Composite cement with improved reactivity and method for manufacturing it

US11970422B2 · kind B2 · utility

Assignee

• HCONNECT 2 GMBH · DE

Inventors

• Frank Bullerjahn · Leimen, DE
• Sigum Kjaer Bremseth · Heidelberg, DE
• Kjell Skjeggerud · Heidelberg, DE
• Wolfgang Dienemann

Key dates

• Filing date: Apr 25, 2022
• Grant date: Apr 30, 2024
• Expiry date: Jun 28, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Composite cement with improved reactivity and improved fresh properties comprising a hydraulic cement or a caustic activator, a hyaloclastite as pozzolan containing 45-62 wt.-% SiO2, 10-20 wt. % Al2O3, 6-15 wt.-% Fe2O3, 7-15 wt.-% CaO, 7-15 wt.-% MgO, 1.5-4 wt. % (K2O+Na2O), and having 0-5 wt.-% loss on ignition at 950° C. and ≥50 wt.-% X-ray amorphous phase, and a carbonate filler with an at least bimodal particle size distribution adapted to provide a slope n in a Rosin-Rammler-Sperling-Bennett distribution curve of ≤1.15 in a particle size distribution of the composite cement; a method for manufacturing it, as well as use of a composition comprising the hyaloclastite as pozzolan and the carbonate filler as mineral addition for composite cements comprising a hydraulic cement or a caustic activator.