A scalable framework for air-entraining agent adsorption on fly ash: Intrinsic capacity and Ca-driven non-proportional uptake
Source abstract
Abstract
To facilitate their continued use in concrete as sources become less standard, interactions between fly ash and air-entraining admixtures (AEA) must be better understood. For this study, adsorption tests were conducted using portland cement, fly ash, calcium salts, and a commercial AEA. Varying fly ash-to-solution ratio responses indicated that the removal of AEA from solution by fly ash was divided into non-proportional adsorption (NPA) and proportional adsorption (PA). NPA was found to be reversible, resulting in a three-phase equilibrium among NPA, PA, and AEA remaining in solution. A new method was developed to obtain adsorption capacities that are not affected by the fly ash-to-solution ratio used in the test and thus can help understand the AEA distribution in the system with high solid-to-solution ratios that adsorption tests cannot simulate, such as concrete mixtures. In addition, NPA was shown to be primarily related to complexation between AEA and calcium present in the mixture due to the presence of cement and fly ash.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Minerals Flotation and Separation Techniques · Coagulation and Flocculation Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
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