Effect of silica fume on the hardened and durability properties of concrete

Sivamani, Jagan; Neelakantan, T. R.

doi:10.1556/1848.2020.00129

Cited by 11 publications

(9 citation statements)

References 14 publications

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“…Also, an increase in SF content will decrease compressive strength gradually. This is because of the decrease in water content required to continue hydration process in RCC and the decrease in Ca(OH)2, making it work as a filler instead of cementitious materials [33][34][35]. It is clear from the results that indicated the most effective factor response to compressive strength previously was water content, according to Table (7), which was obtained from Taguchi analysis in the Minitab program.…”

Section: Compressive Strengthmentioning

confidence: 99%

Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method

Abed

Ahmed

Khalil

2023

ETJ

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Section: Compressive Strengthmentioning

confidence: 99%

Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method

Abed

Ahmed

Khalil

2023

ETJ

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“…This can be explained by the fineness of the silica SF grains, which makes it possible to fill the void between the cement grains, and significantly improves the other durability indicators, and more particularly, the chlorides diffusion and gas permeability. The precipitation of hydrates and SF constitute a physical barrier to the penetration of aggressive agents (CO2, Cl and others) (Jaganpand and Neelakantan, 2020).…”

Section: Durability Of Concretementioning

confidence: 99%

Effect of accelerated aging by temperature and moisture variation cycles on the durability of concrete

Houraira

Ouali²,

El-Hammoumi

et al. 2022

IJBPA

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PurposeMorocco is facing climate change, as shown by national studies conducted to date. The purpose of our research work is, on one hand, to develop an experimental protocol; simulating the Moroccan climate, through exposing concretes to accelerated aging in different cycles of temperature variation (+5 to +40 C°) and humidity (60–98% RH) and on another hand, to determine the effect of exposure to temperature and humidity variation cycles on the durability indicators (of concrete [with and without thermal cure]).Design/methodology/approachFor this purpose, three classes of concrete were studied (C35, C40 and C55). Each class of concrete was considered first with no addition of silica fume (SF) and then with a 10% addition of SF. The concrete samples underwent three types of conditioning before performing the tests. The control concretes (Ct) were demoulated after 24 h and stored under stable temperature and humidity conditions (20 ± 2 °C and 80% ± 5 RH). Treated concretes (CV) demouled after 24 h and exposed to 300 cycles of 12 h of temperature and moisture variation in a climate chamber. And finally, concretes that have undergone a heat cure (CTV) for 5 h at 90 °C, were then removed from the mold and exposed to temperature and moisture variations cycles identical to treated concrete (CV).FindingsThe results obtained show that aging accelerated by temperature change, and humidity improves durability indicators compared to Ct. Concretes that have undergone a thermal cure, followed by accelerated aging, show an improvement in durability indicators between 50 and 200 cycles, but the performance of concrete decreases after 200 exposure cycles. The addition of SF plays a beneficial role in the durability of concrete in the three exposure environments.Originality/valueThe originality of the work is, to develop an experimental protocol, simulating the Moroccan climate, through exposing concretes to accelerated aging in different cycles of temperature variation (+5 to +40 C°) and humidity (60–98% RH) and on another hand, to determine the effect of exposure to temperature and humidity variation cycles on the durability indicators of conventional concrete (with and without thermal cure).

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“…For that purpose, supplementary cementitious materials have been developed to replace part of the required cement [31]. These alternative materials include the reuse of waste such as fly ash, which can replace 15-30% of cement [32][33][34][35][36] and silica fume which replace cement by 5-25% [37,38]. There are other residues as well that have been used, such as ground granulated blast furnace slag [39], metakaolin [40,41], sewage sludge ash [42,43], rice husk ash [44], which can replace up to 20% of cement.…”

Section: Reducing the Amount Of Cement In The Concrete MIXmentioning

confidence: 99%

Different Approaches to Develop More Sustainable Concrete Alternatives

Pradena¹,

César²

2022

Sustainability of Concrete With Synthetic and Recycled Aggregates

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As important as it is, sustainability related with the concrete material is more than reducing the amount of cement in concrete mixes. In effect, there can be other types of contributions to a sustainable development using this fundamental material. The purpose of this book chapter is to analyse some of these approaches, in particular, concrete durability, reducing the amount of required concrete (and then cement) through innovative structural design, and reducing the amount of aggregates used in the concrete material. More specifically, examples and results obtained in Chile with biological self-healing concrete, thinner concrete pavements and concrete with industrial and domestic waste as partial aggregate replacement are included in the chapter. Due to its importance, the geo-dependency of the concrete material is addressed as well.

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Effect of silica fume on the hardened and durability properties of concrete

Cited by 11 publications

References 14 publications

Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method

Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method

Effect of accelerated aging by temperature and moisture variation cycles on the durability of concrete

Different Approaches to Develop More Sustainable Concrete Alternatives

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