BEZERRA, M. A.; BEZERRA, Mauro Araújo.
Resumo:
The present work was developed at the Center of Science and Technology of the Federal University of Paraíba (CCT / UFPb), Campina Grande, State of Paraíba, Brazil. The objectives of this study were to study the stabilization of a sandy soil with cement and to determine its optimum composition in relation to the compacted soil-cement and soil-plastic cement mixtures for channel coating. The parameters used to determine the optimal composition of the abovementioned mixtures were the percentages of cement and water, where 54 combinations of these contents were studied. A soil collected in the CCT / UFPb itself was used, which, when classified by the Highway Research Board (H R B), was found to be from Group A2 - h. The methodology used in the Brazilian Association of Portland Cement (ABCP), for wetness and drying (SC-3) and simple compressive strength tests (SC-4 method), was used in the various types of specimens rehearsed The Brazilian test of indirect voltage (E B T I) was also carried out, thus completing the study of the influences that cement and water percentages cause in the stabilization of said soil. Within the limitations of this research, considering the stabilization of the sandy soil A2 - k (0) with cement for use in channel coating, the analysis of the results indicates that the optimum composition of the compacted soil - cement and soil - cement mixtures plastic material should contain, respectively, 10.0% and 12.0% molding moisture relative to the mass of the dry material. As to the content of cement, it is advisable to use for both mixtures at a rate of 8,0% since they fully meet the ABCP specifications. Taking into account the results of the study developed in this research, it can be stated that the mixtures in focus had resistance and durability by wetting and drying technically advisable as building materials and should therefore be tested in coating of channels for appreciation of the effects caused by the environment and, consequently, so that its maintenance and conservation expenses, its useful life, as well as the other parameters necessary for a complete economic analysis can be determined with exactitude.
