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Quarterly Journal of Engineering Geology and Hydrogeology
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Quarterly Journal of Engineering Geology and Hydrogeology; 1986; v. 19; issue.2; p. 175-181;
DOI: 10.1144/GSL.QJEG.1986.019.02.09
© 1986 Geological Society of London

Article

Borehole cements and the downhole environment—a review

N. S. Robins

British Geological Survey, Murchison House, , West Mains Road, Edinburgh EH9 3LA

A. E. Milodowski*

* British Geological Survey, , Keyworth, Nottingham NG12 5GG.

A wide range of cements and cement additives are available for borehole construction purposes. The mechanics of cement placement dictate the required properties of the cement slurry, but the borehole environment dictates the cement type. The overall borehole environment is created by the interaction of physical, chemical and biological factors, each of which contribute to cement reactivity and cement durability. Evaluation of borehole cements can be undertaken either using downhole geophysics, or through the investigation of laboratory prepared samples, but neither method usually pays sufficient regard to the borehole environment.