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Evaluation of the Fresh Properties of Cement Pastes: Part I—Response Models Applied to Changes in the One-Variable-at-a-Time Method
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Orientador(es)
Resumo(s)
The workability of cement-based materials is one of the features that makes these con struction materials the most used worldwide. Measuring and understanding how cement-based
constituent materials affect fresh properties depends on the experimental plans. The experimental
plans deal with the constituent materials used, the tests carried out, and the run of experiments.
Here, the fresh properties (workability) of cement-based pastes are evaluated based on the diameter
in the mini-slump test and the time in the Marsh funnel test being measured. This overall study is
composed of two parts. In Part I, tests were carried out on several cement-based paste compositions
incorporating distinct constituent materials. The effects of the distinct constituent materials on the
workability were analyzed. Furthermore, this work deals with an approach to the run of experiments.
A typical run of experiments was applied, with basic sets of mixed compositions being studied by
only changing one input parameter at a time. This approach used in Part I is faced with a more
scientific approach applied in Part II of the work where, based on the design of experiments, multiple
input parameters were changed at a time. This work showed that a basic run of experiments is
quick and easy to apply and leads to results for simple analyses; conversely, it lacks information
for advanced analyses and scientific conclusions. The tests carried out included studies on the
effect on the workability caused by changes in the limestone filler content, the type of cement, the
water-to-cement ratio, distinct superplasticizers, and shrinkage-reducing admixture.
Descrição
Palavras-chave
Approach Cement paste Fresh properties Modelling Trial–error . Faculdade de Ciências Exatas e da Engenharia
Contexto Educativo
Citação
Maia, L. Evaluation of the Fresh Properties of Cement Pastes: Part I—Response Models Applied to Changes in the One-Variable-at-a-Time Method. Materials 2023, 16, 4139. https://doi.org/10.3390/ ma16114139
Editora
MDPI