Predictive model to determine the compatibility of lignocellulosic fibers with cement

The chemical and physical compatibility of lignocellulosic fibers with the cement matrix plays a fundamental role in determining the properties of the composite, such as durability and mechanical strength. The compatibility models, which have been developed up to now, provide information after the fiber has been mixed with the binder by constructing the composite hydration curve of temperature vs. tempo. There is still no predictive method of measuring compatibility, that permit to verify the influence of the physical and chemical characteristics of the lignocellulosic fibers on the behavior of greater or lesser compatibility with the cement. Therefore, the aim of the work was to develop a predictive model of compatibility (CPC) between lignocellulosic fibers and cement that does not need to do the hydration curve of the mixtures. The proposed CPC compatibility model takes into account the physical variables; specific mass and degree of swelling and chemical variables; content of total soluble solids, sugars and tannins in lignocellulosic fibers previously obtained. This information provides an alternative measure of compatibility comparable to the calculation model (CX), with the same degree of reliability and validity. Additionally, easier to obtain and achievable in a simpler laboratory.