Properties of blastfurnace cements (CEM III/A, B, C) based on Portland cement clinker, blastfurnace slag and cement kiln dusts

Osmanović, Zehrudin; Haračić, Nedžad; Zelić, Jelica

doi:10.1016/j.cemconcomp.2018.05.006

Cited by 22 publications

(7 citation statements)

References 7 publications

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“…its high amount of blast furnace slag (>66%) which give reducing conditions in the por solution [31]. This interstitial solution is strongly alkaline of order > 13, which is favorab for maintaining Ca(OH)2 precipitation despite a lower hydroxyl (OH − ) concentration [30 GGBS hydrates more slowly than Portland clinker and the increase in compressiv strength occurs later in the curing process [32]. In the very long term, the strength of CEM III can reach up to 180% of the 28-day strength under normal conditions.…”

Section: Mechanical Properties Resultsmentioning

confidence: 99%

On the Properties Evolution of Eco-Material Dedicated to Manufacturing Artificial Reef via 3D Printing: Long-Term Interactions of Cementitious Materials in the Marine Environment

et al. 2022

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This paper deals with the evolution monitoring of biomass colonization and mechanical properties of 3D printed eco-materials/mortars immersed in the sea. Measurements of tensile strength, compressive strength, and Young’s modulus were determined on samples deployed along the Atlantic coast of Europe, in France, United Kingdom, Spain, and Portugal. The samples were manufactured using 3D printing, where six mix designs with a low environmental impact binder were used. These mortars were based on geopolymer and cementitious binders (Cement CEM III), in which sand is replaced by three types of recycled sand, including glass, seashell, and limestone by 30%, 50%, and 100% respectively. The colonization of concrete samples by micro/macro-organisms and their durability were also evaluated after 1, 3, 6, 12, and 24 months of immersion. The results showed that both biomass colonization and mechanical properties were better with CEM III compared to geopolymer-based compositions. Therefore, the mixed design optimized according to mechanical properties show that the use of CEM III should be preferred over these geopolymer binders in 3D printed concrete for artificial reef applications.

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Section: Mechanical Properties Resultsmentioning

confidence: 99%

On the Properties Evolution of Eco-Material Dedicated to Manufacturing Artificial Reef via 3D Printing: Long-Term Interactions of Cementitious Materials in the Marine Environment

et al. 2022

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“…Keywords: alkalis, cement, hydration, cement kiln by-pass dust E. Tkaczewska, G. Łój, A. Frątczak, Cement Wapno Beton, 26(1) (2021), [24][25][26][27][28][29][30][31][32][33][34] doi: https://doi.org/10.32047/CWB.2021. 26.1.3 Pyły z bocznikowania gazów [PBG] z pieca cementowego mają dużą zmienność właściwości, np.…”

Section: Discussionunclassified

“…With the time of hydration, the increase in compressive strength of cement mortars CEM I and CEM III containing cement by-pass dust is greater than that without cement by-pass dust, which may be attributed to a higher content of available free lime and sulphates in investigated by-pass dust ,contributing toward higher strength of cements by forming the calcium hydroxide and ettringite. The greater development of compressive strength of hardened slag cement mortar CEM III in the presence of cement kiln by-pass dust results from the increase of the amount of hydration products, such as C-S-H phase, and their accumulation within the available spaces, between unreacted cement grains (7,25,30). In addition, the increased values of compressive strength of slag cement mortar with the addition of by-pass dust is due to the potential activation of blast furnace slag fraction in slag cements, with the alkalis present in the dust, and more intensive precipitation of hydration products of blast furnace slag (24,31).…”

Section: Compressive Strengthmentioning

confidence: 99%

The influence of cement kiln by-pass dust addition on the properties of Portland and slag cement

Tkaczewska¹

2021

Cem. Wapno Beton

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In this paper, the infl uence of cement kiln by-pass dust on the properties of Portland cement and slag cement was studied. The reference cements used in the experiment were CEM I 42.5R and CEM III/A 42.5N. The cement kiln by-pass dust replacement of cement was 0.7% and 1.7%, to satisfy the Cl- ions content in cements: lower than or equal to 0.1%, following the demand of PN-EN 197-1:2012 standard. The following properties of cements were examined: the heat of hydration, water demand for normal consistency, initial setting time and compressive strength. The results showed that the addition of cement kiln by-pass dust of up to 1.7% has no negative effect on the properties of Portland cement and slag cement. The cements represent the same strength class, as without dust addition.

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“…(1) it is known that the pH (OH − concentration) in CEM-I concretes is higher than in those incorporating silica-based additions [63,64] as is the case of CEM-I-sf and CEM-III;…”

Section: Analysis Of Tafel Linesmentioning

confidence: 99%

Improved Tafel-Based Potentiostatic Approach for Corrosion Rate Monitoring of Reinforcing Steel

et al. 2022

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Potential step voltammetry (PSV) was introduced in earlier works as an advantageous alternative to traditional methods for measuring corrosion rate in reinforced concrete. The present study aims to improve PSV to maximize its applicability in corrosion rate monitoring, that is, beyond the narrowly-defined steel–concrete systems in which was initially validated. It was therefore identified necessary to address the most suitable PSV pulse amplitudes to accurately obtain the Tafel lines and, therefore, corrosion rate in steel-mortar systems with well-differentiated ohmic drop. PSV findings were compared to reference methods, i.e. Tafel intersection and linear polarization resistance. As a novelty, we propose a procedure to improve the reliability of the PSV-determined Tafel lines, which is based on three protocols (P1, P2 and P3). P1 consists of a specific pulse sequence to accurately characterize the morphology of the polarization curve without disturbing the system. P2 consists of two short pulses for determining the ohmic drop compensation factor. Finally, P3 consists of a simple calculation procedure to accurately adjust the PSV pulse amplitudes (∆V) to the steel–concrete system assessed, thus obviating the need for preset values and, therefore, ensuring accurate corrosion rate results. The procedure proposed is intended to improve PSV with a view to its consolidation as a reliable tool for the unsupervised monitoring of real structures.

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Properties of blastfurnace cements (CEM III/A, B, C) based on Portland cement clinker, blastfurnace slag and cement kiln dusts

Cited by 22 publications

References 7 publications

On the Properties Evolution of Eco-Material Dedicated to Manufacturing Artificial Reef via 3D Printing: Long-Term Interactions of Cementitious Materials in the Marine Environment

On the Properties Evolution of Eco-Material Dedicated to Manufacturing Artificial Reef via 3D Printing: Long-Term Interactions of Cementitious Materials in the Marine Environment

The influence of cement kiln by-pass dust addition on the properties of Portland and slag cement

Improved Tafel-Based Potentiostatic Approach for Corrosion Rate Monitoring of Reinforcing Steel

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