Al-Windaw (2005), Kliszczewicz and Ajdukiewicz (2002), Koulouris et al (2004), Naik et al (1998), Omary et al (2018), Paul (2011), Pedro et al (2014), Piasta et al (2017), Pul (2008), Remesar et al (2017), Sadati and Khayat (2016), Sivasundaram et al (1989Sivasundaram et al ( , 1991, Tufail et al (2017), Di Maio (2006, 2009); • φ 100 mm cylinders: Aitcin and Mehta (1990) 2014, Iravani (1996), Jin and Li (2003), Khaliq and Taimur (2018), Kim et al (2002), Kou et al (2007) Vogel and Svecova (2012), Yanagi et al (1998), Yang et al (2008),…”

Section: Database Criteriamentioning

confidence: 99%

Scatter of Constitutive Models of the Mechanical Properties of Concrete: Comparison of Major International Codes

Pacheco

Brito

Chastre

et al. 2019

ACT

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An investigation on the scatter of code-type constitutive models that relate compressive strength (c f) with tensile strength (ct f) and Young's modulus (c E) of standard concrete specimens is presented. The influence of the mix design on the accuracy of the c f vs. ct f and c f vs. c E relationships is discussed, with emphasis on the lithological type and morphology of the coarse aggregates. The uncertainty of the constitutive models is analysed in probabilistic terms and random variables that model the uncertainty of the c f vs. ct f and c f vs. c E relationships are proposed for reliability analyses of serviceability limit states. The suitability of the models proposed is assessed through preliminary conservative estimates of their design values. 2. Reesearch goals and significance This paper intends to investigate whether different mix designs and strength ranges will result in different accuracy and precision of the θ of the c c t f vs f and c f vs. c E relationships. The main objective of the paper is the proposal of probability distributions of E θ and fct θ intended for serviceability limit-state (SLS) reliability analyses. Coefficients E θ and fct θ are calculated as shown in

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“…El factor de formación relaciona a la resistividad del hormigón con la resistividad del líquido de poro según la ley de Archie (Whittington et al, 1981). El factor de formación de los hormigones aumenta con el contenido de árido reciclado, pero el factor de formación de la fase pasta se incrementa ligeramente (Omary et al, 2018). Esto significa que, si bien el mortero adherido incrementa la conectividad de poros, el efecto dinámico de absorción del árido puede mejorar la zona de interfase notablemente.…”

Section: Resistividadunclassified

Incidencia Del Árido Reciclado Sobre La Durabilidad Del Hormigón Armado Frente a La Corrosión

Zaccardi¹,

Lemit²,

Pico-Cortés³

et al. 2019

Memorias Conpat 2019

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El árido reciclado procedente de hormigón de desecho triturado es apto para elaborar hormigón estructural. Permite consumir menos recursos no renovables y generalmente también menos energía. Pero es más poroso que la mayoría de las rocas naturales. La porosidad del hormigón de recubrimiento define la resistencia frente a la corrosión de las armaduras, y entonces se puede dudar acerca de cómo el empleo del árido reciclado afecta a la durabilidad del hormigón armado. En este artículo se describe el desempeño frente a la corrosión de hormigones con áridos reciclados, en las etapas de iniciación (carbonatación e ingreso de cloruro) y propagación (resistividad eléctrica y fisuración). Se enuncian aspectos particulares a considerar, mientras se verifica la factibilidad de incluir árido reciclado en hormigón sin disminuir sus prestaciones durables. Palabras clave: hormigón con árido reciclado; corrosión; carbonatación; ingreso de cloruro; durabilidad.

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Mix Design and Recycled Aggregates Effects on the Concrete’s Properties

Cited by 51 publications

References 49 publications

Evaluation of mechanical properties of grouts substituting the natural coarse aggregate for ceramic civil construction waste

Evaluation of mechanical properties of grouts substituting the natural coarse aggregate for ceramic civil construction waste

Scatter of Constitutive Models of the Mechanical Properties of Concrete: Comparison of Major International Codes

Incidencia Del Árido Reciclado Sobre La Durabilidad Del Hormigón Armado Frente a La Corrosión

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