Effects of polycarboxylate ether (PCE)-based superplasticizer on the dissolution and subsequent hydration of calcium oxide (CaO)
Source abstract
Abstract
Calcium oxide (CaO) is an important construction material, used as expansive agent, alkaline activator, and repairing material for historical structures. In this study, the dissolution and subsequent hydration of CaO, with or without the polycarboxylate ether (PCE)-based superplasticizer, were investigated to elucidate the complex crystallization process of calcium hydroxide (Ca(OH)2). On contact with pure water, CaO particles began to hydrate within a few minutes, while releasing a significant amount of heat. Adding superplasticizer slowed such rapid heat evolution by forming a dormant period and significantly affected the crystallinity of the hydration product. The dormant period was controllable by the amount of added superplasticizer. Moreover, as a result of early nucleation of Ca(OH)2, the formation of 10–100-nm spherical nanoparticles was observed via an in-situ transmission electron microscope, which completely differed from the final crystal shape of the hydration product.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Calcium Carbonate Crystallization and Inhibition · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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