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Saturday, June 2 • 3:00pm - 3:30pm
(Architecture) Alkoxysilane Sol-Gel Consolidants for Calcareous Stones

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Ancient stone artifacts and architecture deteriorate over time due to environmental factors, air pollution, salt efflorescence, and biodeterioration. As a result, effective stone consolidants are necessary for the conservation and protection of stone materials. Alkoxysilanes are effective stone consolidants, undergoing hydrolysis and condensation to produce a sol-gel coating capable of penetrating the stones porous structure. However, demands for improvements in commercial formulations have led to research efforts focused on increasing flexibility, “breathability” and durability without compromising water repellency and strength. In order to allow water vapor evaporation out of the pores after consolidation application, a “breathable” consolidant is required to permit the transport of water molecules. Polyhedral Oligomeric Silsesquioxane (POSS) structurally contains nano-meter sized pores, allowing for permeability of water molecules out of the stone in addition to added mechanical durability. Polydimethylsiloxane (PDMS) was utilized for increasing flexibility and water repellency. Currrent research is focused on formulating POSS, PDMS, and other additives into alkoxysilane stone consolidants for limestone and marble substrates.

avatar for Alison Rohly

Alison Rohly

Graduate Research Assistant, North Dakota State University
Alison Rohly graduated from Bethel University in the Twin Cities with a Bachelor’s degree in Chemistry. During her time at Bethel, she worked at 3M as a tech aide in the Automotive Aftermarket Division, focusing on polyurethane adhesives for panel repair and basecoats. After graduating... Read More →

avatar for Dr. Dean Webster

Dr. Dean Webster

Professor and Chair of Coatings and Polymeric Materials Department, North Dakota State University
Dr. Dean Webster joined the Coatings and Polymeric Materials Department at North Dakota State University in the fall of 2001. Prior to coming to NDSU, Dr. Webster worked in industry for over 17 years. Beginning in 1984 he worked for the Sherwin-Williams Company where he was involved... Read More →

Saturday June 2, 2018 3:00pm - 3:30pm MDT
Texas Ballroom C Marriott Marquis Houston
  6. Specialty Session, Architecture