Abstract Grout is a material usually applied to enhance the mechanical properties of structural masonry. As such, demand for grout has been growing parallel Without guidelines mixing design, these products are often prepared on-site based on same concepts used preparing ordinary Portland cement-based concretes. Several still need be investigated and understood due this mixing-design approach, c...

Excessive deformation of tunnel lining structures can be identified as a common problem in Eastern China soft ground. Grouting treatment is an effective and method to actively mitigate excessive cross-sectional rings soils. However, grouting operations would introduce localized heavy disturbance the surrounding ground around nozzles, causing large-deformational soil movement. The occurrence lar...

Experimental, numerical, and theoretical analyses were conducted of the axial load resistance a novel ultrahigh-performance fiber-reinforced concrete (UHPFRC) grouted square hollow section (SHS) tube sleeve connection. The experimental study tested 10 full-scale specimens with varying shear key spacings, grout thicknesses, lengths, volume proportions steel fiber in UHPFRC. Two types failure mod...

In the past thirty years many mining projects in Chile and Peru have used: (i) polymeric geomembranes (ii) design-and-build cutoff trenches, plastic concrete slurry walls, grout curtain systems to control seepage at tailings storage facilities (TSFs). Geosynthetics are a viable alternative TSF dam for clay cores or impermeable materials, mainly because of their marked advantages cost, installat...

Abstract Rock anchors are used to stabilise large scale infrastructures. Failure of rock could threaten the stability and lead severe economic social consequences. The design is based on four principal failure modes, which breakage steel tendon, tendon-grout interface failure, grout-rock mass around anchor. current dimensioning methods uncertain due limited knowledge bond strength failure. meth...

Some specimens reproducing three leaf stone masonry walls frequently used in Italy, have been built at DIS, Milan, using two different types of stones and tested under compression and shear, up to failure. Subsequently the damaged wallettes were repaired by injection and the effectiveness of the injection was controlled by several NDT (non destructive techniques)

This paper proposes a novel spiral-double ground heat exchanger (GHX) that decreases conventional construction costs, facilitates installation, promotes transfer, and reduces thermal resistance. In this study, new effective installation procedure was proposed. Three-dimensional, transient, conjugated finite volume simulations were conducted to compare the thermo-hydraulic performance of traditi...