The Use of Low-Density Cellular Concrete for Air Convection Embankment to Protect Permafrost Foundations in Cold Regions – 02-17-2021 The Use of Low-Density Cellular Concrete for Air Convection Embankment to Protect Permafrost Foundations in Cold Regions - 02-17-2021 Please register below to view the video: First Name * Last Name * Title * Company Name * Phone Number * Email Address * Comment reCAPTCHA If you are human, leave this field blank.