Evaluation of the green coconut fiber compatibility with cement by using different calculation methods

Abstract

Using all the different methods reported in the literature, the compatibility of coconut green fiber with Portland cement in five different compounds was evaluated. For each trace, the mixtures hydration curves (temperature x time) were obtained by the use of type K thermocouples and an analog signal receiver. Based on a unique set of experiments with coconut fiber, a comprehensive critical review of the methods reported in the literature was performed to evaluate fiber-cement compatibility. Contradictory results about compatibility classification were obtained using different compatibility equations. The correlations between compatibility and compressive-strength essays results were considered to support our choice of the best method of compatibility calculation. Greater sensitivity to capture the differences in the compositions of mixtures and a higher correlation with the compressive strength of composites revealed that the CX calculation method, which considers the heat release rate as a basic parameter, presented more realistic results.