Restoration masonry grouts

Details Restoration masonry grouts Restoration masonry grouts

C - Chemistry, Metallurgy

04

B

261/58

C04B 28/00 (2006.01) C04B 28/02 (2006.01) C04B 28/04 (2006.01) C04B 28/12 (2006.01)

Patent

CA 1335898

The invention concerns grout mixes especially for restoration of masonry. A grout mixture containing a flyash as a pozzolan may be formulated to produce a grout of a consistency such as to allow unpressurised grout through a crack 4.5 mm wide by 25 mm long in the direction of flow of the grout; and, in the set grout, negligible shrinkage, water vapour absorbability sufficient to permit around a 10% weight change; an initial set time of less than 24 hours; and a 90 day strength of between 2.5 and 15 mPA. Such a grout may be customized for compatability with the masonry to be restored and may so differ in strength from it as to set up desirable stresses.

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