Comparison Of Severe Natural Exposure With The Bcrl Freeze/thaw Test For Brickwork

Summary

The freeze/thaw resistance of 14 brick types during ten winters' exposure at a severe climate site in the UK was compared to results from a laboratory test.  This test was developed in the UK and forms the basis of the draft European standard for assessing clay brick freeze/thaw durability.  The test is widely recognised as a reliable accelerated method for assessing the durability of brickwork  in severe conditions.  However, it is important that results  can be demonstrated to relate to those from a severe natural  exposure environment.  The exposure site testing was clearly  able to illustrate the difference in durability between bricks classed as F-category (fully frost resistant) and M-category (moderately frost resistant).  In general terms, each winter of the conditions represented by the severe exposure site was equivalent to about 20 laboratory freeze/thaw cycles in terms of the stresses produced within bricks susceptible to frost damage.  15 refs.

Primary author(s): Stupart A W; Peake F

                            Building Research Establishment; CERAM Building Technology

Source: Masonry (9). Proc.6th Int.Masonry Conf.

            London,4-6 November 2002,p.451-457

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