On mitigating rebar–concrete interface damages due to the pre-cracking phenomena using superabsorbent polymers

Mousavi, Seyed Sina; Ouellet-Plamondon, Claudiane; Guizani, Lotfi; Bhojaraju, Chandrasekhar; Brial, Victor

doi:10.1016/j.conbuildmat.2020.119181

Cited by 22 publications

(9 citation statements)

References 54 publications

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“…When the SAP particle size was 0.3 mm, more pores of less than 800 microns existed in the concrete, which mainly affected the concrete strength. In addition, the SAP chemistry has a significant impact on the mechanical characteristics [28]. The effects of the SAP particles with different chemistry adopted in this paper on the curing approach of concrete were different, which could also be explained by this unusual trend.…”

Section: Compressive Strengthmentioning

confidence: 84%

“…Although a lower w/c being was used in previous studies, the values of w/c = 0.3 and w/c = 0.37 were selected to improve the volume stability and durability of the concrete. It was also obtained that the SAPs should be added at 0.0-1.0% of cement, as suggested by Mousavi [28]. SAP particles absorb water during mixing and reduce the concrete's workability.…”

Section: Test Proceduresmentioning

confidence: 90%

“…Comparing mixtures with different workability is not accurate, based on the energy needed for compacting the specimens. Hence, additional water needed to be added to the concrete mixture, and this could be determined using the methods suggested by Mousavi and Powers [28,34]. The mix proportion scheme of the cement concrete is shown in Table 2.…”

Section: Test Proceduresmentioning

confidence: 99%

“…However, the impact of the particle size on the loss of concrete strength is controversial. Mousavi [28] found that small particle size can lead to more pores in concrete, while Snoeck [36] reported that small particle size can lead to greater strength loss. Meanwhile, this paper concluded reductions of 9.04%, 5.00%, and 13.60% in the compressive strength for 0.15-, 0.3-, and 0.6-mm SAP particles, respectively.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…The influence of the pore parameters of the concrete on the antifreeze performance was also studied [25][26][27]. An increase in the number of cement holes and small pores was obtained, which refined the concrete structure [28]. It was explained that the frost resistance and durability of concrete can be improved by SAP from the micro point of view [14,23,24].…”

Section: Introductionmentioning

confidence: 98%

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Effect of Superabsorbent Polymer on the Mechanical Performance and Microstructure of Concrete

2021

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The internally cured material known as superabsorbent polymer (SAP) is an important innovation in concrete engineering technology. This paper investigates the effect of adding a polymer with superabsorbent capabilities on the physical and mechanical performance of concrete. The microstructure of the new hybrid concrete was also studied, and the influence of the polymer particle size and volume on the mechanical durability was evaluated. The mechanical properties of the new hybrid concrete, such as compressive strength, flexural strength, elastic modulus, and splitting tensile strength, were measured through laboratory experiments. The microstructure characteristics of the concrete were also investigated by scanning electron microscopy (SEM). The results show that shrinkage was reduced, while the volume stability of the concrete improved. Moreover, we found that cracking was reduced, while issues such as chloride penetration and freeze-thaw resistance were also improved. In addition, the SAP could effectively improve the microstructure of the concrete and refine the pore structure, as seen in the microscopic test. This paper helps to promote the development of internally cured material and improve technology for the prevention of concrete construction cracks.

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Section: Compressive Strengthmentioning

confidence: 84%

Section: Test Proceduresmentioning

confidence: 90%

Section: Test Proceduresmentioning

confidence: 99%

Section: Compressive Strengthmentioning

confidence: 99%