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Historic Preservation and Conservation

University of Pennsylvania

Sandstone

Publication Year

Articles 1 - 4 of 4

Full-Text Articles in Architecture

Evaluation Of Cementitious Injection Grouts For The Stabilization Of Holly Tower Support Rock, Hovenweep National Monument, Naima A. Sweeting Jan 2014

Evaluation Of Cementitious Injection Grouts For The Stabilization Of Holly Tower Support Rock, Hovenweep National Monument, Naima A. Sweeting

Theses (Historic Preservation)

This thesis addresses the testing and evaluation of the use of a cementitious injection grout for the reattachment of detached slabbing on the sandstone support rock of Holly Tower at Hovenweep National Monument. This research follows on a previous condition assessment and diagnosis of the deterioration of the sandstone support rock and the effects of consolidation on the rock as the first step in a multi-phase conservation program.

The extreme instability of the slabbing on the west side of the support rock requires remedial intervention that will retain and reattach the slab to the parent rock. Injection grouting was identified ...


Control Of Biodeterioration Of Sandstone On The Fisher Fine Arts Library, Jessica A. Focht Jan 2013

Control Of Biodeterioration Of Sandstone On The Fisher Fine Arts Library, Jessica A. Focht

Theses (Historic Preservation)

The study focuses on the presence of biocolonization on the Fisher Fine Arts Library, where two visually distinct types of biocolonization are found, green and black. The former grow in the damper, lower courses, while the latter occurs in the middle courses. The top courses of the apse are protected from rain so no apparent colonization is seen there. Biodeterioration is any undesirable change in the properties of a material caused by the vital action of organisms. The most used methods to control and prevent biodeterioration are to eliminate biocolonization through the application of biocides. The presence of biocolonization is ...


Effect Of The Brownstone Moisture Content At Application Time Of A Water Repellent Treatment, Yun Liu Jan 2013

Effect Of The Brownstone Moisture Content At Application Time Of A Water Repellent Treatment, Yun Liu

Theses (Historic Preservation)

Portland brownstone is a widely used building material that is susceptible to severe deterioration from weathering. This type of stone contains expansive clay minerals that may cause damage during wetting/drying cycles. Water repellent treatments could, in principle, reduce this problem. The study presents results obtained from water vapor transmission tests, sorption isotherms, and hygric linear expansion of Portland brownstone treated with two types of water repellent, water based Siloxane PD and solvent based Natural Stone. The treatments were applied at two different moisture contents of the stone samples. The results obtained from the various tests showed no significant differences ...


Consolidation Treatments For The Alveolar Erosion Of The Agrillaceous Sandstone At Durham Castle, Mary Catherine Collins Jan 2012

Consolidation Treatments For The Alveolar Erosion Of The Agrillaceous Sandstone At Durham Castle, Mary Catherine Collins

Theses (Historic Preservation)

The thesis addresses possible consolidation treatments for the sandstone masonry of Durham Castle, a UNESCO World Heritage site located in Durham, England. The historic masonry is made of an argillaceous sandstone that suffers a unique deterioration phenomenon known as alveolar erosion. Alveolar erosion is a problem that relates to the geo-chemical nature of the stone, particularly the presence of swelling clays. Two treatments were considered in this thesis: a plain ethyl silicate (Prosoco OH100), and an elastified ethyl silicate (Remmers KSE 300 E). The performance of each treatment was compared through laboratory testing of the following properties: water absorption and ...