Examinando por Materia "Yeso tipo IV"

Mostrando 1 - 2 de 2

Acceso abierto
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).
Acceso abierto
Evaluation of resistance to compressive forces in three types of plaster iv according to post setting time
(Universidad Privada Norbert Wiener, 2023-11-27) Vargas Cueva, Gregori Christian; Morante Maturana, Sara Angelica
The objective of the study was to evaluate the resistance to compressive forces in three types of Type IV gypsum from the brands GC, Zhermack, and Protechno according to post-setting time. The methodology used a quantitative, cross-sectional, and prospective approach with a sample of 45 gypsum die models in total, subdivided into three groups of 15 die models for each brand under study. Inclusion criteria were considered, such as models or molds with a diameter of 20 mm and a height of 40 mm, without bubbles or cracks in their formation. The observational technique was used for recording measurements in the data collection sheet. Results showed, according to post-setting time, the compressive forces at 15 minutes for Protechno (Kimberlit) had an average of 16.612, GC (Fujirock) had an average of 6.752, and Zhermack (Elite rock) had an average of 22.53. At 30 minutes, Protechno (Kimberlit) had an average of 22.528, GC (Fujirock) had an average of 12.044, and Zhermack (Elite rock) had an average of 24.296. At 60 minutes, Protechno (Kimberlit) had an average of 18.352, GC (Fujirock) had an average of 24.33, and Zhermack (Elite rock) had an average of 31.18. Conclusion: Zhermack (Elite rock) exhibited the highest compressive force resistance values with an average of 22.53, median of 22.68 at 15 minutes, average of 24.296, median of 25.14 at 30 minutes, and average of 31.18, median of 28.79 at 60 minutes.