Robustness of concrete with low Portland cement content: proportioning deviations and variability in particle size and morphology of the aggregates

• Grant number: 12/21134-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2013
• End date: August 31, 2016
• Field of knowledge: Engineering - Civil Engineering - Construction Industry
• Principal Investigator: Rafael Giuliano Pileggi
• Grantee: Markus Samuel Rebmann
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Concretes with low Portland cement content are justified by technical reasons (lower hydration heat, shrinkage and cracking) and sustainability (lower consumption of energy and raw materials, CO2 emissions and transport requests). The formulation of these concretes is based on particle packing and dispersion concepts, use of mineral additions and fillers and appropriate material choice. Thus it is possible to deliver 1 MPa of compressive strength with less than 5 kg/m3 of binders. Variability in raw materials, in environmental conditions and in the production process results in variability of various fresh and hardened properties. The feasibility of applying concrete at large scale depends on its sensitivity in this variable scenario. Concrete with adequate robustness, i.e. sufficiently tolerant to variations, are desirable. This research aims to evaluate the robustness of concrete with low cement content, focusing primarily on deviations in proportioning and on grading and morphological variability of aggregates. Incremental fractional factorial designs will be applied to analyze the influence of different factors that affect the properties of concrete. Based on these results it is intended to obtain information on how to increase robustness, making concrete with low cement content safe for use on site.

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)

A. R. E. CÁCERES; I. GALOBARDES; M. S. REBMANN; R. MONTE; A. D. DE FIGUEIREDO. Caracterização geométrica de macrofibras poliméricas. Rev. IBRACON Estrut. Mater., v. 8, n. 5, p. 644-668, 2015-10-00. (14/24410-6, 12/21134-2)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

REBMANN, Markus Samuel. Robustness of concrete with low Portland cement consumption: deviations in proportioning and particle size and morphological variability of the aggregates.. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Escola Politécnica (EP/BC) São Paulo.