Effects of the fineness of limestone powder and cement on the hydration and strength development of PLC concrete

•Limestone powder accelerated cement hydration by providing nucleation site.•Limestone addition up to 15wt% improved the compressive strength compared to Plain by formation of new hydration products.•Large surface area of cement clinker is more effective to enhance the strength than that of limeston...

Full description

Saved in:
Bibliographic Details
Published in:Construction & building materials 2017-03, Vol.135, p.129-136
Main Authors: Moon, Gyu Don, Oh, Sungwoo, Jung, Sang Hwa, Choi, Young Cheol
Format: Article
Language:English
Subjects:
Analysis
Cement hydration
Chemical properties
Concretes
Evaluation
Isothermal calorimetry
Limestone powder
Microstructure
Powders (Particulate matter)
Surface area
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Limestone powder accelerated cement hydration by providing nucleation site.•Limestone addition up to 15wt% improved the compressive strength compared to Plain by formation of new hydration products.•Large surface area of cement clinker is more effective to enhance the strength than that of limestone powder. Portland limestone cement (PLC) have been widely used in the world because of its environmental impact, which is less carbon dioxide emissions by using less amount of cement clinkers. Moreover, formation of monocarboaluminates as fillers in cement can improve dense concrete microstructures by reacting with C3A. Also, larger nucleation sites from limestone powder can enhance strengths due to the active cement hydration. Thus, in this study, the effects of the fineness and replacement of limestone powder on the hydration and strength properties of concrete were investigated by X-ray diffraction (XRD), setting times, isothermal calorimetry, compressive strength and mercury intrusion porosimetry techniques. The obtained results showed that the addition of limestone powder accelerated cement hydration by providing nucleation sites for the hydration products, and as a result, the fineness of cement and limestone powder strongly influenced on the hydration reaction and the strength development.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2016.12.189