Journal Published Online: 02 December 2024
Volume 13, Issue 1

Effect of Cement/Silica Ratio, Aluminum Hydroxide, Temperature, and Time on the Modulus of Rupture of Fibercement Composites

CODEN: ACEMF9

Abstract

This study investigates the effect of aluminum hydroxide (1 and 7 %), cement/silica ratio (30 and 60 %), autoclave temperature (175°C and 184°C), and curing time (8 and 16 h) on the modulus of rupture (MOR) of fibercement composites using a factorial design of experiments. The cellulose fibers, the water, and the plasticizer were fixed in the experiment. All the components were mixed and stirred until a homogeneous, moldable, and compacted paste was obtained. The samples were cured in an autoclave chamber. Physical properties such as morphology, structure, density, and water absorption were tested. The results show that the cement exhibits crystallinity. Excessive crystallization of its constituents occurs when the autoclave conditions are increased. Changes in composition and curing conditions have a slight effect on the density, a moderate effect on the water absorption capacity, and a strong effect on the MOR with variations of 5, 12, and 42.7 %, respectively. The cement/silica ratio and temperature were shown to be the most important variables in the experimental design. The factors that did not influence MOR were aluminum hydroxide concentration and autoclaving time. The MOR of the boards was improved by increasing the cement/silica ratio and reducing the temperature.

Author Information

Hincapié Rojas, Daniel Fernando
Grupo de Investigación en Física y Matemáticas con Énfasis en la Formación de Ingenieros, Facultad de Ingeniería, Departamento de Física y Matemáticas, Universidad Autónoma de Manizales, Manizales, Caldas, Colombia
Moscoso Londoño, Oscar
Grupo de Investigación en Física y Matemáticas con Énfasis en la Formación de Ingenieros, Facultad de Ingeniería, Departamento de Física y Matemáticas, Universidad Autónoma de Manizales, Manizales, Caldas, Colombia
Londoño Calderón, César Leandro
Grupo de Investigación en Física y Matemáticas con Énfasis en la Formación de Ingenieros, Facultad de Ingeniería, Departamento de Física y Matemáticas, Universidad Autónoma de Manizales, Manizales, Caldas, Colombia
Bailey, Douglas Allen
Grupo de Investigación en Física y Matemáticas con Énfasis en la Formación de Ingenieros, Facultad de Ingeniería, Departamento de Física y Matemáticas, Universidad Autónoma de Manizales, Manizales, Caldas, Colombia
Escobar Rincón, Daniel
Grupo de Investigación en Física y Matemáticas con Énfasis en la Formación de Ingenieros, Facultad de Ingeniería, Departamento de Física y Matemáticas, Universidad Autónoma de Manizales, Manizales, Caldas, Colombia
Pineda Gomez, Posidia
Grupo de Investigación en Magnetismo y Materiales Avanzados, Departamento de Física y Química, Universidad Nacional de Colombia, Manizales, Caldas, Colombia
Pages: 16
Price: $25.00
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Stock #: ACEM20230141
ISSN: 2379-1357
DOI: 10.1520/ACEM20230141