Effect of the Type of Cement on the Performance of Repair Mortars

Author(s): Inès L. Tchetgnia Ngassam and Hans Beushausen
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 489-496
Total Pages: 8
Language : English

Abstract: The modifications brought by fillers and extenders in concrete are well known for the fresh properties of concrete, as well as for strength development and durability. But these effects are not always fully understood, especially for some specific applications, such as the renovation of structures. The main causes of premature repair mortar failure are cracking and debonding. Poor performance can be also related to the mortar mix design. Therefore, there is a need to investigate the effect of extenders and fillers on the performances of mortars. To do this, the performance of three mortars made of different types of commercial cements were studied. One of the three cements contained only limestone, the second one mostly GGBS, and third one, GGBS and fly ash (FA). Their effects were studied on mortars modified with admixtures of calcium oxide CaO and ethylene vinyl acetate polymer EVA. These studies reveal that even though GGBS alone increases the compressive strength of the modified mortars, it tends to reduce the mortar performance by inhibiting the effect of the polymer EVA and the quicklime. However, the mortar with GGBS and FA and the one with limestone only have a good resistance to cracking.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00