HEIDELBERGCEMENT AG

Development of composite cements characterized by low environmental footprint and appreciable performance

All authors

1 Modelled compositions of cements

2 Calculated porosity at 28 days of hydration

3 Predicted compressive strength at 7 days of hydration

4 Predicted compressive strength at 28 days of hydration

5 Specific CO₂ emissions for the composite cements depending on the cement composition

6 Environmental efficiency – Effective global warming potential at 28 days of hydration

7 Compressive strength after different times

This contribution reports on the optimization of the multicomponent CEM II/C-M (S-LL) cement, a cement type which is intended to be introduced with a revised version of the EN 197-1. The replacement of Portland cement clinker has been maximized by a combination of granulated blast-furnace slag and limestone while meeting an adequate cement performance and minimizing its environmental impact.

1 Introduction

The partial replacement of Portland cement clinker by supplementary cementitious materials (SCM) is more and more in the focus of cement research. The main reason for this development is the potential to limit the CO₂ emission associated with the production of Portland cement clinker [1]. The availability of highly reactive main constituents in accordance with EN 197-1, e.g. of granulated blast-furnace slag, are limited to meet the demand of only about 20 wt.-% of global cement production and are unlikely to increase [1]. The application of another well-known SCM, limestone, is...

TEXT Gerd Bolte, Maciej Zajac, Jan Skocek, Mohsen Ben Haha, Global R&D, HeidelbergCement AG, Leimen/Germany

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Issue 4/2021 NATIONAL COUNCIL FOR CEMENT AND BUILDING MATERIALS (NCB)

A review of tertiary cementitious systems: Limestone and fly-ash-based composite cements

1 Introduction The construction industry is one of the largest sources of GHG emissions. Around the world, more concrete is used than any other material. About 10 billion t of concrete are laid each...

Issue 10/2016 NCB/DELHI TECHNOLOGICAL UNIVERSITY

Investigations on composite cement containing Indian fly ash and granulated blast furnace slag

The world today faces the gravest challenge in terms of the ever increasing level of greenhouse gas emissions and their impact on global warming coupled with fast depleting natural resources. The use...

Issue 6/2021 NATIONAL COUNCIL FOR CEMENT AND BUILDING MATERIALS (NCCBM)

Investigations into calcined clay cements containing limestone as compared with calcined clay cements containing marble dust

1 Introduction Worldwide cement demand is increasing continuously due to the increasing population and infrastructural requirements. The annual global cement production is predicted to reach around...

Issue 12/2009

Physical and mechanical properties of composite cements

1 Introduction Reuse of some industrial waste materials has become very important during the past decade because of environmental regulations that require waste disposal minimization [1]. Granulated...

Issue 4/2016 HEIDELBERGCEMENT TECHNOLOGY CENTER

Limestone requirements for high-limestone cements

1 Introduction Among endeavours for reduction of climate-relevant CO2 emissions in the cement industry, particular importance is attached to the replacement of Portland cement clinker by other main...