35. The influence of complex additive on strength and proper deformations of alkali-activated slag cements

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dc.contributor.authorKrivenko, Pavel
dc.contributor.authorPetropavlovskyi, Oleh
dc.contributor.authorRudenko, Igor
dc.contributor.authorKonstantynovskyi, Oleksandr
dc.date.accessioned2020-09-16T10:53:39Z
dc.date.available2020-09-16T10:53:39Z
dc.date.issued2019
dc.descriptionhttps://www.scientific.net/MSF.968.13uk_UA
dc.description.abstractThe peculiarity of alkali-activated slag cements (further, AASC’s) is increased proper deformations, which can cause increased cracking and reduced durability of structure. The paper is devoted to manage AASC’s proper deformations. The main task was to determine the composition of complex additives (further, CA’s) in system «ordinary portland cement (further, OPC) clinker -mineral compound of different anionic type - surfactant» in presence of sodium metasilicate (further, MS) to affect on hydrated AASC performance while ensuring effective structure of artificial stone by criterion of shrinkage deformations. Comparative analysis of hydrated cement systems "OPC clinker - MS", "OPC clinker - mineral compound - MS" and "OPC clinker - mineral compound - MS - surfactant" showed that the greatest effect on reduction of proper deformations occurs when the mineral compounds relate to electrolytes, i.e. Na2SO4 and NaNO3. Hydrated system is characterized by expansion (+0,062 mm/m) in presence of Na2SO4. Almost no shrinkage is supplied by application of NaNO3 (-0,062 mm/m). The obtained CA’s were tested in AASC. CA in the system “OPC clinker - NaNO3 - surfactant” provides the initial setting 43 min, the end - 65 min with accelerated strength. Investigated AASC can be classified as non-shrinking cement. This phenomena is ensured by increasing density, homogeneity and monolithicity of hydrosilicate formations, as well as due to formation of hydroaluminosilicate structures with different morphology by inclusion of nitrate anions.uk_UA
dc.description.sponsorshipThe authors would like to acknowledge the contribution of the COST Action CA15202 SARCOS “Self-healing As preventive Repair of COncrete Structures” http://www.cost.eu/COST_Actions/ca/CA15202. The authors also express their gratitude to the Ministry of Education and Science of Ukraine for financial support of this research that was carried out within the budgetary financing of topics with registration No 0118U002017.uk_UA
dc.identifier.citation35. The influence of complex additive on strength and proper deformations of alkali-activated slag cements / P. Krivenko, O. Petropavlovskyi, I. Rudenko, O. Konstantynovskyi // Materials Science Forumю. - 2019. - Vol. 968. - P. 13 - 19.uk_UA
dc.identifier.issn1662-9752
dc.identifier.urihttps://repositary.knuba.edu.ua/handle/987654321/5607
dc.language.isoenuk_UA
dc.publisherTrans Tech Publications Ltduk_UA
dc.subjectalkali-activated slag cementuk_UA
dc.subjectsurfactantuk_UA
dc.subjectelectrolyteuk_UA
dc.subjectsetting timeuk_UA
dc.subjectstrengthuk_UA
dc.subjectstrengthuk_UA
dc.subjectshrinkage deformationuk_UA
dc.subjectstructure formationuk_UA
dc.subjectкафедра технології будівельних конструкцій і виробівuk_UA
dc.subject.udc666.9.015.66uk_UA
dc.title35. The influence of complex additive on strength and proper deformations of alkali-activated slag cementsuk_UA
dc.typeArticleuk_UA

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