Influence of silanes on the setting time and early age hardening of bulk hydrophobic mortars

Author(s): Nenad Milenković, Jean-Paul Lecomte, Brice Delsaute, Marie-Paule Delplancke, Stéphanie Staquet
Paper category: Proceedings
Book title: Proceedings of the 2nd International RILEM/COST Conference on Early Age Cracking and Serviceability in Cement-based Materials and Structures Volume 1
Editor(s): Stéphanie Staquet and Dimitrios Aggelis
ISBN:978-2-35158-199-5
e-ISBN:978-2-35158-198-8
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 435-440
Total Pages: 6
Language : English

Abstract: Two Si-based admixtures (an emulsion of n-octyl triethoxy silane and encapsulated silicone resin) were used as integral water repellents in mortar. The setting and early age hardening properties of CEM I mortar (water-to-cement ratio of 0.5) was assessed by means of penetration resistance tests, ultrasonic pulse velocity tests and compressive strength tests coupled to electrical conductivity tests campaign. Microcapsules have less influence on the mortar setting and early age hardening, while giving very good waterproofing to the mortar. The emulsion induces a significant delay in setting and a large decrease in mechanical properties. Several measurements are used to define the initial and final setting time and compared.

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