Bleeding and bleeding measurement of cement-based grout
2012 (English)In: Grouting and deep mixing 2012: Proceedings of the Fourth International Conference on Grouting and Deep Mixing, February 15-18, 2012, New Orleans, Louisiana, American Society of Civil Engineers (ASCE), 2012, no 228 GSP, 1681-1690 p.Conference paper (Refereed)
Grouting is a common method of sealing rock in various geotechnical projects, and the bleeding of cement-based grout is an often-discussed issue. Current cylinder measuring methods for the estimation of the bleeding of cement-based grouts originate from the measurement of the bleeding of cement pastes used in ordinary building practices. Whether bleeding measured with these methods is relevant to bleeding in small fractures in rocks is one of the main questions in this study. This study showed that the bleeding process is very complex and is governed by different physical and chemical processes like sedimentation, consolidation, flocculation and hydration. It also showed that consolidation has little influence on bleeding in fractures. Bleeding in fractures is mainly the result of sedimentation. In addition, the study showed that the results measured using cylinder methods are not relevant for the bleeding of grout in fractures and that voids in the fractures caused by bleeding can be refilled during grouting. The bleeding should occur to a considerably lower extent in rock fractures, if it occurs at all.
Place, publisher, year, edition, pages
American Society of Civil Engineers (ASCE), 2012. no 228 GSP, 1681-1690 p.
, Geotechnical Special Publication, ISSN 0895-0563 ; 228
Building practices, Cement paste, Cement-based, Chemical process, Geotechnical, Measuring method, Rock fractures
IdentifiersURN: urn:nbn:se:kth:diva-144746DOI: 10.1061/9780784412350.0143ScopusID: 2-s2.0-84888367912ISBN: 978-078441235-0OAI: oai:DiVA.org:kth-144746DiVA: diva2:716733
4th International Conference on Grouting and Deep Mixing 2012; New Orleans, LA; United States; 15 February 2012 through 18 February 2012
QC 201405122014-05-122014-04-292014-05-12Bibliographically approved