Navegando por Autor "Silva, Jéssica Ferreira da"

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Análise dos tipos de cura e sua influência no ganho de resistência à compressão em um concreto convencional
(2019-07-08) Silva, Jéssica Ferreira da; Galvão, Simone Perruci; http://lattes.cnpq.br/1523292800241605
The curing procedure consists of protecting the surface of the concrete from the environment to which it is exposed, avoiding the excessive loss of water from kneading and early formation of cracks. Is essential for the development of concrete strength and for its integrity in the first moments of the hydration. The order to analyze the different curing methods and their influence on the property of characteristic resistance to the compression of a conventional concrete for 30MPa, it work examined three types of cure, among them: thermal cure at 70ºC, wet cure by immersion in water and wet cure by immersion in calcium hydroxide solution. For the thermal curing a device was developed using the Arduino so that the expected conditions were reached. From the analysis obtained in this work it was observed that the thermal and wet curing by immersion in water were more effective at the age of 7 days, compared to the wet curing in saturated lime solution. At 28 days, the cure by immersion in calcium hydroxide solution showed the highest strength gain compared to other types of cure, showing an increase of 1.42 MPa compared to the cure made by immersion in water for 3 days, and 1.97 MPa in relation to thermal cure.