- Author
-
Petersen, P. H.
- Title
- Properties of Some Lightweight-Aggregate Concretes With and Without an Air-Entraining Admixture.
- Coporate
- National Bureau of Standards, Washington, DC
- Report
-
BMS 112,
August 16, 1948,
9 p.
- Keywords
-
concretes
|
aggregates
|
physical properties
|
shales
|
air entrainment
|
heat transfer
|
rainfall
|
water
|
penetration
|
shrinkage
|
wetting
|
drying
|
lightweight aggregates
- Abstract
- The physical properties of several lightweight aggregate portland cement concretes made with burned shale or expanded slag were investigated at the National Bureau of Standards. Three grades of concrete using each aggregate were made. Air-entrainment of greater than 20 percent is reported for the mixtures leanest in cement, an air-entraining admixture being used to increase the workability of all but the richest concretes. Compressive, transverse, and bond strengths are given as well as resistance to heat transfer, rain penetration, and water penetration by capillarity. Also included are the coefficients of thermal expansion, shrinkage, and values for change in length due to wetting and drying.