The Testing of Ceramics in Construction (Testing in by David Doran

By David Doran

A advisor to checking out the most ceramic parts utilized in the development undefined. usual exams on basic items resembling bricks, tiles and pipes are defined and the way those translate into useful strategies. the vast majority of authors were desirous about the drafting of Europe-wide criteria, leading to authoritative statements in regards to the selection of attempt systems, the cutting-edge, point of compromise and parts the place no compromise is feasible. it is a thorough therapy of ecu perform which reveals attractiveness all over the world. Chapters overlaying greater components akin to partitions, full-scale exams, in addition to version and speeded up trying out, are incorporated. exams focus often on new items or constructions and strategies for facing the functionality and of latest constructions are integrated, as are codes and criteria wherein brick masonry is designed and defined. the long run position of attempt approach improvement utilizing it truly is mentioned with its linked power merits.

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36 – 01 Ceramics Part 1 16/2/05 9:19am Page 37 M ATERIALS TESTING 9 8 400 7 No. of winters 6 300 5 4 200 3 2 100 1 0 No. 12 Calibration of the BCRL panel freezing test against exposure site results. Relation between laboratory and natural freeze/thaw cycles to produce failure. The method was eventually issued as a Draft for Public Comment (BSI, 1991), but was prevented from being adopted as a standard test when a moratorium on further development of British Standards was declared pending the introduction of European Standards.

The mortar used is typically 1:4 high alumina cement:sand mix, which allows the panels to be handled within 2 days. Portland cement mixes may also be employed, but require longer curing times. No evidence has been produced to show that the type of mortar has any influence upon the performance of the bricks. After curing, the panel is completely immersed in water at room temperature for a period of 7 days. The soaked panel is then installed vertically in the test cabinet, with the normally exposed face of the panel open to the test conditions and the remaining surfaces encased in a closely fitting jacket of expanded polystyrene.

Obviously, against this background it is important for manufacturers, specifiers and designers to appreciate the potential differences in compressive strength resulting from the two methods of test. In particular in retaining the identity of class A and B engineering bricks in the UK, it will be necessary to increase the respective minimum mean compressive strength values appreciably. These are given in the national annex to BSEN 771-1. 7 Compressive strength of clay bricks. Comparison of BS3921 and BSEN 771–1.

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