English
Русский 38-43 p.
The efficiency of traditional raw materials using as well as expanding of potential uses for non-conventional and alternative raw materials with different origin is the tasks exiting interest among material scientists and manufacture stuff. Investigation of the above is oriented on solution of such scientific problem as more deep understanding of structure and features of material. The results obtained also allow solution of some technological, technical and economical tasks.
Greatly, it is actual when using of new types of raw materials as well as when synthesis of new composites. Concerning the construction material science field, the classic problem is the looking for ways to study the reactivity of raw components under different conditions, its control and, generally, its increasing to produce higher performance materials.
Among the popular and widely-used construction materials are alkali-activated binders and relevant composites.
In this study the results of granulometric analysis of suspension based on alkali-activated aluminosilicate with different crystallinity degree are presented. It was found, when treatment of aluminosilicate grain by alkali activator leads to the grain solubilizing (but differently depending on crystallinity degree of aluminosilicate) and formation of alkali-aluminosilicate gel that reacts with unreacted part of the grain according to structure affinity principle. It was also determined the crystallinity degree of aluminosilicate component is inversely proportional to its solubility in highly-alkali environment. The model of structure formation for geopolymer system under alkali effect is offered.
Greatly, it is actual when using of new types of raw materials as well as when synthesis of new composites. Concerning the construction material science field, the classic problem is the looking for ways to study the reactivity of raw components under different conditions, its control and, generally, its increasing to produce higher performance materials.
Among the popular and widely-used construction materials are alkali-activated binders and relevant composites.
In this study the results of granulometric analysis of suspension based on alkali-activated aluminosilicate with different crystallinity degree are presented. It was found, when treatment of aluminosilicate grain by alkali activator leads to the grain solubilizing (but differently depending on crystallinity degree of aluminosilicate) and formation of alkali-aluminosilicate gel that reacts with unreacted part of the grain according to structure affinity principle. It was also determined the crystallinity degree of aluminosilicate component is inversely proportional to its solubility in highly-alkali environment. The model of structure formation for geopolymer system under alkali effect is offered.
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6. Shekhovtsova J., Zhernovsky I., Kovtun M., Kozhukhova N., Zhernovskaya I., Kearsley P E. Estimation of fly ash reactivity for use in alkali-activated cements – a step towards sustainable building material and waste utilization. Journal of Cleaner Production. 2018. 178. P. 22 – 33.
7. Sobolev K. Modern developments related to nanotechnology and nanoengineering of concrete. Frontiers of Structural and Civil Engineering. 2016. 10 (2). P. 131 – 141.
8. Vivian F.-I., GK Pradoto R., Moini M., Kozhukhova M., Potapov V., Sobolev K. The effect of SiO2 nanoparticles derived from hydrothermal solutions on the performance of portland cement based materials. Frontiers of Structural and Civil Engineering. 2017. 11 (4). P. 436 – 445.
9. Wang Y.S., Provis J.L., Dai J.G. Role of soluble aluminum species in the activating solution for synthesis of silico-aluminophosphate geopolymers. Cement and Concrete Composites. 2018. 93. P. 186 – 195.
10. Davidovits J. Recent Progresses in Concretes for Nuclear Waste and Uranium Waste Containment. Concrete International. 1994. 16 (12). P. 53 – 58.
11. Kalashnikov V.I., Hvastunov N.I., Maktridin A.A. i dr. Novye geopolimernye materialy iz gornyh porod, aktivirovannye malymi dobavkami shlakov i shchelochej Stroitel'nye materialy. 2006. 6. P. 93 – 95. (rus.)
12. Pacheco-Torgal F., Castro-Gomes J., Jalali S. Alkali-activated binders: A review Part 1. Historical background, terminology, reaction mechanisms and hydration products. Construction and Building Materials. 2008. 22. P. 1305 – 1314.
2. ZHernovskij I.V., Osadchaya M.S., CHerevatova A.V. i dr. Alyumosilikatnoe nanostrukturirovannoe vyazhushchee na osnove granitnogo syr'ya. Stroitel'nye materialy. 2014. 1-2. P. 38 – 41. (rus.)
3. ZHernovskij I.V., Kozhuhova N.I., CHerevatova A.V. i dr. Upravlenie strukturoobrazovaniem gip-sokremnezemistyh vyazhushchih pri poluchenii zharostojkih kompozitov. Stroitel'nye materialy. 2018. 8. P. 4 – 8. (rus.)
4. Galindo Izquierdo M., Querol X., Davidovits J., Antenucci D., Nugteren H. W., Fernández-Pereira C. Coal fly ash-slag-based geopolymers: microstructure and metal leaching. Journal of hazardous materials. 2009. 166 (1). P. 561 – 566.
5. Kozhuhova N.I., ZHernovskij I.V., Sobolev K.G. Vliyanie razlichij rentgenoamorfnoj fazy v sostave nizkokal'cievyh alyumosilikatov na prochnostnye harakteristiki geopolimernyh system. Vestnik Belgorodskogo gosudarstvennogo tekhnologicheskogo universiteta im. V.G. SHuhova. 2018. 4. P. 5 – 12. (rus.)
6. Shekhovtsova J., Zhernovsky I., Kovtun M., Kozhukhova N., Zhernovskaya I., Kearsley P E. Estimation of fly ash reactivity for use in alkali-activated cements – a step towards sustainable building material and waste utilization. Journal of Cleaner Production. 2018. 178. P. 22 – 33.
7. Sobolev K. Modern developments related to nanotechnology and nanoengineering of concrete. Frontiers of Structural and Civil Engineering. 2016. 10 (2). P. 131 – 141.
8. Vivian F.-I., GK Pradoto R., Moini M., Kozhukhova M., Potapov V., Sobolev K. The effect of SiO2 nanoparticles derived from hydrothermal solutions on the performance of portland cement based materials. Frontiers of Structural and Civil Engineering. 2017. 11 (4). P. 436 – 445.
9. Wang Y.S., Provis J.L., Dai J.G. Role of soluble aluminum species in the activating solution for synthesis of silico-aluminophosphate geopolymers. Cement and Concrete Composites. 2018. 93. P. 186 – 195.
10. Davidovits J. Recent Progresses in Concretes for Nuclear Waste and Uranium Waste Containment. Concrete International. 1994. 16 (12). P. 53 – 58.
11. Kalashnikov V.I., Hvastunov N.I., Maktridin A.A. i dr. Novye geopolimernye materialy iz gornyh porod, aktivirovannye malymi dobavkami shlakov i shchelochej Stroitel'nye materialy. 2006. 6. P. 93 – 95. (rus.)
12. Pacheco-Torgal F., Castro-Gomes J., Jalali S. Alkali-activated binders: A review Part 1. Historical background, terminology, reaction mechanisms and hydration products. Construction and Building Materials. 2008. 22. P. 1305 – 1314.
Kozhukhova N.I., Strokova V.V., Kozhukhova M.I., Zhernovsky I.V. Structure formation in alkali activated aluminosilicate binding systems using natural raw materials with different crystallinity degree. Construction Materials and Products. 2018. 1 (4). P. 38 – 43. https://doi.org/10.34031/2618-7183-2018-1-4-38-43