The Influence of Fiber on the Mechanical Properties of Geopolymer Concrete: A Review

Abstract

Geopolymer is widely used as a supplement to cementitious composites because of its advantages of low carbon and environmental protection, and geopolymer concrete is also broadly used in practical engineering. In recent years, geopolymer concrete has attracted increasing interest owing to its superior mechanical properties, and a series of research results have been obtained. In this paper, from the preparation of geopolymer concrete, based on the characteristics that geopolymer concrete is brittle and easy to crack, the types and basic properties of fibers to enhance the toughness of concrete are analyzed, the advantages and disadvantages of different fibers used as a material to enhance the toughness of concrete are summarized, and we review the effects of type, shape, volume rate, aspect ratio, and hybrid fiber combinations on the static mechanical properties. The results indicate that fibers have significant potential to enhance the compressive strength, splitting tensile strength, flexural strength, and fracture toughness of geopolymer concrete, and the optimal fiber volume rate seems to be related to the fiber type. Whereas the effect of aspect ratio and hybrid fiber combinations on the properties of geopolymer concrete seems to be obvious. This paper reviews the influence of fiber on the basic mechanical properties of geopolymer concrete, which provides a solid foundation to promote the further development and application of the research on the toughness of fiber-reinforced geopolymer concrete and provides recommendations for future research.

Use of Geopolymer and Carbon Fiber-Reinforced Polymer for Repairing Reinforced Concrete Deck Soffit

“…The test results were recorded in accordance with the guidelines outlined in ASTM C490/C490M-21 [ 31 ]. Following solidification, all specimens were carefully demolded, and their lengths were measured to be 28.5 cm.…”

“…Notably, it exhibits an environmentally friendly composition that diminishes reliance on natural resources and promotes the recycling of industrial waste. Moreover, geopolymer material possesses a reduced carbon footprint, improved durability, and exceptional versatility, enabling customization to suit particular application needs [ 30 , 31 , 32 ]. It is worth noting that existing literature primarily concentrates on examining the efficacy of geopolymer materials in repairing cracks [ 33 , 34 , 35 , 36 ], while research specifically comparing inclined surface repair methods remains limited.…”

Mechanical Properties of MiniBars™ Basalt Fiber-Reinforced Geopolymer Composites

“…Under the action of the load force on the cement matrix, microcracks could be reduced or stopped and the flexural resistance can be improved [ 12 ] The addition of glass fiber to reinforce geopolymer concrete increases tensile strength by 5–10% [ 13 ]. The performance of fiber-reinforced materials mainly depends on the fiber content, their arrangement, their type, dimensions, and their compatibility with the cement matrix [ 11 , 14 ].…”

Structure and Properties Improvement by Recipe Factors of Geopolymer Basalt Fiber Reinforced Concrete for Building Enclosing Structures

“…In terms of the closest analogues of geopolymer concrete, namely cement concrete, the technology of fiber reinforcement is being widely developed and improved. Dispersed fiber, called fiber, produced from various materials, be it steel, basalt, polypropylene or other materials, is a very promising modifying additive that can significantly improve the mechanics and physics of the properties of cement concrete [31][32][33][34][35]. Geopolymer concrete, as a construction conglomerate, is no exception in terms of the prospects of reinforcing it with fiber.…”