Fluidity of hydraulic grouts for masonry strengthening

Miltiadou-Fezans, A; Tassios, TP

dc.contributor.author	Miltiadou-Fezans, A	en
dc.contributor.author	Tassios, TP	en
dc.date.accessioned	2014-03-01T11:46:59Z
dc.date.available	2014-03-01T11:46:59Z
dc.date.issued	2012	en
dc.identifier.issn	13595997	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/38048
dc.subject	Fluidity	en
dc.subject	Fluidity factor	en
dc.subject	Hydraulic grouts	en
dc.subject	Injectability	en
dc.subject	Marsh cone	en
dc.subject	Mixing method	en
dc.subject	Superplasticizer	en
dc.title	Fluidity of hydraulic grouts for masonry strengthening	en
heal.type	other	en
heal.identifier.primary	10.1617/s11527-012-9872-8	en
heal.identifier.secondary	http://dx.doi.org/10.1617/s11527-012-9872-8	en
heal.publicationDate	2012	en
heal.abstract	Design of hydraulic grouts for strengthening of masonry historical buildings seems to follow a rather empirical procedure, with all the related uncertainties, both in economical and efficiency terms. This paper is part of a broader attempt to establish a rational methodology for the design of such grouts, based on their discrete injectability characteristics, i.e. (i) penetrability, (ii) fluidity and (iii) stability. The first part of this holistic methodology proposing a procedure to be followed in order to make a first selection of suitable grain size distribution of solid materials of the grout to fulfill penetrability requirements was published elsewhere. The second part regarding the fluidity of the grouts is the subject of this paper. A new practical fluidity measurement is proposed (the fluidity factor test [FFT]); and a ""fluidity factor"" is defined. It is proved that the follow-up of this factor as a function of the water-to-solids ratio may reveal fundamental characteristics of the grout-composition under design. The influence of the mixing method and superplasticizer on grout's fluidity is also examined. The paper concludes with a case study to highlight the practical use of the proposed test. Furthermore, stability of the suspension against segregation or excessive bleeding should also be ensured since, otherwise, blockage may soon appear and the quality of the intervention could be severely affected. This matter is examined by the authors in a separate paper, where specific semi empirical formulae permitting a first selection of water content and percentage of ultrafine materials, useful for the design of a grout composition are proposed. © 2012 RILEM.	en
heal.journalName	Materials and Structures/Materiaux et Constructions	en
dc.identifier.doi	10.1617/s11527-012-9872-8	en
dc.identifier.spage	1	en
dc.identifier.epage	12	en