Hydration of Portland cement paste mixed with densified silica fume: From the point of view of fineness

Ni, Chenxin; Wu, Qiaojun; Yu, Zhaoju; Shen, Xiaodong

doi:10.1016/j.conbuildmat.2020.121906

Cited by 33 publications

(10 citation statements)

References 32 publications

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“…The improvement was due to the smaller particle size of DSF, which was said to be more effective in increasing the concrete's hydration rate than silica fume. Hence, the compressive strength of DSF+CBA concrete with CBA content was higher [31].…”

Section: Compressive Strengthmentioning

confidence: 91%

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Ban,

Ping,

Lapongan

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Coal bottom ash (CBA) is a significant waste produced by the coal manufacturing power plant, harming the environment. CBA has been used in many studies to replace sand in cementitious materials. However, few studies have investigated the use of CBA in concrete as a sand replacement with densified silica fume (DSF) as a cement replacement. DSF is a potential supplementary cementitious material (SCM) to combat the engineering properties of concrete that are typically decreased when CBA is used as a replacement for natural aggregate. Therefore, the present study aimed to evaluate the influence of DSF on the engineering properties of concrete containing different content of CBA as a partial replacement for natural sand. The mix design of the ordinary Portland cement (OPC) and binary blended concrete comprised 90% OPC and 10% DSF by total binder’s weight. The CBA as the fine aggregate replacement was used at 25%, 50%, 75%, and 100% by total aggregate volume. The mechanical, porosity, absorption performance of DSF and CBA (DSF+CBA) concrete containing CBA as partial aggregate replacement material were investigated. DSF+CBA with 50% CBA replacement showed improved mechanical strength performance than control by 15% at 28d and 5.6% at 56d of curing. However, the total porosity performance for DSF+CBA concrete decrease as CBA content increases. In conclusion, the DSF as SCM in binary blended concrete with CBA content up to 50% achieved a better performance in terms of mechanical properties even though the porosity was marginally increased.

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Section: Compressive Strengthmentioning

confidence: 91%

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Ban,

Ping,

Lapongan

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…SF can enhance concrete strength, reduce porosity, and extend the usable life of concrete structures. The filler effect of SF impacts the physical but not chemical processes [64,65]. Sonicated SF exhibits higher pozzolanic activity, generating more C-S-H phase [66,67] due to its higher specific surface area.…”

Section: Us-t Of Cementitious Materials/concrete and Scmsmentioning

confidence: 99%

Novel Processing Methods of Low-Clinker Multi-Component Cementitious Materials—A Review

Lisowski,

Glinicki

2024

Applied Sciences

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The wide use of multi-component cement of highly reduced Portland clinker factor is largely impeded by detrimental changes in the rheological properties of concrete mixes, a substantial reduction in the early rate of cement hardening, and sometimes the insufficient strength of mature concrete. Therefore, major changes are needed in traditional concrete-production technologies if low-clinker cement is to gain wider acceptance. This review’s goal is to summarize the impacts of using non-ionizing radiation methods to improve the dispersion of concrete mix constituents, cement setting, and early hardening. The potential impacts of such interactions on the permeability and strength of concrete are also highlighted and investigated. Their intriguing potential for delivering additional energy to cementitious mixtures is analyzed for batch water, solid non-clinker constituents of cement (mainly supplementary cementitious materials), and their mixtures with aggregates. The advantages of adopting these non-traditional methods are found to be highly alluring to the greener preparation techniques used in the construction materials sector.

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“…Since SF is a small spherical particle, it has a ball effect. Moreover, due to the size effect, the spherical silica particles are closely distributed in the MK void, which increases the fluidity of the geopolymer paste [26].…”

Section: Preparation Of Geopolymer Pastementioning

confidence: 99%

Influences of Multi-Component Supplementary Cementitious Materials on the Performance of Metakaolin Based Geopolymer

Wu¹,

Luo²,

Ding³

et al. 2022

Journal of Renewable Materials

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In this study, the workability and reaction mechanism of metakaolin (MK) based geopolymer blended with rice husk ash (RHA) and silica fume (SF) was investigated. The prepared samples were subjected to tests including compressive strength and fluidity tests. X-ray diffraction (XRD) and Scanning electron microscope (SEM) were employed to explore the phase composition and microstructure of geopolymers. The molecular bonding information of geopolymer was provided by Fourier transform infrared spectroscopy (FTIR). Meanwhile, the porosity of geopolymer was obtained by Mercury intrusion porosimeter (MIP) analysis. The high-activity RHA obtained after calcination at 600°C was used as a supplementary cementitious material to prepare geopolymer. The properties of preventing morphology cracking and compressive strength are improved. The addition of RHA and SF changes the working performance of MK based geopolymer and provided a theoretical basis for future practical applications. Meanwhile, the high chemical activity of SF and RHA contributes to the healing of microcracks.

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Hydration of Portland cement paste mixed with densified silica fume: From the point of view of fineness

Cited by 33 publications

References 32 publications

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Novel Processing Methods of Low-Clinker Multi-Component Cementitious Materials—A Review

Influences of Multi-Component Supplementary Cementitious Materials on the Performance of Metakaolin Based Geopolymer

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