Title: Comparison between Slag- and Silica Fume-Modified Grouts

Author(s): Marita L. Allan and Lawrence E. Kukacka

Publication: Materials Journal

Volume: 93

Issue: 6

Appears on pages(s): 559-568

Keywords: blast furnace slag; grout; microcracking; permeability; rheo-logical properties; silica fume; strength; superplasticizers.

DOI: 10.14359/9862

Date: 11/1/1996

Abstract:
The effects of silica fume and ground granulated blast furnace slag on rheol-ogy and hardened properties of superplasticized grouts were studied. Silica fume and slag improved impermeability, strength, and wet-dry durability of grouts. The physical and mechanical properties of slag- and silica fume-modified grouts compared favorably with those of grouts prepared with Type II and V cements. Silica fume was found to have a more pronounced impact on shear stress-shear rate relationships than slag. Gel strength was decreased by slag and increased by silica fume. The rheological properties of the grouts were sensitive to the sequence of superplasticizer addition. Slag-and silica fume-modijed grouts are suitable for use in structural and envi-ronmental applications.