Field Guide to Gas Stations in Texas
Renee Benn
Archeology Research Associate
Native American Consultation
Roadside Architecture: A Laboratory for Innovation in Concrete Technology
Reba Ashby
Mortar, Unsung Hero of History
Historic Lime Mortar and Historic Brick
Disaster Preparedness for Cultural Resources
Preparation is Your Best Defense
Advanced 3D Imaging and Morphometrics for Archeologists
Oct 15, 2018 to Oct 18, 2018
Maintaining Historic Wood Windows
Nov 3, 2018 to Nov 4, 2018
Advanced Ground Penetrating Radar
Nov 5, 2018 to Nov 8, 2018
Using Lime
Apr 29, 2019 to May 1, 2019
Wood Identification Workshop
Jan 29, 2019 to Jan 31, 2019
Disasters & Resilience
Sep 21, 2018 to Oct 1, 2018
FAC Africa 2018
Nov 12, 2018 to Nov 28, 2018
Southeastern Archaeological Conference
Nov 14, 2018 to Nov 17, 2018
![MORTAR, unsung hero of history By Johnna Rizzo and Matthew Twombly [Fort sumter survived the opening salvos of the civil war in 1861.] [Today, like for other historic structures, water is its greatest threat.] [It’s also a constant one.] [Rain drenches them.] [Snow clings to them.] [Sprinklers soak their surfaces.] [Water even seeps in from the ground, roof leaks, and air conditioning.] [When the salts it carries crystallize on the outside of buildings, they create a bloom called efflorescence.] [When crystals form within the bricks' pores, as they grow, they break down the bricks from the inside. This causes slices of masonry to peel off, a process called spalling.] [If left unchecked, the salts and water can cause the brick and stone to crack.]](https://www.ncptt.nps.gov/wp-content/uploads/Mortar-Unsung-Hero-of-History-1-150x150.png)
