The Effect of Cement Modification on the Rheological Properties of Cement Paste

Janavičius, Eugenijus; Daukšys, Mindaugas; Skripkiūnas, Gintautas; Nagrockienė, Džigita; Daugeliene, Ala

doi:10.3846/13923730.2013.851111

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…The reduction of concrete consistency (viscosity) with increasing of slag content in cement was observed in the latest investigations [22] and irregular shape of slag particles is the reason why this phenomenon occurs. The slump of two mixtures for testing in different durability testing conditions (concrete saturation in water, water solution with chemical composition characteristic of the Baltic Sea and sodium chloride solution) was 70 mm and was classified as slump class S2.…”

Section: Resultsmentioning

confidence: 99%

Influence of Mineral Additives on Environmental Resistance of Concrete

Lebedeva¹,

Skripkiūnas²,

Kičaitė³

2016

Construction Science

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-Hydraulic concrete is a composite material that consists of coarse and fine aggregates and a binder, which transforms from liquid to solid state while curing and is exposed to destructive impacts during exploitation. The research was carried out with various cements -Portland cement, slag Portland cement, slag cement and limestone. The results of research showed that quantity of slag in hardened Portland cement paste influences freezing-thawing of concrete for hydraulic structures. Hydraulic concrete under impact of the Baltic Sea is influenced by sea water and freezing and thawing cycles. Under the mentioned impacts exerted simultaneously, experiment results enable assessment of durability of hydraulic concrete. The objective of the work is to assess the impact of the environment of the Baltic Sea on changes in properties of hydraulic concrete after cyclic freezing and thawing.

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Section: Resultsmentioning

confidence: 99%

Influence of Mineral Additives on Environmental Resistance of Concrete

Lebedeva¹,

Skripkiūnas²,

Kičaitė³

2016

Construction Science

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“…Application of organomineral additives allowed substantial progress in cement technology [1][2][3][4]. These modifying agents consisting of highly active mineral additives (silica fume, fly ash, slags, metakaolin, etc.)…”

Section: Introductionmentioning

confidence: 99%

Combined Influence of Opoka and Slag on Cement Properties in Presence of Superplasticizer

Коровкин

Ерошкина

2017

SSP

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The influence of the milled opoka of Penza field and blast-furnace slag with the polycarboxylate superplasticizer present on the properties of mortar component of the concrete based on blended cement, including Portland cement, fly ash, blast-furnace slag, silica fume, and microquartz has been investigated. Some equations for the dependency of water requirement of the cement mortar component, as well as of its strength with various values of time on proportion of superplasticizer and components of blended binder have been developed. It has been shown that the introduction of opoka increases the water requirement of the mix, insignificantly decreasing the strength, when proportioned up to 15%. The detrimental effect of opoka on the strength considerably reduces with higher superplasticizer content and lower water-to-cement ratio.

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“…Cement paste is a concentrated suspension of small and heavy particles so rheological measurements are suffering to the disruption of cement operation (Janavičius et al 2013;Miranda et al 2010). The rheological properties of the cement paste gradually change with time (Macijauskas, Gailius 2014;Eisinas, Baltakys 2009).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Calcium Nitrate on the Plasticizing Effect of Cement Paste

Skripkiūnas

Kičaitė

Macijauskas

2016

Journal of Civil Engineering and Management

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The rheological properties of the cement pastes have been determined using a rotational viscometer under a special testing routine by increasing and retaining a steady rotation speed of the viscometer cylinder up to certain values and for a certain time. These tests, using rotational viscometer, have been conducted by making the assessment of cement paste flow curves, using Bingham rheological model. Rheological properties of cement pastes were tested at different times after pastes mixing: 0 min, 30 min, 60 min, 90 min, 120 min and 180 min. Cement pastes with same W/C ratio equal to 0.35 were tested. The content of admixture was used 0%, 0.5%, 1%, 2%, 3% and 5%. The admixture of Ca(NO3)2 can be used in cement pastes and concretes without a reduction in consistency during 120 min in the dosage of up to 2%. Dosages of Ca(NO3)2 from 3% are not recommended for cement pastes and concrete, they significantly increase the viscosity of mixtures immediately after mixing The admixture of calcium nitrate changes thixotropy of cement pastes. In this case, a bigger dosage of calcium nitrate increases the thixotropy of pastes.

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The Effect of Cement Modification on the Rheological Properties of Cement Paste

Cited by 4 publications

References 18 publications

Influence of Mineral Additives on Environmental Resistance of Concrete

Influence of Mineral Additives on Environmental Resistance of Concrete

Combined Influence of Opoka and Slag on Cement Properties in Presence of Superplasticizer

The Influence of Calcium Nitrate on the Plasticizing Effect of Cement Paste

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