World of Concrete 2023

Joseph Sembrat Principal Conservator
Kelly Caldwell Director of Conservation
January 16-19, 2023
Las Vegas Convention Center

Join Joseph Sembrat, Principal Conservator and Kelly Caldwell, Director of Conservation at the World of Concrete Conference on Thursday, January 19th, from 8:30 – 10:00 AM PST for an informative session on repair and restoration of historic and architectural masonry surfaces.

Repair and Restoration of Historic & Architectural Masonry Surfaces
Proper cleaning of historic concrete and traditional masonry materials requires long-standing as well as modern high-tech means and methods. To avoid damage to historic surfaces with deteriorated masonry materials, it is important to understand the limitations and advantages of different cleaning approaches. New and innovative cleaning techniques including laser ablation, CO2 blasting, chemical poultices, low pressure micro-abrasion and other methods will be discussed along with the uses and benefits of each. Attendees will have a better understanding of masonry substrates and associated cleaning concerns and application methods, in addition to knowing when a conservation professional should be called in due to the significance or sensitivity of the substrate.

1. Describe potential cleaning problems when preserving historic architectural masonry surfaces
2. Identify masonry substrates and parameters required in deciding the best cleaning methods
3. Evaluate commonly used materials and techniques for cleaning masonry architectural surfaces
4. Explain situations when best to consult a conservation professional for historic surfaces treatment

Continuing Education Hours: 1.5 Hours AIA/ CES LU|HSW, PDH, MCAA

Type: WOC 90-Minute Seminars

Session ID: TH119

Location: LVCC North Hall, Room, N253

About The World of Concrete:
World of Concrete has been serving the global concrete & masonry construction industries for 49 years. The World of Concrete connects and educates buyers and sellers through live and digital events throughout the year, facilitated via and The goal is to provide this important community with the connections, intelligence, and opportunities that help customers grow, do business, and make better informed business decisions.