Title: A Method For Determining The Air content Of Freshly Mixed Mortars And Concretes

Author(s): J. C. Pearson and H. G. Collins

Publication: Journal Proceedings

Volume: 32

Issue: 1

Appears on pages(s): 298-308

Keywords: none

DOI: 10.14359/8383

Date: 1/1/1936

Abstract:
This method involves the use of a pycnometer, or weighing I4 in high of made of 5 in. diameter brass pipe, in which a IO to I5 lb sample of concrete is accurately weighed and its absolute volume accurately determined. The difference between the absolute volume and the bulk volume mined in the usual weight-per-unit-volume operation, gives the volume of entrained air. Calibrated weights and a sensitive capacity are required.balance of fairly large