Properties of Nanoclay Modified High-Performance Concrete Undergoing Freeze-Thaw Cycles in Salt Lake Brine
In view of the obvious invalidity of high-performance concrete in the salt lake regions, nanoclay was added in high-performance concrete as an active admixture to withstand the terrible environment of salt lake regions. The properties (compressive strength and mass loss rate) of concrete modified with nanoclay undergoing freeze-thaw cycles in simulative salt lake brine were investigated, and the microstructures of the concrete were analyzed by XRD and SEM-EDS in detail. The results showed that nanoclay gave great rise to the performance of concrete after freeze-thaw cycles in simulative salt lake brine, owning to the denser microstructure of concrete with nanoclay, the invasion difficulties of Mg2+ from the salt lake brine into concrete with nanoclay, and the restriction of the dissolution of Ca(OH)2 and formation of CaSO4 · 2H2O.
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Document Type: Research Article
Publication date: September 1, 2019
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