Mechanical properties of cementitious pastes: probabilistic analyses

• Grant number: 18/07423-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2018
• End date: July 31, 2019
• Field of knowledge: Engineering - Civil Engineering - Construction Industry
• Principal Investigator: Sérgio Cirelli Angulo
• Grantee: Marcos Pires Kassab
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Cementitious matrix's heterogeneity is the determinant factor of flaws' distributions, representing a pivotal influence on those materials' mechanical properties. The objective is to determine the variability of mechanical properties of the hardened cement pastes using different water/cement ratios and the experimental mechanical method to test particles (by Point Load test and elastic Hertzian contact) developed by LME-USP. Portland cement pastes will be prepared with three different water/cement ratios (0.3;0.5; 0.7), totally dispersed without water bleeding. For each w/c ratio, 50 cubic (10mm) specimens will be moulded and then, 20 will be selected to undergo mechanical tests, by porosity criteria. The results will undergo statistical adherence tests, relative to some probabilistic distributions (normal, lognormal. Weibull) to evaluate variability of mechanical properties. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

OLIVEIRA, FABIO C.; KASSAB, MARCOS P.; SILVA, V, NATALIA; ANGULO, SERGIO C.; TAVARES, LUIS MARCELO; LANGE, DAVID A.. Probabilistic functions of mechanical properties of plain cement pastes determined by a reduced-size test. CONSTRUCTION AND BUILDING MATERIALS, v. 286, JUN 7 2021. (16/20420-2, 18/07623-7, 18/07423-8, 14/50948-3)