Title:
Concretes with Low Paste and Low Cement Content Durability and Sustainability
Author(s):
Edgardo Becker, Patricio Corallo, Juan Domínguez, Cristian Ríos, Ismael Gea, and Javier Cañari
Publication:
Symposium Paper
Volume:
326
Issue:
Appears on pages(s):
52.1-52.10
Keywords:
accelerated carbonation; compressive strength, durability; dynamic elastic modulus; low cement content; low paste content; rapid chloride permeability test; water absorption
DOI:
10.14359/51711035
Date:
8/10/2018
Abstract:
The first aim of this paper is to design concretes with minimum paste and cement contents, having strengths and workability comparable to conventional concretes. On one hand, an extensive work on packing of many available types of aggregates, with different shapes and particle size distributions, has been done to find out combinations that lead to minimum paste contents. As for the concrete, composition of paste was adjusted in order minimize cement and paste content for a given workability, a specified compressive strength and a certain aggregate combination. The second aim of this paper is to prove that, despite not complying with the minimum cement content indicated in construction codes, durability performance of those special concretes is better or, at least not worse than for conventional concretes with similar workability and compressive strength, showing that durability specifications should limit the maximum paste content, instead of the minimum cement content.
Related References:
1. Daminelli, B., 2013, “Conceitos para Formulação de Concretos com Baixo Consumo de Ligantes: Controle Reológico, Empacotamento e Dispersão de Partículas”, PhD T, Escola Politécnica da Universidade de São Paulo, Brazil.
2. Becker, E., Corallo, P., Ríos, C. 2014. “Desarrollo de un Modelo para Determinar Empaque Óptimo de Partículas de Agregados para Hormigones de Mínimo Contenido de Pasta”, 20th Technical Symposium of Concrete Technology, AATH, Concordia, Argentina.
3. Corallo, P., Collura, A., Acri, A., Ríos, C., 2010, “Estudio De Las Variables Que Influyen En la Tendencia A Fisuración Térmica De Hormigones Masivos Estructurales” 18th Technical Symposium of Concrete Technology, AATH, Mar del Plata, Argentina.
4. Corallo, P., Domínguez, J., Ríos, C., Gea, I., Cañari, J, Becker, E., 2017, “Thermal cracking risk in conventional and low-paste-content structural mass concretes”, 59° Brazilian Concrete Symposium, Bento Gonçalves, RS, Brazil.
5. Gopalakrishnan, K. and Shashidhar, N., 2007, “Structural characteristics of 3D random packing of aggregates with wide size distribution”. World Academy of Science, Engineering and Technology, N°32.
6. Quiroga, P., Fowler, D, 2003, “The Effects of Aggregates Characteristics on the Performance of Portland Cement Concrete”, Report ICAR 104-1F, University of Texas, Austin, TX