Our work

Mortars and Masonry

The usual masonry material for exterior walls is brick, with some historic buildings built with natural stone. Mortar - a mixture of water, binder (cement, lime), fine sand and additives - holds the bricks together. The open pore structure of brick allows transport of moisture and salt solutions. TNO investigates modern and historic mortars and advises on measures to deal with damaged masonry.

The effective repair of historic masonry requires new restoration mortars to be compatible with historic material already present. TNO has the expertise to ascertain this compatibility, by determining the composition of the mortars in existing masonry and examining its microstructure, along with the nature of the damage. For specific projects and circumstances we assess the performance of mortars in the laboratory.

TNO is developing masonry desalination methods and various other techniques for preventing long-term damage. Two other current research themes are making masonry resistant to biodeterioration and the development of additives to enhance the salt-resistance of mortars.

Our work

Natural stone

Virtually every important monument in the Netherlands contains a substantial amount of natural stone. Conserving those monuments is not only of national interest from both a historical and cultural perspective,... Read more

Dr. Timo Nijland

Contact

Dr. Timo Nijland

  • Built cultural heritage
  • monuments
  • conservation
  • natural stone
  • buildig materials
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