Abstract
Information on the effect of age on the tensile behavior of fiber-reinforced alkali-activated slag-based composite is fairly limited. Therefore, the purpose of this study is to experimentally investigate the effect of age on the compressive strength and tensile properties of the fiber-reinforced alkali-activated slag-based composite. A binder including slag and alkali activators, chemical admixtures, and a reinforcing fiber were selected, and the mixture proportion was determined to make a fiber-reinforced alkali-activated slag-based composite with high ductility. Compressive strength and tensile strength tests were performed, and values were measured at 3, 5, 7, 14, 28, and 90 days. Test results showed that the compressive strength increased as the age increased. Although the first-cracking strength increased like the compressive strength, the increases of tensile strength and tensile strain capacity were not significant compared with those of compressive strength and first-cracking strength.
Highlights
More concrete is produced and consumed than any other synthetic materials on earth, and the amount of concrete used as a construction material is nearly twice that of all other industrial construction materials combined, including wood, iron, plastic, and aluminum [1]. is is attributed to the fact that concrete has high compressive strength and high durability; it is inexpensive compared to other construction materials
A highly ductile fiber-reinforced cementitious composite has been developed; this material is characterized by high ductility and strain-hardening behaviors [7]
Compressive strength was measured in accordance with ASTM C109-07 [23], and the uniaxial tensile test and test setup were performed in accordance with Japan Society of Civil Engineers (JSCE) recommendations [22]
Summary
More concrete is produced and consumed than any other synthetic materials on earth, and the amount of concrete used as a construction material is nearly twice that of all other industrial construction materials combined, including wood, iron, plastic, and aluminum [1]. is is attributed to the fact that concrete has high compressive strength and high durability; it is inexpensive compared to other construction materials. Exhibits relatively low tensile strength—approximately 10% of its compressive strength—and inherently brittle behavior [2]. To overcome these mechanical limitations, fiber-reinforced concrete incorporating discrete short fibers has been developed [3,4,5,6]. A highly ductile fiber-reinforced cementitious composite has been developed; this material is characterized by high ductility and strain-hardening behaviors [7]. Another problem of concrete is the large amount of carbon dioxide emitted during its manufacture [8]. It has been reported that the cement industry emits approximately 5% of total human-produced carbon dioxide [9, 10]
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