Filtration of cement-based grouts measured using a long slot
2014 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, Vol. 43, 101-112 p.Article in journal (Refereed) Published
Penetrability of cement-based grout is an important issue when sealing the rock around tunnels and measurement of this property of the grout is needed for designing the grouting process and the development of grout. This paper investigates plug-building or the filtration process in a long slot where a slot constriction is placed relatively far from both the "borehole" and the end of the slot. In this slot, a certain shear stress develops before and after a constriction, which may influence plug-building at the constriction. This method is also compared with short slot and penetrability meter. The smallest groutable fracture for all three measured grouts is reasonably close to 75 mu m. Measurements using the long slot showed better penetrability results compared to the short slot and the penetrability meter. The short slot is more practical and gives reasonably good results. The penetrability meter underestimates the penetrability of the grouts.
Place, publisher, year, edition, pages
2014. Vol. 43, 101-112 p.
Civil Engineering Geotechnical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-85726DOI: 10.1016/j.tust.2014.04.010ISI: 000342479500011ScopusID: 2-s2.0-84901032847OAI: oai:DiVA.org:kth-85726DiVA: diva2:500093
QC 201301142012-02-132012-02-132014-11-04Bibliographically approved