Results 21 to 30 of about 17,530 (271)

Filler Effect in Shotcrete [PDF]

Materials, 2019
The effects of fine limestone powder on the early hydration of cementitious systems accelerated by means of alkali-free aluminum sulfate based products, commonly used for shotcrete applications, were investigated in the course of laboratory and real scale tests.
Isabel Galan, Lukas Briendl, Maria Thumann, Florian Steindl, Rudolf Röck, Wolfgang Kusterle, Florian Mittermayr   +6 more
openaire   +2 more sources

LABORATORY TESTS ON THE STRENGTHENING OF WET-MIX SHOTCRETE LINING WITH THE USE OF NANOMATERIALS

Rudarsko-geološko-naftni Zbornik, 2021
Adding nanomaterials to concrete extends the size range of constituent particles well into nano-scale dimensions, which could help the compacting of particles in cement-based materials.
Hamid Kalhori, Raheb Bagherpour, Mohammad Amir Akhlaghi, Sayed Mohsen Mirdamadi, Mehdi Nasiri Sarvi   +4 more
doaj   +1 more source

Selecting a variant to allocate a plant producing shotcrete while implementing method of “wet” pneumatic concrete placing in Orlovskaia mine [PDF]

, 2019
Purpose. Mining and geological conditions are complicated due to the decreased level of mining within deposits of West Kazakhstan. It results in significant increase in the amount of metal framed support which cannot always provide safety of mine ...
Konurin, A, Krupnik, L, Shaposhnik, S, Shaposhnik, Yu, Shokarev, D   +4 more
core   +1 more source

Influence of Mix Proportions on Rheological Properties, Air Content of Wet Shotcrete—A Case Study

Applied Sciences, 2021
To study the influence of different mix proportions on the fresh properties of wet shotcrete, the rheological properties and air content of wet shotcrete with different admixtures before pumping were measured.
Jun Xie, Xiangfei Cui, Nan Guo, Guoming Liu   +3 more
doaj   +1 more source

Assessment of static and dynamic stresses horse-shoe tunnel with connecting gallery using finite element method: (as a case study) [PDF]

, 2018
This paper illustrates the use of MIDAS GTS NX to investigate the tunnel’s simulation in order to highlight the effect of static and dynamic load on the behaviour of tunnel to compare this response expressed in terms of displacement and stresses ...
Hrubešová, Eva, Mohammed, Jaafar
core   +1 more source

The effect of three-stage ionization on the structure formation of a concrete mixture during shotcrete

Недвижимость: экономика, управление, 2023
The article deals with the problem of reducing rebound and dust formation, as well as increasing the strength of shotcrete. It is known that with “dry” shotcrete, the rebound is especially significant, since the mixture does not have time to acquire ...
Valery Yakovlevich Mishchenko, Alexey Lvovich Semenov, Larisa Nikolaevna Titova, Dmitry Vladimirovich Loboda   +3 more
doaj   +1 more source

Influence of the Tunnel Shape on Shotcrete Lining Stresses [PDF]

, 2012
Tunnel excavation is frequently carried out in rock masses by the drill and blast method and the final shape of the tunnel boundary can be irregular due to overbreaks.
Adeli, AFTES, Barpi, Bianchini, Borio, Brown, BTS, Carranza-Torres, CETU, DAUB, Dubois, Goodman, Hellmich, Hoek, Hoek, Ibarra, ICE, Kalamaras, Lunardi, Mancini, Mancini, Mancini, Oreste, Panet, Peila, Sadeghi, Samant, Sarma, Sarma, Sarma, Scheiner, Schmitz, Schulz, Singh, Son, Stelzer, Tagherouit, Thomas, USACE, Wahlstrom, Wood, Wyllie, Zadeh, Zadeh   +43 more
core   +1 more source

Use of Rock Mass Rating (RMR) values for support designs of tunnels excavated in soft rocks without squeezing problem [PDF]

, 2019
Effect of the rock material strength on the RMR value and tunnel support designs were investigated within this study including site works, analytical and numerical analyses.
Demir, Serhat, Komurlu, Eren
core   +1 more source

The effects of nozzle diameter and length on the resulting strand properties for shotcrete 3D printing

Materials Structure, 2023
Additive manufacturing in construction (AMC) enables new design methods and strategies within the construction industry. In particular, Shotcrete 3D Printing (SC3DP) offers a high degree of design freedom by enabling the deposition of concrete at ...
Martin David, Niklas Freund, Klaus Dröder, D. Lowke   +3 more
semanticscholar   +1 more source

Robotic knitcrete: computational design and fabrication of a pedestrian bridge using robotic shotcrete on a 3D-Knitted formwork

Frontiers in Built Environment, 2023
The research project presented here aims to develop a design-informed manufacturing process for complex concrete shell structures in additive manufacturing and thus overcome limitations of traditional construction methods such as formwork- and labor ...
Philipp Rennen, Stefan Gantner, Gido Dielemans, Lazlo Bleker, Nikoletta Christidi, Robin Dörrie, M. Hojjat, Inka Mai, K. Mawas, D. Lowke, Pierluigi D’Acunto, K. Dörfler, N. Hack, Mariana Popescu   +13 more
semanticscholar   +1 more source