Examinando por Materia "Compression resistance"

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    Comparison of the roughness and compressive strength of type IV plasters subjected to manual and non-manual vibration according to time variation in vitro 2022
    (Universidad Privada Norbert Wiener, 2023-07-07) Sanchez Veramendi, Yoselina; Morante Maturana, Sara Angelica
    The purpose of this research was to compare the roughness and compression resistance of Type IV plasters subjected to manual and non-manual vibration, according to time variation. The study employed an applied methodology with an experimental, cross-sectional, prospective, and comparative design. The population consisted of two Type IV plasters subjected to manual and non-manual vibration, with a total of 120 plaster blocks from both brands. The sample consisted of 60 sample units for each commercial brand, subdivided into two groups of 30 units each, with 15 units measured at 30 minutes and 15 units at 60 minutes for compression and roughness measurements, respectively. A non-probabilistic convenience sampling was used according to the researcher's criteria. Two data collection forms were used: one for measuring compression resistance and another for measuring roughness, with the plasters used being Fujirock and Elite Rock. Results: Significant differences were observed when comparing the roughness between Elite Rock Type IV plaster and Fujirock, with a p-value of 0.001 (p < 0.05), and also in compression between Elite Rock Type IV plaster and Fujirock, with a p-value of 0.000 (p < 0.05).