Электрокинетические и микроструктурные особенности гидратации портландцемента в присутствии добавок в воде затворения
Дата
2016
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Назва журналу
Номер ISSN
Назва тому
Видавець
НТУ "ХПИ"
Анотація
Представлены результаты электрокинетических измерений в реакционной системе "портландцемент – вода – добавка". Проведено сопоставление изменений температуры, окислительно-восстановительного потенциала, концентрации ОН⁻-ионов и значений рН в системе "портландцемент – вода – добавка" в зависимости от времени гидратации. Установлены закономерности и особенности влияния каждой из исследуемых добавок на процессы гидратационного структуро- и фазообразования в портландцементном тесте в ранние сроки твердения. Исследовано микроструктуру и поверхности излома образцов цементного камня, образовавшегося при твердении цементного теста с оптимальным содержанием добавок. Отображены особенности гидратационных процессов в микроструктуре цементного камня.
The paper sets out the resultant electrokinetic evaluations of “Portland-cement – water – additive” investigated system. A comparison of the temperature, redox potential, ОН⁻-ions amount and pH values changes in “Portland-cement – water – additive” system depending on the hydration time has been carried out. Influence features of additives investigated on structure and phase forming processes of hardened Portland-cement paste in early curing times were determined. A probability of directed synthesis the crystallohydrate phases required combination, the desired morphology crystal growth, and also unstable solid solutions structure stabilization along with cement stone density and strength increasing are critically dependent on effect of reaction system electrokinetic variables. The microstructure and fracture surface of cement stone specimens obtained during the cement paste with optimum additives amount curing have been investigated. The cement stone microstructure hydration processes features are shown. The mutual individual phase arrangement into the crystallohydrate splices of cement stone and its microstructure porosity were studied. It is directly correlated to the electrokinetic variables performance corresponds with the latest curing times of cement stone.
The paper sets out the resultant electrokinetic evaluations of “Portland-cement – water – additive” investigated system. A comparison of the temperature, redox potential, ОН⁻-ions amount and pH values changes in “Portland-cement – water – additive” system depending on the hydration time has been carried out. Influence features of additives investigated on structure and phase forming processes of hardened Portland-cement paste in early curing times were determined. A probability of directed synthesis the crystallohydrate phases required combination, the desired morphology crystal growth, and also unstable solid solutions structure stabilization along with cement stone density and strength increasing are critically dependent on effect of reaction system electrokinetic variables. The microstructure and fracture surface of cement stone specimens obtained during the cement paste with optimum additives amount curing have been investigated. The cement stone microstructure hydration processes features are shown. The mutual individual phase arrangement into the crystallohydrate splices of cement stone and its microstructure porosity were studied. It is directly correlated to the electrokinetic variables performance corresponds with the latest curing times of cement stone.
Опис
Ключові слова
портландцемент, добавка, электрокинетические параметры, гидратация, цементный камень, микроструктура, portland-cement, additive, electrokinetic variables, hydration, cement stone, microstructure
Бібліографічний опис
Электрокинетические и микроструктурные особенности гидратации портландцемента в присутствии добавок в воде затворения / В. Н. Шумейко [и др.] // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Хімія, хімічна технологія та екологія. – Харків : НТУ "ХПІ", 2016. – № 35 (1207). – С. 14-24.