Impact of limestone fineness on cement hydration at early age

Journal Article · Wed Sep 15 04:00:00 EDT 2021 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2021.106515· OSTI ID:23206243

Briki, Yosra ^[1]; Zajac, Maciej; Haha, Mohsen Ben ^[2]; Scrivener, Karen ^[1]

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1. Laboratory of Construction Materials, EPFL, 1015 Lausanne (Switzerland)
2. Heidelberg Technology Center GmbH, Rohrbacher Str.95, 69181 Leimen (Germany)

This study compares the influence of two limestone fineness on strength development and cement hydration. The replacement of clinker by 20% of fine limestone (d{sub v,50} = 2 μm and SSA = 4,21 m{sup 2}/g) gives similar strength development to PC up to 7 days. Fine limestone enhances cement hydration and offsets the dilution effect caused by the decrease of clinker amount. The accelerating effect of the limestone was explained by a higher degree of undersaturation with respect to C{sub 3}S. The influence of coarse limestone (d{sub v,50} = 130 μm and SSA = 0,46 m{sup 2}/g) on cement hydration is limited to dilution effect. The combination of fine and coarse limestone was also studied. A linear correlation was obtained between strength and gel space ratio for all investigated systems. Furthermore, the results showed that despite the similarity of specific surface area, limestone is more effective than quartz for the enhancement of cement hydration.

• OSTI ID: 23206243
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Vol. 147; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CEMENTS
COMPARATIVE EVALUATIONS
CORRELATIONS
DILUTION
GELS
HYDRATION
LIMESTONE
QUARTZ
SPECIFIC SURFACE AREA