EFFECT OF SUPERPLASTICIZER ON MORTARS WITH RECYCLED AGGREGATES

Author(s): Gabriela A. Valencia, Winnie F. Santos, Sérgio C. Ângulo, Rafael G. Pileggi
Book Title: III Progress of Recycling in the Built Environment
Editor: I. Martins, C. Ulsen and S. C. Angulo
e-ISBN: 978-2-35158-158-2
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 205-212
Total Pages: 8
Language: English

Abstract: Many researchers have proposed alternatives to improve mortars with recycled aggregate as it demands more water due to high porosity. The proposal seeks to study the effect of superplasticizer on fresh mortars replacing natural aggregate by CDW recycled aggregates trying to reach same consistency. Size and shape distributions of aggregates were similar. For the same mortars designs, only replacing the aggregates, mixing and stepped flow tests were carried out to investigate rheological behaviour. Increasing 5 times superplasticizer’s optimum content, natural aggregate mortars showed 20% higher mixing energy and similar rheological behaviour at stepped flow test. Otherwise, recycled aggregate mortars showed 7% reduction of mixing energy and, at stepped flow tests, reduction of the torque at low rotation speed.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00