Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hydration Characteristics of Cementitious Paste with Low Grade Limestone
https://orcid.org/http://orcid.org/0000-0002-3332-2271
https://orcid.org/http://orcid.org/0000-0002-2358-1261
In limestone quarries, a major portion of limestone is rejected because of the presence of large amounts of impurities that makes cement production difficult. Such limestones have a significant potential to be used for replacing clinker in cement. The use of ground limestone powder as cement replacement has proved to be very promising and has led to several developments in terms of binary and ternary binders. Addition of fine limestone accelerates the initial hydration of cement by providing extra sites for nucleation, in addition to forming new products of hydration like carboaluminates, when there is a reactive alumina source present in the binder. This paper reports a study that was conducted to follow the impact of low-grade limestone on the hydration behaviour of cementitious systems by isothermal calorimetry on paste samples and by compressive strength test of mortar specimens The study was conducted for various replacement levels of low-grade limestone (from two different mines in India) and also for different particle sizes of limestone. Addition of low-grade limestone was found to accelerate hydration in cementitious systems. Acceleration in hydration increased with fineness of limestone and was reflected in compressive strength of mortar cubes as well.
Hydration Characteristics of Cementitious Paste with Low Grade Limestone
https://orcid.org/http://orcid.org/0000-0002-3332-2271
https://orcid.org/http://orcid.org/0000-0002-2358-1261
In limestone quarries, a major portion of limestone is rejected because of the presence of large amounts of impurities that makes cement production difficult. Such limestones have a significant potential to be used for replacing clinker in cement. The use of ground limestone powder as cement replacement has proved to be very promising and has led to several developments in terms of binary and ternary binders. Addition of fine limestone accelerates the initial hydration of cement by providing extra sites for nucleation, in addition to forming new products of hydration like carboaluminates, when there is a reactive alumina source present in the binder. This paper reports a study that was conducted to follow the impact of low-grade limestone on the hydration behaviour of cementitious systems by isothermal calorimetry on paste samples and by compressive strength test of mortar specimens The study was conducted for various replacement levels of low-grade limestone (from two different mines in India) and also for different particle sizes of limestone. Addition of low-grade limestone was found to accelerate hydration in cementitious systems. Acceleration in hydration increased with fineness of limestone and was reflected in compressive strength of mortar cubes as well.
Hydration Characteristics of Cementitious Paste with Low Grade Limestone
https://orcid.org/http://orcid.org/0000-0002-3332-2271
https://orcid.org/http://orcid.org/0000-0002-2358-1261
In limestone quarries, a major portion of limestone is rejected because of the presence of large amounts of impurities that makes cement production difficult. Such limestones have a significant potential to be used for replacing clinker in cement. The use of ground limestone powder as cement replacement has proved to be very promising and has led to several developments in terms of binary and ternary binders. Addition of fine limestone accelerates the initial hydration of cement by providing extra sites for nucleation, in addition to forming new products of hydration like carboaluminates, when there is a reactive alumina source present in the binder. This paper reports a study that was conducted to follow the impact of low-grade limestone on the hydration behaviour of cementitious systems by isothermal calorimetry on paste samples and by compressive strength test of mortar specimens The study was conducted for various replacement levels of low-grade limestone (from two different mines in India) and also for different particle sizes of limestone. Addition of low-grade limestone was found to accelerate hydration in cementitious systems. Acceleration in hydration increased with fineness of limestone and was reflected in compressive strength of mortar cubes as well.
Hydration Characteristics of Cementitious Paste with Low Grade Limestone
RILEM Bookseries
Escalante-Garcia, J. Ivan (Herausgeber:in) / Castro Borges, Pedro (Herausgeber:in) / Duran-Herrera, Alejandro (Herausgeber:in) / Asha, B. (Autor:in) / Santhanam, Manu (Autor:in)
RILEM Annual Week ; 2021 ; Merida, Mexico
Proceedings of the 75th RILEM Annual Week 2021 ; Kapitel: 5 ; 38-43
RILEM Bookseries ; 40
11.03.2023
6 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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