Durability of the Reinforced One-Part Alkali-Activated Slag Mortars with Different Fibers

Abstract

This paper investigates the effects of reinforcing one-part alkali-activated slag binders (OAASs) with different types of fiber (steel, polyvinyl alcohol [PVA], basalt, and cellulose) and fiber combinations (single and hybrid) on the mechanical and durability properties of OAASs. All OAASs were reinforced by a 1% fiber volume fraction. Compressive and flexural strengths were the mechanical properties, which were addressed. The durability of the reinforced OAASs was examined based on water absorption by immersion and capillary, acid resistance, high temperature resistance, carbonation resistance, and freeze/thaw resistance. The experimental results showed that the fiber type and combination greatly affects the mechanical and durability properties of OAASs. Moreover, the influence of fiber type and combination on high temperature resistance and freeze/thaw resistance is greater than the influence on acid resistance and carbonation resistance. Graphic AbstractKeywords One-part alkali activated binders · Fiber reinforced mortars · Mechanical and durability properties · Fiber type · Fiber combination * Z. Abdollahnejad

Fresh State, Rheological and Microstructural Characteristics of Alkali-Activated Mortars Developed Using Novel Dry Mixing Technique under Ambient Conditions

“…Various factors associated with this technique limit the commercial application or large-scale production of these materials. The first factor is using highly alkaline solutions and the heat curing of specimens to achieve desired mechanical and durability characteristics comparable to cement-based systems [4][5][6]. Additionally, preparing large quantities of these corrosive and viscous solutions creates a hostile environment for workers.…”

“…Additionally, preparing large quantities of these corrosive and viscous solutions creates a hostile environment for workers. The requirement of elevated temperature curing is energy-intensive, increases production costs and hinders construction applications [5,6].…”

“…These one-part geopolymers developed in ambient curing conditions by adding water to the pre-blended dry mix of precursors and reagents can obtain comparable mechanical and microstructural characteristics to cement-based systems [7,8]. Moreover, the powder form reagents are required in significantly lesser quantities than their counterpart alkaline solutions typically used in the two-part system, which would reduce the production costs of the binders, making them commercially viable [6][7][8].…”

Strength, Shrinkage and Early Age Characteristics of One-Part Alkali-Activated Binders with High-Calcium Industrial Wastes, Solid Reagents and Fibers

“…The two-part mixing technique is an energy-intensive production process that reduces the commercial viability of geopolymers [13,14]. In addition, handling large quantities of solution-based alkaline reagents creates an undesirable environment for workers during construction applications [15][16][17]. Using a one-part mixing technique to produce AABs by just adding water (like cement-based binders) to the blended mix of precursors and solid/powderbased reagents can resolve issues associated with the two-part production technique.…”

Self-Sensing Alkali-Activated Materials: A Review

“…Following this, water is added and mixed until a homogenous mix is achieved. Contrary to the two-part mixes, filler is incorporated at the end and is gradually added in small amounts to ensure proper dispersion and uniform distribution [61][62][63][64]. It is reasonable to assume that the conductive filler could potentially be sonicated in the water and then added to the mix.…”