Processes of cement stone structure formation in presence of additives made of TPP waste of various compositions analysis

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Abstract

Althouhg the usage of combination of cement and various types of man-made raw materials from fuel and energy plants waste has long history, the study of the nature and mechanisms of fly ash and binder interaction is still relevant. This is due to the constantly changing variability of the fly ash properties because of fluctuations in the technological factors of its formation. The present work is about the study of the heat release kinetics during cement hydration in presence of additives from a wide sample of man-made raw materials (three acidic and two alkaline fly ash), as well as the study of structure formation processes during various periods of hardening with use of scanning electron microscopy. This made it possible to differentiate the reactions which leads to the main phases composing the cement stone are formed in dependence of the fly ash particles composition and structure. As a result, theoretical and experimental data on the nature of the interaction of the fly ash various types with cement have been supplemented, reflecting key factors (the content of oxides of CaO, SiO2, Al2O3, Fe2O3) that contribute to active structure formation, and secondary factors that leveling the process of gaining the binder brand strength (particles content other than spherical shape; the presence of carbonaceous impurities).

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About the authors

I. Y. Markova

Belgorod State Technological University named after V.G. Shukhov

Author for correspondence.
Email: irishka-31.90@mail.ru

Candidate of Sciences (Engineering)

Russian Federation, 46, Kostyukova Street, Belgorod, 308012

V. V. Strokova

Belgorod State Technological University named after V.G. Shukhov

Email: vvstrokova@gmail.com

Doctor of Sciences (Engineering)

Russian Federation, 46, Kostyukova Street, Belgorod, 308012

M. A. Stepanenko

Belgorod State Technological University named after V.G. Shukhov

Email: stepanencko.rita2017@yandex.ru

Senior lecturer

Russian Federation, 46, Kostyukova Street, Belgorod, 308012

M. N. Sivalneva

Belgorod State Technological University named after V.G. Shukhov

Email: 549041@mail.ru

Candidate of Sciences (Engineering)

Russian Federation, 46, Kostyukova Street, Belgorod, 308012

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Supplementary files

Supplementary Files
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1. JATS XML
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2. Fig. 1. Variability of the calculated criteria characterizing the activity of the studied fly ash: basicity modulus (Mo); silicate (silica) modulus (Mс); quality coefficient K

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3. Fig. 2. Kinetics of heat release during cement hydration according to calorimetry data: а – without additives; b – with fly ash from Troitskaya SRPP (1); c – with fly ash from Reftinskaya SRPP; d – with fly ash from Kemerovo SRPP; e – with fly ash from Nazarovskaya TPP; f – with fly ash from Troitskaya SRPP (2)

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4. Fig. 3. Structural features of cement stone in the presence of various types of sol-entrainment after 3 days of hardening: а – Troitskaya SRPP (1); b – Reftinskaya SRPP; c – Kemerovo SRPP; d – Nazarovskaya TPP; e – Troitskaya SRPP (2)

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5. Fig. 4. Structural features of cement stone in the presence of various types of sol-entrainment after 14 days of hardening: а – Troitskaya SRPP (1); b – Reftinskaya SRPP; c – Kemerovo SRPP; d – Nazarovskaya TPP; e – Troitskaya SRPP (2)

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6. Fig. 5. Structural features of cement stone in the presence of various types of sol-entrainment after 28 days of hardening: а – Troitskaya SRPP (1); b – Reftinskaya SRPP; c – Kemerovo SRPP; d – Nazarovskaya TPP; e – Troitskaya SRPP (2)

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7. Fig. 6. Structural features of cement stone in the presence of various types of sol-entrainment after 90 days of hardening: а – Troitskaya SRPP (1); b – Reftinskaya SRPP; c – Kemerovo SRPP; d – Nazarovskaya TPP; e – Troitskaya SRPP (2)

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8. Table 3. Kinetics of heat release of cement in the presence of additives in the form of fly ash

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