Engineering properties of historic brick – variability considerations as a function of stationary versus nonstationary kiln type

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Title: Engineering properties of historic brick – variability considerations as a function of stationary versus nonstationary kiln type
Authors: Laefer, Debra F.
Boggs, Justin
Cooper, Nicole
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Date: 2004
Online since: 2012-05-11T16:08:19Z
Abstract: Brick produced prior to the mid-twentieth century exhibit high levels of variability in appearance, geometry, and mechanical properties. Understanding historic brick variability is important for accurate performance prediction of existing structures, and for the selection of appropriate replacement units. A lack of uniformity amongst historic brick can be caused by the molding and firing methods, as well as the composition of their raw materials. This paper focuses on one aspect of production-induced disparities: kiln type. Tremendous variance can be shown from this alone, between both kiln type and even within a single firing. Although kilns of past eras were constantly improved for energy efficiency, their products continued to be highly inconsistent in appearance and performance. This paper presents the mechanics of heat distribution in kilns and demonstrates its direct impact on the variability of engineering properties due to inconsistent heat application.
Funding Details: Not applicable
Type of material: Journal Article
Publisher: American Institute of Conservators
Journal: Journal of the American Institute of Conservation of Historic and Artistic Works
Volume: 4
Issue: 3
Start page: 255
End page: 272
Copyright (published version): 2004 American Institute for Conservation
Keywords: BrickMasonry unitKilnStrength variabilityHistoricAbsorption
Subject LCSH: Bricks--Mechanical properties
Historic buildings--Maintenance and repair
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Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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