Enhancement of alkali-activated slag cement concretes crack resistance for mitigation of steel reinforcement corrosion

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dc.contributor.authorKrivenko, Pavlo
dc.contributor.authorPetropavlovskyi, Oleh
dc.contributor.authorKovalchuk, Oleksandr
dc.contributor.authorRudenko, Igor
dc.contributor.authorKonstantynovskyi, Oleksandr
dc.date.accessioned2020-09-28T11:17:56Z
dc.date.available2020-09-28T11:17:56Z
dc.date.issued2020-04
dc.descriptionhttps://doi.org/10.1051/e3sconf/202016606001uk_UA
dc.description.abstractThe paper is devoted to mitigation of steel reinforcement corrosion in alkali-activated slag cement (further, AASC) concretes, based on soluble sodium silicates (further, SSS’s), obtained from high consistensy concrete mixes. Enhancement of AASC fine concretes crack resistance due to modification by complex shrinkage-reducing additives (further, SRA’s) based on surfactants and trisodium phosphate Na3PO4.12H2O (further, TSP) was proposed for mitigation of steel reinforcement corrosion. SSS’s were presented by sodium metasilicate (silica modulus 1.0, dry state) and water glass (silica modulus 2.9, density 1400 kg/m3). In case of sodium metasilicate the application of SRA composition “ordinary portland cement clinker – TSP – sodium lignosulphonate – sodium gluconate” provides enhancement of crack resistance starting from early age structure formation with restriction of drying shrinkage from 0,984 to 0,713 mm/m after 80 d. The effect is caused by reduction of water and by higher volume of crystalline hydrates. In turn, SRA presented by compositions “TSP – glycerol” and “TSP – glycerol – polyacrylamide” provide enhancement of AASC fine concretes fracture toughness during late structure formation with increasing ratio of tensile strength in bending to compressive strength up to 37 – 49 % if compare with the reference AASC when water glass is used.uk_UA
dc.description.sponsorshipAuthors express their gratitude to the Ministry of Education and Science of Ukraine for financial support of the research, that was performed in the framework of budget funding, as well as for the development of the theme of research according to the program of scientific cooperation COST Action CA15202 “Self-Healing concrete: the path to sustainable construction” of the European Union’s framework program HORIZON 2020.uk_UA
dc.identifier.citationEnhancement of alkali-activated slag cement concretes crack resistance for mitigation of steel reinforcement corrosion / P. Krivenko, O. Petropavlovskyi, O. Kovalchuk, I. Rudenko. O. Konstantynovskyi // E3S Web of Conferences;166 (2020), 06001. - P. 1-8. - Bibliogr. : 51 titl.uk_UA
dc.identifier.issn2267-1242
dc.identifier.urihttps://repositary.knuba.edu.ua/handle/987654321/5772
dc.language.isoen_USuk_UA
dc.publisherEDP Sciencesuk_UA
dc.subjectalkali-activated slag cementuk_UA
dc.subjectfine concreteuk_UA
dc.subjectsalt-electrolyteuk_UA
dc.subjectsurfactantuk_UA
dc.subjectcomplex additiveuk_UA
dc.subjectsteel reinforcement corrosionuk_UA
dc.subjectshrinkageuk_UA
dc.subjectstrengthuk_UA
dc.subjectкафедра технології будівельних конструкцій і виробівuk_UA
dc.subject.udc624.078.7.014.2uk_UA
dc.titleEnhancement of alkali-activated slag cement concretes crack resistance for mitigation of steel reinforcement corrosionuk_UA
dc.typeArticleuk_UA

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