Results 21 to 30 of about 16,972 (255)

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

open access: yesНедвижимость: 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   +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]

open access: yes, 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 effects of nozzle diameter and length on the resulting strand properties for shotcrete 3D printing

open access: yesMaterials 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   +3 more
semanticscholar   +1 more source

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

open access: yes, 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   +43 more
core   +1 more source

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

open access: yesFrontiers 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   +13 more
semanticscholar   +1 more source

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

open access: yes, 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   +4 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]

open access: yes, 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

Sustainable shotcrete production with waste glass aggregates

open access: yesSN Applied Sciences, 2022
Article highlights This study investigates sand replacement with glass aggregates in shotcrete production for use in excavation industry. Tested shotcrete mixes containing glass aggregates exhibited a similar or higher strength properties at both early ...
Mehdi Serati   +4 more
doaj   +1 more source

Evaluation of shear behaviour of masonry walls strengthened by FRP laminates and shotcrete [PDF]

open access: yesJournal of Structural and Construction Engineering, 2019
Extensive damages in a large number of existing buildings under in-plane shear has shown the need of structural strengthening techniques for masonry structures.
mohsen izadinia, rahmatollah pourjaafary
doaj   +1 more source

An Optimization Method for Mix Proportion of Wet-Mix Shotcrete: Combining Artificial Neural Network with Particle Swarm Optimization

open access: yesApplied Sciences, 2022
Wet-mix shotcrete has been widely used to support roadways during the excavation of underground mining. In practice, the mix proportion of wet-mix shotcrete plays a key role in later successful application.
Bin Han   +4 more
doaj   +1 more source

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