Assessment of the Behavior of Polymer Cement Mortars for Repair at High Temperatures

Author(s): E. Menéndez, E. Puerto, R. Gettu, Ma Eugenia Maciá and A. Castillo
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: 469-478
Total Pages: 10
Language : English

Abstract: Repair products with a cement base and organic components are used extensively in concrete structures, due to their thixotropy and good adherence to rough surfaces. However, during their service life these materials can be exposed to fire. In the present work, different commercially-available repair mortars have been assessed for their response to fire. For this, their chemical, physical and mechanical properties have been characterized before and after fire. The fire test has been done following the ISO 834 Standard (i.e, heating during 360 minutes until 1214oC). Two types of samples have been analyzed: samples only with repair mortars and bilayer specimens formed by standard mortar and the repair product. In the first case, two of six mortars maintain their integrity after the fire with a decrease in compressive strength and an increase in open porosity. However, the bilayer specimens experienced debonding between the layers. This difference in behavior has been analyzed at the microstructural level, and it was found that there is some degradation of the hydration products close to the interface in the repair mortars due to the reserve of humidity provided by the standard cement mortar.

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

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