English
Русский 83-94 p.
Сement hydration accelerator (highly dispersed calcium hydrosilicates) and hydration retarder (sucrose) are components of calcium silicate dispersion (CSD). Their joint influence on the processes of setting and hardening of cement composites is considered. The content of 10% CSD in the composition of the composite binder (CB) leads to a shift of the thermal maximum on the thermokinetic curve by a day. At the same time, at the late stages of hydration (>70 hours), the heat release rate remains consistently high, it is 2-3 times higher than the heat release rate of the control sample. The setting kinetics of CB pastes depends on the content of CSD in its composition and is of an extreme nature. The effectiveness of CSD in the composition of CB was evaluated on the example of ordinary heavy concrete (B25) with the replacement of cement with CSD. The results of assessing the change in the strength of concrete at CB are supplemented with calculated strength indicators in the future up to 1800 days hardening. The expected compressive strength of concrete samples on a composite binder is 1.8 times higher than the strength of the control sample.
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2. Benjamin J.S., Rawala A., Gary P.F., Law-rence R.R., Vijay G., Jacob N.I., Bradley F.C. Origins of saccha-ride-dependent hydration at aluminate, silicate, and aluminosilicate surfaces. PNAS. 2011. Vol. 108. № 22. P. 8949 – 8954.
3. Khan B., Ullah M. Effect of a retarding admixture on the setting time of cement pastes in hot weather. Eng. Sci. 2004. Vol. 15. P. 63 – 79.
4. Oyekan G.L., Oyelade O.A., Crushed waste glass as a partial replacement of cement in normal concrete pro-duction with sugar added as an admixture. J. Eng. Appl. Sci. 2011. Vol. 6. P. 369 – 372.
5. Giridhar V., Gnaneswar K., Kishore Kumar Reddy P. Effect of sugar and jaggery on strength properties of concret./ Int. J. Eng. Sci. 2013. Vol. 2. P. 1 – 6.
6. Usman N.D., Chom H.A., Salisu C., Abubakar H.O., Gyang J.B. The impact of sugar on setting-time of ordi-nary Portland ce-ment (OPC) paste and compressive strength of concrete. FUTY J. Environ. 2016. Vol. 10. P. 107 – 114.
7. Devakate A.B. Acharya V.T., Keerthi Gowda B.S. Effect of sugar on setting-time and compressive strength of ordinary Portland cement paste. Int. J. Adv. Struct. Geotech. Eng. 2017. Vol. 04. P. 2319 – 5347.
8. Tarakanov, O.V. Cementnye materialy s dobavkami uglevodov. Penza: PGASA. 2003. 166 s.
9. Ramachandran V.S. Fel'dman R.F., Kollepardi M. Dobavki v beton: Spravochnoe posobie. M.: Strojizdat. 1988. 575 s.
10. Zhang L. Catalan L.J., Balec R.J., Larsen A.C., Esmaeili H.H., Kinrade S.D. Effects of saccharide set re-tarders on the hydration of ordinary Portland cement and pure tricalcium silicate. J. Am. Ceram. Soc. 2010. Vol. 93 (1). P. 279 – 287.
11. Abalaka A.E. Effects of sugar on physical properties of ordinary Portland cement paste and concrete, AUJT. 2011. No. 14. P. 225 – 228.
12. Zhang H. Wang W., Li Q., Tian Q., Li L., Liu J. A starch-based admixture for reduction of hydration heat in cement composites. Construction and Building Materials. 2018. Vol. 173. P. 317 – 322.
13. Shamsad A. Adamu L., Al–Osta M. Effect of sugar dosage on setting time, microstructure and strength of Type I and Type V Portland cements. Case Studies in Construction Materials. 2020. Vol. 13. e00364.
14. Garci Juenger M.C. Jennings H.M. New insights into the effects of sugar on the hydration and micro-structure of cement pastes. Cement and Concrete Research. 2002. Vol. 32. Iss. 3. P. 393 – 399.
15. Akat’eva L.V., Ivanov V.K., Gladun V.D., Khol’kin A.I. Preparation of nanosized powders of calcium hy-drosilicates for the use in composite materials. Theoretical Foundation of chemical engineering. 2014. Vol. 48. Is-sue 4. P. 468 – 476.
16. Nicoleau L. Accelerated growth of calcium silicate hydrates: experiments and simulations. Cem. Concr. Res. 2011. Vol. 41. P. 1339 – 1348.
17. Land G., Stephan D. The Synthesis of C–S–H Seeds Methods, Variables and their Impact on the Ability to Accelerate Cement Hydration. 14th International Conference on the chemistry of cement (14th ICCC). 2015. P. 1 – 11.
18. John E., Matschei T., Stephan D. Nucleation seeding with calcium silicate hydrate – A review. Cement and Concrete Research. 2018. Vol. 113. P. 74 – 85.
19. Dorn T. Blask O., Stephan D. Acceleration of cement hydration – A review of the working mecha-nisms, ef-fects on setting time, and compressive strength development of accelerating admixtures. Construc-tion and Building Materials. 2022. Vol. 323. P. 126554.
20. Shoshin E. A. Silikatnyj napolnitel', poluchaemyj metodom termoliza modificirovannyh gidrosilikatov ce-menta. Stroitel'nye materialy. 2017. № 7. S. 16 – 19.
21. Shoshin E.A., Strokova V.V., Kozlov N.A., Gribkov D.S. Povyshenie jeffektivnosti cementnyh betonov za schet primenenija kompozicionnogo vjazhushhego s silikat-kal'cievoj dispersiej. ALITinform: Cement. Beton. Su-hie Smesi. 2019. № 4 (57). S. 22 – 29.
22. Shoshin E.A., Strokova V.V. Vlijanie prirody modificirujushhego uglevoda na svojstva silikatnyh dobavok dlja cementnyh system. Stroitel'nye materialy. 2019. № 5. S. 55 – 62.
23. Denisenko V. V., Ljashenko P.A. Analiz metodov opredelenija predelov plastichnosti gruntov.Naunchye trudy KubGTU. 2015. № 10. S. 1 – 17. URL: http://ntk.kubstu.ru/file/606 (data obrashhenija 18.02.2022)
24. Rahimbaev Sh.M., Minakov S.V. Kinetika teplovydelenija cementnogo testa s tonkomolotymi mineral'nymi dobavkami. Vestnik Belgorodskogo gosudarstvennogo tehnologicheskogo universiteta im. V.G. Shuhova. 2010. № 2. S. 39 – 42.
25. Shoshin E.A., Strokova V.V. Vodoreducirujushhij i plastificirujushhij jeffekty primenenija dobavki sin-teticheskih silikatov kal'cija v cementnyh kompozicijah. ALITinform: Cement. Beton. Suhie Smesi. 2019. № 1 (54). S. 18 – 27.
26. Rahimbaev Sh.M., Avershina N.M. Prognozirovanie dolgovechnosti stroitel'nyh materialov po edinichnomu sroku ispytanija. Stroitel'nye materialy. 1994. №4. S. 17 – 18.
27. Babar A., Liaqat A.Q. Durability of recycled aggregate concrete modified with sugarcane molasses. Con-struction and Building Materials. 2019. Vol. 229. P. 116913.
28. Jumadurdiyev A. Ozkul M.H., Saglam A.R., Parlak N. The utilization of beet molasses as a retarding and water-reducing admixture for concrete. Cem. Concr. Res. 2005. Vol. 35 (5). P. 874 – 882.
29. Kireev Ju.L., Nesterova L.L., Luchinina I.G. O vzaimodejstvii mineralov portlandcementnogo klinkera s rastvorom sahara. Cement. 1999. № 4. S. 19 – 21.
30. Akar C., Canbaz M. Effect of molasses as an admixture on concrete durability. J. Clean. Prod. 2016. Vol. 112. P. 2374 – 2380.
31. Rashid K., Tariq S., Shaukat W.Attribution of molasses dosage on fresh and hardened performance of recy-cled aggregate concrete. Constr. Build. Mater. 2019. Vol. 197. P. 497 – 505.