Particle size distribution of GGBS and bleeding characteristics of slag cement mortars

Olorunsogo, F.T.

doi:10.1016/s0008-8846(98)00042-8

Cited by 41 publications

(6 citation statements)

References 2 publications

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“…Previous studies have shown that coarser mean particle diameters or larger ranges in particle size could increase the bleeding rate of a mixture. [16] Also, the spherical shape of FA has been shown to lower particle friction and increase concrete bleeding. [21] Among all the raw materials used, GGBFS has the smallest mean particle diameter and highest Blaine surface area.…”

Section: Journal Of Sustainable Cement-based Materials 225mentioning

confidence: 99%

Bleeding of SCC pastes with fly ash and GGBFS replacement

Sun

Young²

2014

Journal of Sustainable Cement-Based Materials

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In this paper, the influences of using large percentages of Class F fly ash (FA) and ground granulated blast-furnace slag (GGBFS) on bleeding capacity, bleeding rate, and other early-age properties of self-consolidating concrete (SCC) pastes were investigated. Seven mix proportions were studied, and they were a control mixture, two binary FA mixtures, two binary GGBFS mixtures, and two ternary FA and GGBFS mixtures. The water-to-binder ratio was kept constant for all the mixes. Target slump flow diameter values were achieved by modifying the superplasticizer dosage. Bleeding, early-age compressive strength, and hydration heat were tested for each mix. The bleeding tests found that, for the studied water-to-binder ratio, both the Class F FA and GGBFS increased the bleeding capacity, rate, and duration of the SCC pastes. Class F FA increased the bleeding properties more than GGBFS did.

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Section: Journal Of Sustainable Cement-based Materials 225mentioning

confidence: 99%

Bleeding of SCC pastes with fly ash and GGBFS replacement

Sun

Young²

2014

Journal of Sustainable Cement-Based Materials

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“…where 2 0, 1 ð Þ is the index for distinguishability. A value of 0.5 is used in most situations [18]. As there are too many relational coefficients to be compared directly, further data reduction makes use of average-value processing to convert each sequence into its mean.…”

Section: Principles Of Gramentioning

confidence: 99%

Gray Relational Analysis between Size Distribution and Impact Strength of Polypropylene/Hollow Glass Bead Composites

Liang

2008

Journal of Reinforced Plastics and Composites

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The impact strength of V-notched U-notched and non-notched specimens of hollow glass bead filled polypropylene composite (PP/HGB) were measured by using Charpy impact tester, and the directed gray relational grade (GRG) between the HGB size distribution and the impact strength of the composites was determined by means of gray relational analysis (GRA) in order to investigate the influence of the HGB size distribution on the impact strength of the composites. The results indicated that the particles with size range from 0.00 to 24.7 mm have a positive influence on the impact strength of the composites, and the particles with size ranging from 18.90 to 24.7 mm have a greater positive influence than that of the particles with size range from 0.00 to 18.9 mm. While the particles with size ranging from 24.72 to 256.0 mm have a negative influence, especially the particles with size in a range from 100.60 to 256.0 mm. That is, the impact strength of the composites could be enhanced by increasing the particle content in the tested fillers with size range from 0.00 to 27.72 mm especially the particles with size ranging from 18.90 to 24.7 mm, whereas decreasing the particles content with size range from 24.72 to 256.0 mm, especially the particles with size range from 100.60 to 256.0 mm.

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“…They 10 attributed this to bleeding, which in turn leads to the increased porosity and deformability of concrete. Olorunsogo 11 investigated the impact of ground granulated blast furnace slag (GGBS), and the different particle size distribution (PSD) of GGBS, on bleeding in cementitious mortars. He observed that the addition of GGBS to the mix leads to a decrease in the bleeding rate, and also that the PSD does not have a vital impact on bleeding.…”

Section: Introductionmentioning

confidence: 99%

The influence of granite powder waste and the addition of fly ash on concrete bleeding

Chajec

Kwietniowski

Woźniak

et al. 2022

Structural Concrete

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Bleeding is a common problem in concrete slabs, and may lead to serious damage. The goal of this article is to understand the impact of alternative binders and their properties on the bleeding of concrete. Therefore, the impact of the type of binder on the bleeding process is investigated. The results show that the addition of granite powder or fly ash allows for the increased control of the bleeding process. It was found that a finer particle size distribution (PSD), an increased specific surface area (SSA), and a higher bulk density may reduce the amount of dispensed water in the concrete mix. Furthermore, the use of additives with an increased SSA leads to even a 30% reduction of the bleeding rate of mixes. The utilization of additives with a finer PSD than cement enables a 37% reduction of the bleeding rate of mixes. The influence of bleeding on compressive strength was assessed using destructive and non-destructive tests: Replacing 30% of cement with granite powder leads to a 30% reduction of concrete strength after 28 days of curing; on the other hand, replacing 30% of cement with siliceous fly ash leads to an 18% reduction of strength. Importantly, bleeding was also found to lead to the heterogeneity of the physical and mechanical properties across the concrete section. Consequently, the proper control of the bleeding process leads to more homogeneous properties of concrete across its cross-section.

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Particle size distribution of GGBS and bleeding characteristics of slag cement mortars

Cited by 41 publications

References 2 publications

Bleeding of SCC pastes with fly ash and GGBFS replacement

Bleeding of SCC pastes with fly ash and GGBFS replacement

Gray Relational Analysis between Size Distribution and Impact Strength of Polypropylene/Hollow Glass Bead Composites

The influence of granite powder waste and the addition of fly ash on concrete bleeding

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