Title:
Properties of Sand-Mix Shotcrete
Author(s):
Stanley G. Zynda
Publication:
Symposium Paper
Volume:
14
Issue:
Appears on pages(s):
155-164
Keywords:
DOI:
10.14359/6812
Date:
3/1/1978
Abstract:
Proportions of shotcrete mortar as mixed are compared with proportions of the mix in place. Effect of nozzle velocity on density of the in-place material is explained. Data on unit weight and compressive strength of various mixes are given, noting how test results based on shot cylinders differ from strength tests of cores from actual structural applications. Total water content for any given com-bination of shotcrete mortar materials is constant regardless of mix proportions, provided that the material is placed at the wettest stable consistency-the point of incipient sag. Maximum density in any mix occurs at this water content; hence it is also the point of maximum compressive strength.