View in EDS

СТРУКТУРООБРАЗОВАНИЕ ПОРТЛАНДЦЕМЕНТА, МОДИФИЦИРОВАННОГО ОТХОДАМИ МЕТАЛЛУРГИЧЕСКОГО ПРОИЗВОДСТВА

Saved in:
Bibliographic Details
Title: СТРУКТУРООБРАЗОВАНИЕ ПОРТЛАНДЦЕМЕНТА, МОДИФИЦИРОВАННОГО ОТХОДАМИ МЕТАЛЛУРГИЧЕСКОГО ПРОИЗВОДСТВА
Publisher Information: Zenodo, 2025.
Publication Year: 2025
Subject Terms: X-ray phase analysis, structure formation, cement stone, burnt moulding waste, superplasticiser, hydration kinetics, pozzolanic reaction, synergistic effect
Description: This paper presents the results of a comprehensive study of the effect of a filler based on burnt moulding waste (BMW) and a superplasticiser on the phase composition and structure formation of cement stone at early (1 day) and late (28 days) stages of hardening. X-ray phase analysis (XPA) has established that BFA has a powerful accelerating effect on the hydration of clinker minerals in the first day, which is explained by the adsorption of calcium ions on their surface, while the superplasticiser, on the contrary, slows down this process. A synergistic effect of the combined use of additives has been demonstrated, which negates the retarding effect of the superplasticiser and leads to the intensive formation of hydrate phases at an early stage. By day 28, a significant decrease in the content of portlandite (Ca(OH)2) and an increase in the proportion of amorphous calcium hydrosilicate (C-S-H) by 22% are observed in the modified cement stone, which indicates the occurrence of an active pozzolanic reaction. The data obtained confirm that complex modification allows effective control of the hydration kinetics and the formation of a dense, highly structured cement stone matrix, which is a key factor in improving its strength and performance characteristics.
Document Type: Article
DOI: 10.5281/zenodo.17109415
Rights: CC BY
Accession Number: edsair.doi...........0cc4249e48e957d8256632176a03936a
Database: OpenAIRE
Description
Abstract:This paper presents the results of a comprehensive study of the effect of a filler based on burnt moulding waste (BMW) and a superplasticiser on the phase composition and structure formation of cement stone at early (1 day) and late (28 days) stages of hardening. X-ray phase analysis (XPA) has established that BFA has a powerful accelerating effect on the hydration of clinker minerals in the first day, which is explained by the adsorption of calcium ions on their surface, while the superplasticiser, on the contrary, slows down this process. A synergistic effect of the combined use of additives has been demonstrated, which negates the retarding effect of the superplasticiser and leads to the intensive formation of hydrate phases at an early stage. By day 28, a significant decrease in the content of portlandite (Ca(OH)2) and an increase in the proportion of amorphous calcium hydrosilicate (C-S-H) by 22% are observed in the modified cement stone, which indicates the occurrence of an active pozzolanic reaction. The data obtained confirm that complex modification allows effective control of the hydration kinetics and the formation of a dense, highly structured cement stone matrix, which is a key factor in improving its strength and performance characteristics.
DOI:10.5281/zenodo.17109415