Key mechanisms controlling internal curing performance of natural fibers

Jongvisuttisun, Passarin; Leisen, Johannes; Kurtis, Kimberly E.

doi:10.1016/j.cemconres.2018.02.007

Cited by 45 publications

(26 citation statements)

References 44 publications

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“…The concept of self-curing concrete or mortar is to reduce the evaporation of water in concrete and improve the water retention capacity in concrete [27][28][29][30]. As a result, the technique has been readily introduced where water-filled internal curing agents acting as reservoirs are added to the concrete mixture which will gradually release water during hydration and evaporation process [31][32][33][34], as illustrated in Figure 2. High-performance concrete (HPC) mixtures were initially developed given the growing issues regarding concrete durability [35,36] and due to the use of lower water-cementitious (w/c) material ratios, in addition to chemical admixtures and supplementary cementitious material (SCMs).…”

Section: Self-curing Agent and Mechanism In Cementitious Materialsmentioning

confidence: 99%

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

et al. 2022

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Self-cured concrete is a type of cement-based material that has the unique ability to mitigate the loss rate of water and increase the capacity of concrete to retain water compared to conventional concrete. The technique allows a water-filled internal curing agent to be added to the concrete mixture and then slowly releases water during the hydration process. Many researchers have studied the composition of self-curing concrete using different materials such as artificial lightweight aggregate (LWA), porous superfine powders, superabsorbent polymers (SAP), polyethylene glycol (PEG), natural fibers, and artificial normal-weight aggregate (ANWA) as curing agents. Likewise, physical, mechanical, and microstructure properties, including the mechanisms of curing agents toward self-curing cement-based, were discussed. It was suggested that adopting self-curing agents in concrete has a beneficial effect on hydration, improving the mechanical properties, durability, cracking susceptibility behavior, and mitigating autogenous and drying shrinkage. The interfacial transition zone (ITZ) between the curing agent and the cement paste matrix also improved, and the permeability is reduced.

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Section: Self-curing Agent and Mechanism In Cementitious Materialsmentioning

confidence: 99%

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

et al. 2022

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“…A similar study was conducted on white cement hydration system containing silica fume [113], and on the early hydration of alite and OPC [114]. The release of water by organic internal curing agents, also in white cement, has also been recorded with 1 H NMR, and the rate of moisture migration related to the composition and structure of the agent [115].…”

Section: H Nmr Relaxometrymentioning

confidence: 96%

Advances in characterizing and understanding the microstructure of cementitious materials

Monteiro

Geng

Marchon

et al. 2019

Cement and Concrete Research

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“…Secondly, coir fibers are hydrophilic and thus their high moisture absorption can cause competitive water absorption with cement, thereby affecting the available water amount for cement hydration [ 24 , 25 ]. Saturated fibers can be used to take advantage of this feature, thus, extra water can be entrained in the cement system for internal curing [ 26 ]. Nevertheless, few previous studies of NFs as reinforcements in concrete show the effect of their leachates, indicating a delayed effect on cement hydration [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, few previous studies of NFs as reinforcements in concrete show the effect of their leachates, indicating a delayed effect on cement hydration [ 27 ]. Furthermore, only several presented studies are related to the internal curing effect of macro saturated fibers [ 26 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Reinforcing Mechanisms of Coir Fibers in Light-Weight Aggregate Concrete

et al. 2021

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Due to the requirement for developing more sustainable constructions, natural fibers from agricultural wastes, such as coir fibers, have been increasingly used as an alternative in concrete composites. However, the influence of coir fibers on the hydration and shrinkage of cement-based materials is not clear. In addition, limited information about the reinforcing mechanisms of coir fibers in concrete can be found. The goal of this research is to investigate the effects of coir fibers on the hydration reaction, microstructure, shrinkages, and mechanical properties of cement-based light-weight aggregate concrete (LWAC). Treatments on coir fibers, namely Ca(OH)2 and nano-silica impregnation, are applied to further improve LWAC. Results show that leachates from fibers acting as a delayed accelerator promote cement hydration, and entrained water by fibers facilitates cement hydration during the whole process. The drying shrinkage of LWAC is increased by adding fibers, while the autogenous shrinkage decreases. The strength and toughness of LWAC are enhanced with fibers. Finally, three reinforcement mechanisms of coir fibers in cement composites are discussed.

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Key mechanisms controlling internal curing performance of natural fibers

Cited by 45 publications

References 44 publications

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

A Review on the Use of Self-Curing Agents and Its Mechanism in High-Performance Cementitious Materials

Advances in characterizing and understanding the microstructure of cementitious materials

Reinforcing Mechanisms of Coir Fibers in Light-Weight Aggregate Concrete

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