Dr. Anatolijus Eisinas
'%3e%3cpath%20d='M22.1642%2019.0924C21.7317%2018.068%2021.1041%2017.1375%2020.3163%2016.3527C19.5309%2015.5656%2018.6006%2014.9381%2017.5766%2014.5048C17.5674%2014.5002%2017.5582%2014.4979%2017.5491%2014.4933C18.9774%2013.4616%2019.9059%2011.7811%2019.9059%209.88504C19.9059%206.74408%2017.3611%204.19922%2014.2201%204.19922C11.0792%204.19922%208.53429%206.74408%208.53429%209.88504C8.53429%2011.7811%209.46282%2013.4616%2010.8912%2014.4956C10.882%2014.5002%2010.8728%2014.5025%2010.8636%2014.5071C9.83652%2014.9404%208.91487%2015.5617%208.1239%2016.355C7.33685%2017.1404%206.70933%2018.0707%206.276%2019.0947C5.85031%2020.0972%205.62072%2021.172%205.59967%2022.2609C5.59905%2022.2853%205.60335%2022.3097%205.61229%2022.3325C5.62123%2022.3553%205.63465%2022.376%205.65174%2022.3935C5.66883%2022.4111%205.68926%2022.425%205.71182%2022.4345C5.73437%2022.444%205.7586%2022.4489%205.78308%2022.4489H7.15868C7.25956%2022.4489%207.3398%2022.3686%207.3421%2022.2701C7.38795%2020.5001%208.09868%2018.8425%209.35506%2017.5861C10.655%2016.2862%2012.3814%2015.5709%2014.2201%2015.5709C16.0588%2015.5709%2017.7852%2016.2862%2019.0852%2017.5861C20.3415%2018.8425%2021.0523%2020.5001%2021.0981%2022.2701C21.1004%2022.3709%2021.1807%2022.4489%2021.2815%2022.4489H22.6571C22.6816%2022.4489%2022.7058%2022.444%2022.7284%2022.4345C22.751%2022.425%2022.7714%2022.4111%2022.7885%2022.3935C22.8056%2022.376%2022.819%2022.3553%2022.8279%2022.3325C22.8369%2022.3097%2022.8412%2022.2853%2022.8406%2022.2609C22.8176%2021.165%2022.5907%2020.0989%2022.1642%2019.0924ZM14.2201%2013.8284C13.1678%2013.8284%2012.1773%2013.418%2011.4322%2012.6729C10.6871%2011.9278%2010.2767%2010.9374%2010.2767%209.88504C10.2767%208.83271%2010.6871%207.84227%2011.4322%207.09715C12.1773%206.35204%2013.1678%205.94165%2014.2201%205.94165C15.2724%205.94165%2016.2629%206.35204%2017.008%207.09715C17.7531%207.84227%2018.1635%208.83271%2018.1635%209.88504C18.1635%2010.9374%2017.7531%2011.9278%2017.008%2012.6729C16.2629%2013.418%2015.2724%2013.8284%2014.2201%2013.8284Z'%20fill='%238590A2'/%3e%3c/g%3e%3c/svg%3e)
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Academic Career Length
16Years (2011-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
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Journal Article
RŠRaimundas Šiaučiūnas
Raimundas ŠiaučiūnasGSG. Smalakys
G. SmalakysAnatolijus EisinasEPE. Prichockiene
E. PrichockieneThe main measure to reduce energy losses is the usage of insulating materials. When the temperature exceeds 500 °C, silicate and ceramic products are most commonly used. In this work, high-crystallinity 1.13 nm tobermorite and xonotlite were hydrothermally synthesized from lime and Ca–Si sedimentary rock, opoka. By XRD, DSC, TG and dilatometry methods, it has been shown that 1.13 nm tobermorite becomes the predominant compound in stirred suspensions at 200 °C after 4 h of synthesis in the mixture with a molar ratio CaO/SiO2 = 0.83. It is suitable for the production of insulating products with good physical–mechanical properties (average density < 200 kg·m−1, compressive strength ~0.9 MPa) but has a limited operating temperature (up to 700 °C). Sufficiently pure xonotlite should be used to obtain materials with a higher operating temperature. Even small amounts of semi-amorphous C–S–H(I) significantly increase its linear shrinkage during firing. It has also been observed that an increase in the strength values of the samples correlated well with the increase in the size of xonotlite crystallites. The optimal technological parameters are as follows: molar ratio of mixture CaO/SiO2 = 1.2; water/solid ratio W/S = 20.0; duration of hydrothermal synthesis at 220 °C—8 h, duration of autoclaving at 220 °C—4 h. The average density of the samples was ~180 kg·m−1, the operating temperature was at least 1000 °C, and the compressive strengths exceeded 1.5 MPa.
25 March 2011 in Materials and Structures
Journal Article
Kestutis BaltakysAnatolijus EisinasTDT. Dizhbite
T. DizhbiteLJL. Jasina
L. Jasina
RSR. Siauciunas
R. Siauciunas
SKS. Kitrys
S. Kitrys
1 January 2016 in Advances in Materials Science and Engineering
Journal Article
JDJolanta Doneliene
Jolanta Doneliene
Anatolijus EisinasKestutis BaltakysABAgne Bankauskaite
Agne Bankauskaite
The effect of synthetic CAH (130°C; 8 h; CaO/(SiO2+ Al2O3) = 0.55; Al2O3/(SiO2+ Al2O3) = 0.1, 0.15) with different crystallinity on the hydration kinetics of OPC at early stages of hydration was investigated. Also, the formation mechanism of compounds during OPC hydration was highlighted. It was determined that the synthetic CAH accelerated the initial reaction and shortened the induction period. Also, the second and third exothermic reactions begun earlier, and, during the latter reaction, the higher values of the heat flow were obtained in comparison with pure OPC samples. At later stages of hydration, synthetic CAH affect the OPC hydration as the usual pozzolanic additives; moreover, the larger values of cumulative heat were reached. It should be noted that the nature of synthetic CAH samples accelerated the dissolution of gypsum and stimulates the earliest C3S hydration.
Journal Article
DNDomante Niuniavaite
Domante NiuniavaiteKestutis Baltakys
Tadas DambrauskasAnatolijus EisinasDRDovile Rubinaite
Dovile RubinaiteAJAndrius Jaskunas
Andrius JaskunasIn this work, the thermal stability, microstructure, and catalytic activity in oxidation reactions of calcium silicate hydrates formed in the CaO-SiO2-Cr(NO3)3-H2O system under hydrothermal conditions were examined in detail. Dry primary mixture with a molar ratio of CaO/SiO2 = 1.5 was mixed with Cr(NO3)3 solution (c = 10 g Cr3+/dm3) to reach a solution/solid ratio of the suspension of 10.0:1. Hydrothermal synthesis was carried out in unstirred suspensions at 175 °C for 16 h. It was determined that, after treatment, semicrystalline calcium silicate hydrates C-S-H(I) and/or C-S-H(II) with incorporated Cr3+ ions (100 mg/g) were formed. The results of in situ X-ray diffraction and simultaneous thermal analyses showed that the products were stable until 500 °C, while, at higher temperatures, they recrystallized to calcium chromate (CaCrO4, 550 °C) and wollastonite (800–850 °C). It was determined that both the surface area and the shape of the dominant pore changed during calcination. Propanol oxidation experiments showed that synthetic semicrystalline calcium silicate hydrates with intercalated chromium ions are able to exchange oxygen during the heterogeneous oxidation process. The obtained results were confirmed by XRD, STA, FT-IR, TEM, SEM, and BET methods, and by propanol oxidation experiments.
6 April 2017 in Journal of Thermal Analysis and Calorimetry
Journal Article
Anatolijus EisinasJDJ. Doneliene
J. Doneliene
Kestutis BaltakysAUA. Urbutis
A. Urbutis
30 September 2022 in Journal of Thermal Analysis and Calorimetry
Journal Article
Anatolijus EisinasTDT. Dambrauskas
T. Dambrauskas
VEV. Eisinaite
V. Eisinaite
ASA. Sipailiene
A. Sipailiene
About Me
S1; GB] Dambrauskas, Tadas; Knabikaitė, Inga; Eisinas, Anatolijus; Baltakys, Kestutis; Paloub, Martin T. Influence of Cr3+, Co2+ and Cu2+ on the formation of calcium silicates hydrates under hydrothermal conditions at 200 °C // Journal of Asian Ceramic Societies. Abingdon : Taylor & Francis. ISSN 2187-0764. 2020, vol. 8, iss. 3, p. 753-763. DOI: 10.1080/21870764.2020.1789287. [Science Citation Index Expanded (Web of Science); Scopus] [IF: 3,125; AIF: 3,593; IF/AIF: 0,869; Q1 (2020, InCites JCR SCIE)]
2. [S1; CH] Niuniavaite, Domante; Baltakys, Kestutis; Dambrauskas, Tadas; Eisinas, Anatolijus; Rubinaite, Dovile; Jaskunas, Andrius. Microstructure, thermal stability, and catalytic activity of compounds formed in CaO-SiO2-Cr(NO3)3-H2O system // Nanomaterials. Basel : MDPI. ISSN 2079-4991. 2020, vol. 10, iss. 7, art. no. 1299, p. 1-16. DOI: 10.3390/nano10071299. [Science Citation Index Expanded (Web of Science); Scopus; Academic Search Complete] [IF: 5,076; AIF: 6,588; IF/AIF: 0,770; Q1 (2020, InCites JCR SCIE)]
3. [S1; GB] Eisinas, A.; Ruginyte, K.; Baltakys, K.; Demcak, S.; Dambrauskas, T.; Balintova, M.; Stevulova, N. Cu2+ ion adsorption by synthetic mayenite and its thermal stability // Ceramics international. Oxford : Elsevier. ISSN 0272-8842. eISSN 1873-3956. 2020, vol. 46, iss. 18, pt. B, p. 29429-29435. DOI: 10.1016/j.ceramint.2020.05.028. [Science Citation Index Expanded (Web of Science); Scopus] [IF: 4,527; AIF: 3,593; IF/AIF: 1,259; Q1 (2020, InCites JCR SCIE)]