Complex multifunctional additive for anchoring grout based on alkali-activated portland cement

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dc.contributor.authorKrivenko, P. V.
dc.contributor.authorPetropavlovskyi, O. M.
dc.contributor.authorRudenko, I. I.
dc.contributor.authorKonstantynovskyi, O. P.
dc.contributor.authorKovalchuk, A. V.
dc.date.accessioned2020-11-18T08:35:12Z
dc.date.available2020-11-18T08:35:12Z
dc.date.issued2020
dc.descriptiondoi:10.1088/1757-899X/907/1/012055uk_UA
dc.description.abstractComplex multifunctional additive (further, CA) which consists of aluminum powder, surfactant, salt-electrolyte (NaNO3) and calcium sulfate hemihydrate (CaSO4∙0.5H2O) is proposed for ensuring necessary properties of anchoring grouts based on alkali-activated portland cement (further, AAPC) presented by the system «ordinary portland cement clinker - sodium metasilicate». Specified consistency of fresh AAPC mortar along with it strength after hardening are provided by water reducing due to application of modified polyethylene glycol characterized by stability of molecular structure in AAPC hydration medium. CA influence on shrinkage mitigation in AAPC mortar is explained both water-reducing effect and gas release with volume increasing during formation of dispersive-coagulation structure. Expansion of crystallization-condensation structure is ensured due to stress of calcium hydrosulfoaluminate 3CaO∙Al2O3∙3СаSО4∙32H2O and calcium hydronitroaluminate ЗСаО∙А12О3∙Са(NO3)2∙10Н2О which form due to presence of СаSО4∙0,5H2O and NaNO3 in CA. Time matching of gas release with structure formation insures dense microstructure due to filling of pores by hydrated phases that causes lower excess stress during crystallization. CA ensures necessary performances of AAPC anchoring grout: consistency 190 mm; workability retention time 15 min; tensile strength in bending / compressive strength 6.1 / 25.7 MPа and 12.9 / 68.5 MPa in 1 d and 28 d agreeably; adhesion 0.9 MPa; linear extension up to +0.37 mm/m.uk_UA
dc.description.sponsorshipAuthors would like to acknowledge the contribution of the COST Action CA15202 «Self-Healing concrete: the path to sustainable construction» of the European Union’s framework program HORIZON2020, 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 is carried out within the budgetary financing of topic with registration No 1020U001010 and implementation period 2020 - 2022.uk_UA
dc.identifier.citationComplex multifunctional additive for anchoring grout based on alkali-activated portland cement / P. V. Krivenko, O. M. Petropavlovskyi, I. I. Rudenko [ atc ] // IOP Conference Series : Materials Science and Engineering. - Vol. 907. - P. 1 - 9. – Bibliogr. : 45 titl.uk_UA
dc.identifier.issn1757-899X
dc.identifier.urihttps://repositary.knuba.edu.ua/handle/987654321/6420
dc.language.isoenuk_UA
dc.publisherIOP Publishinguk_UA
dc.subjectanchoring groutuk_UA
dc.subjectalkali-activated portland cementuk_UA
dc.subjectcomplex multifunctional additiveuk_UA
dc.subjectaluminum powderuk_UA
dc.subjectsurfactantuk_UA
dc.subjectsalt-electrolyteuk_UA
dc.subjectcalcium sulfate hemihydrateuk_UA
dc.subjectкафедра технології будівельних конструкцій і виробівuk_UA
dc.subject.udc666.942uk_UA
dc.titleComplex multifunctional additive for anchoring grout based on alkali-activated portland cementuk_UA
dc.typeArticleuk_UA

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