Sand Grading Influence on Air Entrainment in Concrete

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Title: Sand Grading Influence on Air Entrainment in Concrete

Author(s): M. A. Craven

Publication: Journal Proceedings

Volume: 45

Issue: 11

Appears on pages(s): 205-215

Keywords: no keywords

Date: 11/1/1948

Abstract:
Four series of mixes with various air-entraining agents, cement factors, amd sand grading and content were prepared in order to observe sand grading effect on concrete. Graphic record is presnted of air content and W/C plotted against finess modulus of sand; flow and compressive strength plotted against finess modulus of sand; and air content plotted against percent of No.30-No.50 sand and total sand percentage. Generally the percentage of air entrained in concrete increased with decrease in fineness modulus of sand. Quantity of air appears to be a function of the quantity of No.30-No.50 sand. Effect of grading and quantity of sand on other properties of fresh and hardened concrete is noted.