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1	Development Of Pozzolanic Lime Mortars For The Repair Of Historic Masonry Guney, Bilge Alp 01 February 2012 (has links) (PDF) The use of lime mortars with pozzolanic additives is of special importance for the repair of historic masonry. In this study, the effect of pozzolanic materials on the final characteristics of mortars was investigated. Metakaolin, fly ash and historic brick powder were used as pozzolanic materials in mortar mixes with varying binder:pozzolan:aggregate ratios. Historic mortar samples from rubble stone masonry of Kahta Castle, a medieval structure in close vicinity of the Nemrut Dag Monument, were also investigated to serve as a starting point for the preparation of repair mortars. Physical and physicomechanical tests, optical microscopy, chemical tests, SEM-EDX and XRD analyses were used to assess the properties of the historic mortars and repair mortars. Fat lime was found to be used in historic mortars with a high binder/aggregate ratio. They were observed to have relatively low density and high porosity with an average compressive strength of 7.4 MPa. Historic mortars were determined to have relatively high water vapour permeability and low water impermeability characteristics. In repair mortars setting was found to be predominantly due to carbonation along with pozzolanic reactions. However, abundant presence of stratlingite in mortars with added metakaolin indicated that the pozzolanic reactions preceded carbonation in those mortars. Use of pozzolanic materials increased the uniaxial compressive strength and modulus of elasticity of mortars compared with control samples. Using the same binder:pozzolan:aggregate ratio, highest increase was observed on mortars prepared with added fly ash at the end of 90 days. Durability parameters of repair mortars defined as wet to dry compressive strength were in the very good to excellent range according to Winkler&rsquo / s classification. By using fly ash, design of lime mortars with high water impermeability and high water vapour permeability characteristics was accomplished. Q General Science 1-385
2	Nevada Fall Corridor : a cultural landscape report Gerdes, Marti M. 08 1900 (has links) xv, 298 p. ; ill. (chiefly col.), maps (chiefly col.) A print copy of this thesis is available through the UO Libraries under the call number: AAA F868.Y6 G47 2004 / This study describes existing conditions, evaluates significance and historic integrity, and recommends treatment strategies to preserve historic elements of the Nevada Fall Corridor cultural landscape in Yosemite National Park. It reports findings from field investigation that examined and inventoried landscape features such as stone retaining walls, treadway material, bridges and causeways, and water features on both current-use and abandoned trail segments. The site was examined numerous times over a three-month period, with a followup visit one year later. Libraries and other archives were consulted for written and photographic historic documentation, which were analyzed against current conditions. The process also involved review of comparison documents as well as national guidelines set forth by the National Park Service. / Adviser: Melnick, Robert Z. Nevada Fall Corridor (Calif.) Yosemite National Park (Calif.) Historic preservation Cultural landscapes Vernal Fall Mist Trail John Muir Trail (Calif.) Rustic architecture Parkitecture Historic stonework Historic masonry Stone masonry Trails Olmsted, Frederick Law, 1822-1903 Muir, John, 1838-1914 Sierra Nevada (Calif. and Nev.) Sovulewski, Gabriel Cunningham, Stephen Conway, John Anderson, George C. Panorama Trail Glacier Point Trail Half Dome Benson, Harry C. Snow, Albert

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Development Of Pozzolanic Lime Mortars For The Repair Of Historic Masonry

Nevada Fall Corridor : a cultural landscape report