Abstract
The expansive mortar is constituted by a mixture of watery phase with an agent expander, when hydrated, presents volume increase and the generation of fictions in the rock due to generated pressure. The objective of this work is to synthecize expansive mortar that they present enough expansive pressure for the dismounting of granite and marble. They had been used as raw materials: carbonate of calcium, Portland cement and additives for control of the expansion. The formularizations had been synthecized on the basis of the chemical analysis of a mortar commercial and characterized by XRD, laser particle size measurements and evaluation of expansive pressure. All the developed formularizations had presented similar characteristics to the ones of the commercial mortar.
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