1. Introduction Brief overview of foundation water issues in historic buildings

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1 CS06a Foundation Water-Proofing for Historic Buildings Jessica Reske, AIA, LEED AP, SLATERPAULL Architects; Gerhard Petri, AIA, Slaterpaull Architects, Inc. 1. Introduction Brief overview of foundation water issues in historic buildings 2. Water-proofing solutions Excavate, water-proof, backfill Bentonite injection Chemical damp-course Physical barrier 3. Constructability considerations Excavate, water-proof, backfill Site constraints Depth of foundation Material of foundation Condition of foundation 4. Cost considerations Cost comparison: excavation & water-proofing versus injection strategy Construction cost for chemical damp-course Construction cost for physical moisture barrier 5. Effectiveness of strategies Moisture meter testing before and after water-proofing measures 6. Appearance / Results Comparison Exterior appearance Interior appearance 7. Conclusions

2 CS06b The Significance of Local Earthen Heritage, an Interdisciplinary Intervention in Northern Argentina María Carolina Rivet, National Scientific and Technical Research Council (CONICET) Argentina, Interdisciplinari Institute Tilcara; Julieta Barada, National Scientific and Technical Research Council (CONICET) Argentina, School of Architecture, Universidad de Buenos Aires First Part 1. Introduction Overview of the study area in the Argentine highlands. Considerations about earthen architecture in the area Presentation of the town of Coranzulí. History, enviroment and population 2. Contextualization of the intervention The role of the indigenous community in a participative work. 3. Theoretical framework Discussions about local heritage Particularities of earthen built heritage Second Part 4. Methodologies Definition of intervention methodologies along with the community Technical description of the restored building Pathologies and general condition 5. Presentation of results Analysis of the working process. Interventions in structural terms: walls and thatched roof Historic graffiti, plaster and ornaments according to the original aspect 6. Discussion of results and final considerations Reflections on joint working with communities in preserving their heritage: achievements, strategies and challenges

3 CS06c Conservation Strategies Through Digital Operations, Documentation, Assessment and Visualization of Sixteenth-century Mixtec Ribbed Vaults Benjamin Ibarra Sevilla, Assistant Professor, University of Texas, Austin 1. The sixteenth-century ribbed vaults in Mixteca, Oaxaca Location of the three buildings Historic context; when and why were these buildings built Building s construction; technology and materials 2. Documentation Methodology, data processing and analysis 3D scanning and point-clouds Point clouds Sixteenth-century Spanish manuscripts; vaults design and proportioning rules Underlying geometry; orthographic projections of the vaults through point cloud analysis Stereotomy; documentation data processing for stonecutting, geometry and structural stability Digital visualization; digital animations and 3D scanning 3. Conservation Strategies Assessment of the structures Conservation strategies and recommendations Stone carving techniques and restoration procedures

4 CS06d Restoration of Catoctin Aqueduct Denis McMullan, PE, SECB, McMullan & Associates, Inc 1. History of C&O Canal Location, length, 11 stone aqueducts, time period What is an aqueduct? Define terms (berm parapet, towpath parapet, prism, water table, voussoirs) Similar structural failure mode of all C&O aqueduct 2. Comparison of European and American Aqueducts Why did C&O aqueducts fail and European still in use European construction Comparison to Cross Section 3. Restrictive Design Criteria for C&O canal Need for higher clearance for river tributaries commerce and river flow Comparison of span to rise of European to C&O aqueducts Gravity feed restricted top elevation 4. History of Catoctin Aqueduct Collapse Early problems with water tightness Early figure of Berm Parapet Design problems with unbalanced arches and elliptical center arch Structural analysis diagram of predictive failure shape Actual elevation of aqueduct before failure Actual collapse 5. Reconstruction objectives Restore 3 arch aqueduct for failure rewatering Leave remaining stone structure in place Rebuild using maximum amount of original historic stones voussoirs- Fix design aqueduct weaknesses Design aqueduct to withstand flooding

5 6. Restoration Design Structural strengthening Recover of original stones Solving problems of identifying, measuring and matching stones New stone in place 7. Construction Sequence Original condition Restore piers Install adjustable forms and construction concrete arch Original and new stone ring arch on forms Water though, parapets, railings, mule rail

6 CS06e. The Comparative Analysis of Biological Growth and Common Cleaners Based on Organism Identification and Biological Mechanisms Jennifer Pont, M.S. Historic Preservation, Columbia University Helen Thomas-Haney, Columbia University 1. Introduction a. What is biodeterioration? b. Types of biological growth and their mechanisms of deterioration Algae Bacteria Lichen Fungi Higher plants c. Overview Biodeterioration and biological growth Hypothesis relationship between biological growth and biological growth cleaners Results of testing and analysis Long-term potential for viable regrowth d. Why this research is different from other current research A combination of two methodologies in order to optimize cleaning and removal of biological growth. Testing Program Choice of cleaners Choice of biological growth Methodology for testing 2. Results and analysis How different growths reacted The different performances of the tested products 3. Conclusions a. Correlation between the efficacy of cleaners and biological growth summary of results. b. How this information can be built on and benefit conservation.