Title: Use of Silica Fume and Superplasticizers in Cement Grouts for Injection of Fine Cracks

Author(s): A. M. Paillere, M. Buil, A. Miltiadou, R. Guinez, and J. J. Serrano

Publication: Symposium Paper

Volume: 114

Issue:

Appears on pages(s): 1131-1158

Keywords: bleeding (concrete); cements; grout; grouting; injection; lime; plasticizers; repairs; silica fume; strength; viscosity; Materials Research

DOI: 10.14359/2589

Date: 5/1/1989

Abstract:
Hydraulic grouts have been used for a long time for injecting sufficiently large cracks or ducts in prestressed concrete structures. However, they cannot penetrate into narrow spaces, such as millimetric cracks, because of clogging. For some grading curves of cement, it is possible to obtain grouts injectable into narrow cracks. A thorough study of optimum gradings and penetrability characteristics of grouts obtained through the combination of cement and ultrafines (such as silica fume) has enabled the formation of hydraulic grouts for injection. Possessing properties similar to the original materials and being relatively economical to use, such grouts would be particularly useful for repairing masonry structures and concrete. Materials so developed can be used under certain conditions for prestressing steel ducts.