SYMPOSIA PAPER Published: 27 August 2014
STP157720130136

Use of Nanoparticles in Cold Weather Masonry Construction

Source

Masonry systems are vulnerable to cold climates during construction and service. In North America, this issue is a major concern for masonry contractors as they either have to implement thorough heating practices for laying and curing masonry systems or postpone the construction to warmer seasons. This might lead to loss of productivity, delays in construction schedules, and, inevitably, extra costs. To minimize the adverse effects of cold weather on masonry construction, a new approach based on the use of nanoparticles in the mixture design of mortar joints is proposed. Previous research on the use of nanoparticles in cement-based materials has shown that nanoparticles can significantly accelerate the kinetics of hydration of cementitious binders under normal temperatures (22°C ± 2°C). In this study, an effort is made to assess the effect of nano-alumina (NA) and nano-silica (NS) with dosages of 0 %, 2 %, and 4 % by mass of masonry cement on the performance of mortar mixtures prepared and cured at 5°C. The key assessment criteria were based on fresh properties, compressive strength, and microstructural features. The results indicated that mortar mixtures containing NS had better performance than that of the other mixtures with or without NA, which suggests the promising use of NS in cold weather masonry construction.

Author Information

Kazempour, H.
Dept. of Civil Engineering, Univ. of Manitoba, Winnipeg, MB, CA
Bassuoni, M., T.
Dept. of Civil Engineering, Univ. of Manitoba, Winnipeg, MB, CA
Hashemian, F.
Dept. of Civil Engineering, Univ. of Manitoba, Winnipeg, MB, CA
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Details
Developed by Committee: C07
Pages: 1–18
DOI: 10.1520/STP157720130136
ISBN-EB: 978-0-8031-7600-3
ISBN-13: 978-0-8031-7599-0