Effect of nanoparticles on the properties of masonry mortars and assemblages at a cold temperature

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Date
2014, 2014
Authors
Kazempour, Hooman
Journal Title
Journal ISSN
Volume Title
Publisher
ASTM International
Canadian Society for Civil Engineers
Abstract
Cold weather masonry construction is a major concern for contractors as they either have to implement heating practices for laying and curing masonry systems or postpone the construction to warmer periods. This can lead to loss of productivity rate and delays in construction schedules with associated extra costs. This thesis explores a novel approach for mitigating the adverse effects of cold weather on masonry construction in early fall periods through the application of nano-alumina (NA) and nano-silica (NS) in mortar joints. The assessment criteria were based on the fresh properties, hardened properties and microstructural features of mortar mixtures and mechanical behaviour of concrete masonry prisms at early and later ages. Various test results show that NS can be successfully used to minimize the adverse effects of cold temperature on mortar joints by speeding up the hydration of cement, shortening the setting time, and increasing the strength up to 72 h.
Description
Keywords
masonry, cold weather, nanoparticle
Citation
H. Kazempour, M.T. Bassuoni and F. Hashemian, “Use of Nanoparticles in Cold Weather Masonry Construction”, ASTM Selected Technical Papers (STPs) 1577, 2014, pp. 1-18.
H. Kazempour, M.T. Bassuoni and F. Hashemian, “Nano-modified Mortar: A New Approach for Cold Weather Masonry Construction”, CSCE 2014 General Conference, Halifax, 2014, pp. 1-10.