Effect of the rheological properties of fresh binder on the compressive strength of pervious concrete

Park, Sungwoo; Ju, Suhawn; Kim, Hyeong-Ki; Seo, Yo-Seob; Pyo, Sukhoon

doi:10.1016/j.jmrt.2022.01.045

Cited by 23 publications

(13 citation statements)

References 35 publications

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“…A total of six mix designs were prepared: two for each of three binder types: 100% OPC (C100), 40% OPC and 60% GGBFS (C40G60), and 100% GGBFS (G100). To achieve the target porosity, the bulk porosity of aggregate was measured and binder was allowed to fill the pores by subtracting the desirable porosity (Park et al, 2022). The two mix proportions for each binder were designed to have two target porosities of 10% (P10) and 15% (P15) to study the effect of adhesion force with larger volume of binder and to attain a higher strength pervious concrete.…”

Section: Designmentioning

confidence: 99%

“…Table 3 depicts the flow test results of the binders with different amounts of SP, which was added by the weight percent of the binder. A medium flow of approximately 210-220 mm is deemed suitable according to (Park et al, 2022) and was selected for this study. In the case of G100, the addition of 0.05% SP gave a medium flow of 210 mm.…”

Section: Designmentioning

confidence: 99%

“…When the subjected initial gap touched the sample, the extra materials on the edge were removed. If the shearing surfaces are smooth, slippage can occur (Park et al, 2022). To avoid slipping between the binder and the plates, sandpaper was attached onto the plates.…”

Section: Rheologymentioning

confidence: 99%

“…The fresh paste tends to be stiffened when the amount of solid content increases, which leads to a higher viscosity and dynamic yield stress (Wang et al, 2018). Meanwhile, Park et al (2022) recently revealed that the adhesive force of the binder correlates with the compressive strength of concrete, and the flow of the binder affects the compressive strength of pervious concrete. When the flowability was not appropriate (either low or high), the binder was not uniformly distributed over the thickness of the specimen, which resulted in the segregation of the binder and aggregate (da Costa et al, 2021;Park et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, Park et al (2022) recently revealed that the adhesive force of the binder correlates with the compressive strength of concrete, and the flow of the binder affects the compressive strength of pervious concrete. When the flowability was not appropriate (either low or high), the binder was not uniformly distributed over the thickness of the specimen, which resulted in the segregation of the binder and aggregate (da Costa et al, 2021;Park et al, 2022). The flowability has a strong relation to adhesion properties between the binder and coarse aggregate; a low flowability caused the presence of more binder at the top portion of the specimen (da Costa et al, 2021), while a high flowability resulted in the settlement of more binder to the bottom (Park et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of GGBFS-Based Pervious Concrete Considering Rheological Properties of the Binder

Oinam

Gwon

et al. 2022

Int J Concr Struct Mater

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To mitigate environmental challenges, such as urban flooding, noise pollution, and the urban heat island effect, pervious concrete has been developed. This research was intended to develop pervious concrete made from ground granulated blast furnace slag (GGBFS) to further decrease the environmental impact of the construction sector by reducing the content of ordinary Portland cement (OPC). The primary objective of the mix proportion was to maximize water permeability while meeting the required compressive strength. Two levels (60 and 100%) of OPC replacement by GGBFS were evaluated and compared to OPC-only concrete, and two target porosities (10 and 15%) were achieved by modifying the binder-to-aggregate ratio. CaO and CaCl2 were utilized as an activator and an accelerator, respectively, for the GGBFS only binder. Characteristics of the pervious concrete were determined with the compressive strength, porosity and water permeability test. Meanwhile, the effects of the rheological properties of binders on the water permeability and compressive strength of pervious concretes was evaluated. According to the results, the permeability of pervious concretes always exhibited a positive correlation with porosity, regardless of binder type. Although, the pervious concrete made with CaO-activated GGBFS has a lower compressive strength than the other two cases (60% GGBFS and only OPC), it still meets the minimum strength requirement. Based on the rheology studies of binder, it was found that, the adhesion force of the binder and the compressive strength of the pervious concrete decreases, as evaluated by rheology studies on binders. The CT scan revealed that when the adhesive force of the binder was weaker, the local porosity was higher (i.e., pore volume was larger) at the bottom of the specimen, which might be due to the limited consolidation and compaction of the binder between aggregate particles at the bottom due to its higher plastic viscosity.

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Section: Designmentioning

confidence: 99%

Section: Designmentioning

confidence: 99%

Section: Rheologymentioning

confidence: 99%