1 Head of Sustainability & Construction Materials, Ceram Research Ltd, Stoke on Trent, Staffordshire, ST4 7LQ, United Kingdom, andrew.smith@ceram.com
2 Senior Marketing Manager Materials, Lhoist, rue de l’ industrie, 31, B-1400 Nivelles Belgium, frederik.verhelst@lhoist.com
3 Marketing Manager Construction, Carmeuse Europe, Bd de Lauzelle 65, B-1348 Louvain-la-Neuve, Belgium, christophe.denayer@carmeuse.com
4 Technical Sales Manager, Buxton Lime & Cement, Tarmac Limited, Tunstead House, Buxton, SK17 8TG United Kingdom, richard.givens@buxtonlime.co.uk
ABSTRACT
The European Lime Association (EuLA) have instigated a project investigating the benefits
The European Lime Association (EuLA) have instigated a project investigating the benefits associated with the addition of hydrated lime to cement based mortars, and more importantly, what gaps exist in the evidence in respect of the benefits of hydrated lime additions to workability, bond strength development, durability and in addition the modes of failure of mortars and the impact of lime additions. The project brings together experts from across Europe from both industrial, academic and commercial research & technical establishments, with the aim to produce the definitive guide on the benefits of lime addition to cement based mortars.
This paper focuses on the investigation and assesses the benefits of hydrated lime additions to cement based mortars in respect of mortar and masonry durability, namely:
• Thermal & Moisture Movement in Masonry
• Resistance to Rain Penetration
• Resistance to Salt Crystallization and Chemical Attack
• Frost Resistance
The paper reviews the existing scientific literature and reports on the need for more research to specifically investigate areas where there are tangible and measurable benefits to the performance of the cement based mortar by the addition of hydrated lime.
In addition the paper examines the underlying modifications and changes in the mortar structure and composition, and what impact this has had in the development of the physical properties being investigated.
KEYWORDS: hydrated lime, mortar, durability, rain penetration, movement, salt crystallization
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