Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 169, Issue -, Pages 911-922Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.03.005
Keywords
Calcium sulfoaluminate cement; Polymer latex; Setting time; Mechanical properties; Durability
Categories
Funding
- National Natural Science Foundation of China [51572196]
- Sino-German Center for Research Promotion [GZ 1290]
- Open Testing Fund of Large Scale Instruments and Equipment of Tongji University [0002016001]
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In this study, three different types of polymer latexes (styrene butadiene rubber (SBR), styrene acrylic ester (SAE) and polyacrylic ester (PAE)) with three different dosages (0%, 10% and 20%) were employed to prepare polymer latex modified calcium sulfoaluminate (CSA) cement mortar based on the same workability. The setting time, mechanical properties including strength, shrinkage, weight loss, water capillary adsorption, anti-penetration property and durability properties such as resistance to freeze-thaw cycle, carbonization and sulfate attack were measured. The experimental results show that polymer latexes perform good water-reduction effect and delayed setting behavior on CSA cement mortar. Meanwhile, polymer latexes are helpful to enhance the mechanical properties of CSA cement mortar. Generally, SBR latex modified mortar performs the best properties in terms of strength, weight loss, water capillary adsorption and anti-penetration property. Addition of polymer latex decreases strength when subjected to extreme conditions, however, polymer latex modified mortars perform good resistance to carbonization and sulfate attack, although only SBR latex improves the freeze-thaw cycle resistance. (C) 2018 Elsevier Ltd. All rights reserved.
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