PSI - Issue 28

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com Procedia Structural Integrity 28 (2020) 430–439 StructuralIntegrity Procedia 00 (2019) 000–000

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© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract In this paper an experimental study was carried out with the aim of determining the formulation of an ordinary concrete intended for the construction of slabs and engineering structures. The targeted concrete has a mechanical compressive strength of 25 MPa with a slump of 8 cm which gives a plastic concrete of class S2. The experimental procedure starts with a physical characterization of the aggregates, we calculate the density, porosity and compactness. A granulometric analysis was carried out to determine the proportion of aggregates according to their size. After applying the Dreux-Gorisse method, the concrete formulation found is characterized by a water/cement ratio of 0.7, a percentage of 30% sand, 45% gravel 3/8, and 25% gravel 8/16. Keywords: Ordinary concrete, compressive strength, grain size analysis, Dreux-Gorisse method, Water/Cement ratio. 1. Introduction Obtaining and optimizing concrete formulations is based on several major criteria: workability, strength, durability and cost. These criteria must be established from the outset before seeking the dosage of each component, and must be the subject of a compromise between the customer and the manufacturer Bernier (2004). In this paper, we will determine exactly the optimal dosage of the different concrete constituents to ensure both: workability, compressive strength and service life desirable for ordinary concrete. Concrete formulation requires first of all knowledge of the characteristics of the aggregates (sand and gravel) used. For this reason, aggregate characterization tests are essential to define the water absorption coefficient and the compactness of the gravel. Subsequently, agranulometric analysis was carried out to determine the size distribution of the grains constituting the aggregate. In the field of civil engineering, several methods are used to define the composition of concrete such as: Abstract In this paper an experimental study was carried out with the aim of determining the formulation of an ordinary concrete intended for the construction of slabs and engineering structures. The targeted concrete has a mechanical compressive strength of 25 MPa with a slump of 8 cm which gives a plastic concrete of class S2. The experimental procedure starts with a physical characterization of the aggregates, we calculate the density, porosity and compactness. A granulometric analysis was carried out to determine the proportion of aggregates according to thei size. After applying the D eux-Gorisse method, the co c ete formulation fou is characterized by a water/ceme t ratio of 0.7, a percentage of 30% sand, 45% gravel 3/8, and 25% gravel 8/16. Keywords: Ordinary concrete, compressive strength, grain size analysis, Dreux-Gorisse method, Water/Cement ratio. 1. Introduction Obtaining and optimizing concrete formulations is based on several major criteria: workability, strength, durability and cost. These criteria must be established from the outset before seeking the dosage of each component, and must be the subject of a compromise between the customer and the manufacturer Bernier (2004). In this paper, we will determine exactly the optimal dosage of the different concrete constituents to ensure both: workability, compressive strength and service life desirable for ordinary concrete. Concrete formulation requires first of all knowledge of the characteristics of the aggregates (sand and gravel) used. For this reason, aggregate characterization tests are essential to define the water absorption coefficient and the compactness of the gravel. Subsequently, agranulometric analysis was carried out to determine the size distribution of the grains constituting the aggregate. In the fi ld of civil engi eering, s veral methods are used to defin the composition of c c te such a : 1st Virtual European Conference on Fracture Formulation of Ordinary Concrete using the Dreux-Gorisse Method Chbani Hamza a , Saadouki Bouchra a, *, Boudlal Mostapha b , and Barakat Mohamed b a Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, Hassan II University, BP 8118 Oasis - Casablanca, Morocco b Laboratory of Mechanics Higher Institute of Maritimes ‘Studies (ISEM), Km 7 Road El Jadida - Casablanca, Morocco 1st Virtual European Conference on Fracture Formulation of Ordinary Concrete using the Dreux-Gorisse Method Chbani Hamza a , Saadouki Bouchra a, *, Boudlal Mostapha b , and Barakat Mohamed b a Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, Hassan II University, BP 8118 Oasis - Casablanca, Morocco b Laboratory of Mechanics Higher Institute of Maritimes ‘Studies (ISEM), Km 7 Road El Jadida - Casablanca, Morocco

* Corresponding author. Tel.: +212-6363-4015 E-mail address: chbanihamza1@gmail.com

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.050 2452-3216© 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 2452-3216© 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo * Corresponding author. Tel.: +212-6363-4015 E-mail address: chbanihamza1@gmail.com