CONCRETE BASED ON MODIFIED DISPERSE CEMENT SYSTEM

D. V. Rudenko

Abstract


Purpose. The article considers definition of the bond types occurring in a modified cement concrete matrix, and the evaluation of the quality of these links in a non-uniform material to determine the geometrical and physical relationships between the structure and the cement matrix modifiers. Methodology. To achieve this purpose the studies covered the microstructure of dispersed modified concrete cement matrix, the structure formation mechanism of the modified cement concrete system of natural hardening; as well as identification of the methods of sound concrete strength assessment. Findings. The author proposed a model of the spatial structure of the concrete cement matrix, modified by particulate reinforcement crystal hydrates. The initial object of study is a set of volume elements (cells) of the cement matrix and the system of the spatial distribution of reinforcing crystallohydrates in these volume elements. It is found that the most dangerous defects such as cracks in the concrete volume during hardening are formed as a result of internal stresses, mainly in the zone of cement matrix-filler contact or in the area bordering with the largest pores of the concrete. Originality. The result of the study is the defined mechanism of the process of formation of the initial strength and stiffness of the modified cement matrix due to the rapid growth of crystallohydrates in the space among the dispersed reinforcing modifier particles. Since the lack of space prevents from the free growth of crystals, the latter cross-penetrate, forming a dense structure, which contributes to the growth of strength. Practical value. Dispersed modifying cement matrix provides a durable concrete for special purposes with the design performance characteristics. The developed technology of dispersed cement system modification, the defined features of its structure formation mechanism and the use of congruence principle for the complex of technological impacts of physical and chemical processes of hydration of clinker minerals allowed developing technological bases for special-purpose concrete.


Keywords


cement matrix; disperse modification; structure formation; concrete

References


Deynega Yu.F. Dispersnyye sistemy v elektricheskikh polyakh [Disperse systems in electric fields]. Ukrainskiy khimicheskiy zhurnal – Ukrainian Chemical Journal, 2001, vol. 67, no. 3, pp. 13-18.

Ivanova A.P., Trufanova O.I. Analiz i perspektivy primeneniya effektivnykh resursosberegayushchikh tekhnologiy v proizvodstve betona [Analysis and application prospects of effective resources-saving technologies in concrete manufacture]. Nauka ta progres transport – Science and Transport Progress, 2014, no. 5 (53), pp. 150–156. doi: 10.15802/stp2014/30453.

Babkov V.V., Sakhibgareyev P.P., Chuykin A.Ye., Anvarov R.A., Komokhov P.G. Osobennosti strukturoobrazovaniya vysokoprochnogo tsementnogo kamnya v usloviyakh dlitelnogo tverdeniya [Features of structure formation of high-strength cement stone in long-term hardening]. Stroitelnyye materialy – Construction Materials, 2003, no. 10, pp. 42-43.

Piradov K.A., Guzeyev Ye.A. Mekhanika razrusheniya zhelezobetona [Fracture mechanics of concrete]. Moscow, Novyy vek Publ., 1998. 190 p.

Rabinovich F.N. Kompozity na osnove dispersnoarmirovannykh betonov. Voprosy teorii i proyektirovaniya, tekhnologiya, konstruktsii [Composites based on fiber reinforced concrete. Questions of the theory and design, technology, construction]. Moscow, ASV Publ., 2004. 560 p.

Rudenko D.V. Fizyko-khimichna modyfikatsiia tsementnoi systemy monolitnoho betonu [Physico-chemical modification of monolithic concrete cement system]. Nauka ta prohres transportu – Science and Transport Progress, 2015, no.6 (60), pp. 174-182. doi: 10.15802/stp2015/57103.

Kherdtl R., Ditermann M., Shmidt K. Dolgovechnost betonov na osnove mnogokomponentnykh tsementov [Durability of concrete on the basis of multicomponent cements]. Tsement i yego primeneniye – Cement and its Application, 2011, no. 1, pp. 76-80.

Khoroshun L.P., Maslov B.P. Nelineynyye svoystva kompozitnykh materialov stokhasticheskoy struktury [Non-linear properties of composite materials of stochastic structure]. Kiev, Naukova dumka Publ., 1992. 132 p.

Collepardi M. Innovative Concretes for Civil Engineering Structures: SCC, HPC and RPC. Workshop on New Technologies and Materials in Civil Engineering: Proc. Milan, 2003, pp. 1-8.

Lee C.Y., Lee H.K., Lee K.M. Strength and microstructural characteristics of chemically activated fly ash-cement systems. Cement and Concrete Research, 2003, vol. 33, no. 3, pp. 425-431. doi: 10.1016/S0008-8846(02)00973-0.

Mehta P.K. High-Performance, High-Volume Fly Ash Concrete for Sustainable Development. The Intern. Workshop on Sustainable Development and Concrete Technology: Proc. (20.05–21.05.2004). Beijing, 2004, pp. 3-13.

Middendorf B., Singh N.B. Nanoscience and nanotechnology in cementitious materials. Cement International, 2006, no. 4, pp. 80-86.

Rudenko D. Properties of the phase components of the modified cement system. TEKA Komisji Motoryzacji i Energetyki Rolnictwa, 2013, vol. 13, no. 4, pp. 218-224.

Rudenko N. The Development of Conception of New Generation Concretes. TEKA Komisji Motoryzacji i Energetyki Rolnictwa, 2010, vol. 10B, pp. 128-133.

Rudenko N. Technology of shotcreting based on activated binder. TEKA Komisji Motoryzacji i Energetyki Rolnictwa, 2014, vol. 14, no 1, pp. 222-228.


GOST Style Citations


  1. Дейнега, Ю. Ф. Дисперсные системы в электрических полях / Ю. Ф. Дейнега // Укр. хим. журн. – 2001. – Т. 67, № 3. – С. 13–18.
  2. Иванова, А. П. Анализ и перспективы применения эффективных ресурсосберегающих технологий в производстве бетона / А. П. Иванова, О. И. Труфанова // Наука та прогрес транспорту. – 2014. – № 5 (53). – С. 150–156. doi: 10.15802/stp2014/30453.
  3. Особенности структурообразования высокопрочного цементного камня в условиях длительного твердения / В. В. Бабков, P. P. Сахибгареев, А. Е. Чуйкин [и др.] // Строит. материалы. – 2003. – № 10. – С. 42–43.
  4. Пирадов, К. А. Механика разрушения железобетона / К. А. Пирадов, Е. А. Гузеев. – Москва : Новый век, 1998. – 190 с.
  5. Рабинович, Ф. Н. Композиты на основе дисперсноармированных бетонов. Вопросы теории и проектирования, технология, конструкции / Ф. Н. Рабинович. – Москва : АСВ, 2004. – 560 с.
  6. Руденко, Д. В. Фізико-хімічна модифікація цементної системи монолітного бетону // Наука та прогрес транспорту. – 2015. – № 6 (60). – С. 174–182. doi: 10.15802/stp2015/57103.
  7. Хердтл, Р. Долговечность бетонов на основе многокомпонентных цементов / Р. Хердтл, М. Дитерманн, К. Шмидт // Цемент и его применение. – 2011. – № 1. – С. 76–80.
  8. Хорошун, Л. П. Нелинейные свойства композитных материалов стохастической структуры / Л. П. Хорошун, Б. П. Маслов. – Киев : Наук. думка, 1992. – 132 с.
  9. Collepardi, M. Innovative Concretes for Civil Engineering Structures: SCC, HPC and RPC / M. Collepardi // Workshop on New Technologies and Materials in Civil Engineering : Proceedings. – Milan, 2003. – P. 1–8.
  10. Lee, C. Y. Strength and microstructural characteristics of chemically activated fly ash-cement systems / C. Y. Lee, H. K. Lee, K. M. Lee // Cement and Concrete Research. – 2003. – Vol. 33, № 3. – P. 425–431. doi: 10.1016/S0008-8846(02)-00973-0.
  11. Mehta, P. K. High-Performance, High-Volume Fly Ash Concrete for Sustainable Development / P. K. Mehta // The Intern. Workshop on Sustainable Development and Concrete Technology : Proc. (20.05–21.05.2004). – Beijing, 2004. – P. 3–13.
  12. Middendorf, B. Nanoscience and nanotechnology in cementitious materials / B. Middendorf, N. B. Singh // Cement Intern. – 2006. – № 4. – P. 80–86.
  13. Rudenko, D. Properties of the phase components of the modified cement system / D. Rudenko // TEKA Komisji Motoryzacji i Energetyki Rolnictwa. – 2013. – Vol. 13, № 4. – P. 218–224.
  14. Rudenko, N. The Development of Conception of New Generation Concretes / N. Rudenko // TEKA Komisji Motoryzacji i Energetyki Rolnictwa. – 2010. – Vol. 10B. – P. 128–133.
  15. Rudenko, N. Technology of shotcreting based on activated binder / N. Rudenko // TEKA Komisji Motoryzacji i Energetyki Rolnictwa. – 2014. – Vol. 14, № 1. – P. 222–228.


DOI: https://doi.org/10.15802/stp2016/78008

 

Cited-by:

1. RESEARCH OF THE STRESS STATE OF A MODIFIED IN-SITU CONCRETE
D. V. Rudenko
Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport  Issue: 6(66)  First page: 166  Year: 2016  
doi: 10.15802/stp2016/90515



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