Strenght of aggregates: control and effect on mechanical behaviour of concretes

• Grant number: 16/20420-2
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2018
• End date: September 30, 2020
• Field of knowledge: Engineering - Civil Engineering - Construction Industry
• Principal Investigator: Sérgio Cirelli Angulo
• Grantee: Sérgio Cirelli Angulo
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Aggregates are the most representative material of the concrete. Its characteristics affect mechanical performance of concrete. In the last decades, a reduction of the quality aggregate increasing the content of porous and weak particles is observed near metropolitan area of large cities related to regional scarcity of raw materials. This research aims: a) determining compressive strength and elastic modulus of particles of aggregates and those of cement pastes, particle per particle, and b) investigating the influence of aggregates weak particles content on mechanical performance of concretes. Experimental plan will include the determination of porosity and strength distributions of the granite aggregates, as well as the porosity and strength distributions of cement pastes (with different porosities or water/cement ratios). A concrete experimental campaign will be done to investigate how the concentration of weak particles inside aggregates will affect concrete mechanical performance. Results will be also correlated with theoretical-experimental modelling proposed by de Larrard et al. (AU)

Scientific publications

(4)

(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)

ANGULO, SERGIO C.; SILVA, NATALIA V.; LANGE, DAVID A.; TAVARES, LUIS MARCELO. Probability distributions of mechanical properties of natural aggregates using a simple method. CONSTRUCTION AND BUILDING MATERIALS, v. 233, FEB 10 2020. (16/19974-3, 16/02902-0, 14/50948-3, 16/20420-2)

LOZ, PAULO H. F.; ANGULO, SERGIO C.; REBMANN, MARKUS S.; TUTUMLUER, EROL. Use of a 3D Structured-Light Scanner to Determine Volume, Surface Area, and Shape of Aggregates. JOURNAL OF MATERIALS IN CIVIL ENGINEERING, v. 33, n. 9, SEP 1 2021. (16/20420-2, 14/50948-3, 17/25826-0)

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)

KATAGUIRI, KAREN; BOSCOV, MARIA EUGENIA G.; TEIXEIRA, CLAUDIA E.; ANGULO, SERGIO C.. Characterization flowchart for assessing the potential reuse of excavation soils in Sao Paulo city. JOURNAL OF CLEANER PRODUCTION, v. 240, DEC 10 2019. (14/50948-3, 16/20420-2)