Durability of shotcrete for underground support– Review

Mar 30, 2019 · With regards to the exposure classes, the European Standard EN 14487-1 for sprayed concrete states that those specified for concrete in EN 206-1 are also valid for shotcrete with 2 exceptions: (i) the recommended minimum cement content in the mix is 300 kg/m 3, and (ii) the recommendation for minimum air content in concrete is not valid for

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Concrete / Masonry - Mixing & Placing Equipment Rentals

Concrete / Masonry - Mixing & Placing Equipment. Sunbelt Rentals offers a wide range of concrete mixing & placing equipment for rent. This includes: buggies, mixers, buckets, vibrators, rebar cutters, benders & tying. CONCRETE AND MASONRY. Battery Powered Saw.

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(PDF) 3D Concrete Printing: Machine and Mix Design

Several tests were conducted to find the optim al concrete mix The cement screw pump, or shotcrete pump, This article presents a review of the current solutions for the rheological

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Sprayed tunnel linings: a comparison between several

Jul 29, 2009 · The material investigated in this paper is a normal strength concrete used for temporary tunnel lining. The mix design of the material is summarized in Table 1.In order to ensure a fast hardening to the concrete a liquid silicate addition (Na 2 SiO 4; "waterglass") as set accelerator was applied to the pump diffuser.The silicate content was nominally equal to the 12% of the cement weight.

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AL-302 (Telescoping Spraying Pump) > KING Shotcrete Solutions

The Aliva AL-302 machine is a telescoping spraying pump that is comprised of a hydraulically-driven, remote spray-arm. This machine is ideal for mining, tunneling and slope stabilization. The Aliva AL-302 can be mounted on a piece of existing mobile equipment, such as a forklift or articulated carrier. Alternatively, the spray-arm can be fixed to a loader bucket or another piece of equipment

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AL-264 (Concrete Spraying Machine) > KING Shotcrete Solutions

The Aliva AL-264 is an easy, safe, maximum output, concrete spraying machine. This machine represents the development of a new generation of rotor machines for shotcrete applications. The primary characteristics are its ease of operation, maximum output and the safety of the machine operator. Thanks to the newly developed HPO system, the hopper can be opened with little use of force.

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pre dampening nozzle ce refractory gunite shotcrete

LZ-5ER refractory shotcrete machine is a big size and specifically designed for spraying refractory materials,refractory shotcrete machine for for lining kilns, boilers, furnaces. … LZ-5ER Refractory Gunite Machine can be used for refractory spraying applications, as well as for concrete shotcrete application. … Pre-dampening Shotcrete Nozzle.

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Technical Questions and Answers Archive - American

Shotcrete placement conveys concrete materials through a delivery line that ranges from 11⁄2 in. (38 mm) to 21⁄2 in. (64 mm) in diameter. A 2 in. (50 mm) diameter at the nozzle is most common. Wet-mix shotcrete pumps wet concrete through the line.

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shotcrete pump for spray refractory materials

Concrete pumps - Sika. The powerful compact double piston pump with S transfer tube for shotcrete and for concrete delivery. With the Aliva-272 the delivery rate and the dosage of the accelerator can be continuously adjusted at the control unit or via remote control.

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driving type concrete spraying cement shotcrete gunite

KING SHOTCRETE EQUIPMENT CANADIAN PARTS CATALOGUE

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Concrete / Masonry - Mixing & Placing Equipment Rentals

Concrete / Masonry - Mixing & Placing Equipment. Sunbelt Rentals offers a wide range of concrete mixing & placing equipment for rent. This includes: buggies, mixers, buckets, vibrators, rebar cutters, benders & tying. CONCRETE AND MASONRY. Battery Powered Saw.

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The durability of shotcrete in cold region tunnel: A

Oct 10, 2018 · 1. Introduction. Shotcrete is flexible, convenient, does not require the laying of templates, and helps to resist deformation in poor geological conditions or a collapse,,,,, and it is a popular material in tunnel engineering,,,, .In tunnel engineering, shotcrete is usually sprayed onto the surface of the surrounding rock to prevent oxidation and the deterioration of the surrounding

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THE EFFECT OF SPRAYING ON FIBER CONTENT AND …

AL-272 (Concrete Spraying Pump) > KING Shotcrete Solutions. The Aliva AL-272 is a powerful and compact double piston pump with an S tube for sprayed concrete as well as conveying of concrete. It comes with an integrated synchronized dosing unit for the accelerator.

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Brundage-Bone Concrete Pumping | The Contractor's Choice

Brundage-Bone Concrete Pumping is the leading concrete pumping company in the nation and we are looking for Concrete Pump Operators and Heavy Vehicle Mechanics to join our team. Our operators and mechanics work on the industry's latest pumps, vehicles, and other specialty equipment such as line pumps, telebelts, laser screeds, mini-placers

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Corrosion Protection - American Shotcrete Association

King Shotcrete Solutions Vice President Lihe (John) Zhang LZhang Consulting & Testing Ltd. annual World of Concrete Awards banquet to a 3-day Shotcrete Conven-tion to be held March 11-13, 2018, "Shotcrete, the method of spraying concrete onto a surface, is ideally suited

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AL-503 (Shotcrete Spraying System) > KING Shotcrete Solutions

The Aliva AL-503 is a shotcrete spraying system consisting of a mobile, robotic spray-arm, mounted on a track-driven carrier. The carrier is diesel-driven and the arm is powered by either an electric/hydraulic or an air-hydraulic, power pack. This machine's ease of mobility and ability to operate with only compressed air, makes the Aliva AL-503 the perfect choice for use in mines, tunnels

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ALIVA PRODUCT CATALOG

10 Concrete pumps / Liquid dosing units / Water booster pump / Spraying machines for refractory material 12 Manipulators 14 Concrete spraying nozzles 16 Modular shotcrete system 18 Systems for tunnel boring machines / Shotcrete system for vertical shafts 20 Mobile concrete spraying …

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Shotcrete Machines at Best Price in India

Sprayed concrete was used for the first time in 1914 and has been permanently developed and improved since then. The major breakthrough came with the development of the wet-spraying technique. Being a flexible, fast and economic construction method, it has replaced the traditional methods of lining tunnel profiles and become

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spray shotcrete walls tunnels swimming pools construction pump

SHOTCRETE. Concrete spraying or shotcrete involves use of concrete pumping and compressed air to spray a low slump fine aggregate concrete mix at high pressure which allows it to follow irregular sloping and vertical shapes. Some typical applications are: Swimming pools. Retaining walls. Earthquake strengthening. Water channels and scour

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About us - Sika

Brand launch of the Aliva-272 shotcrete pump: 2018: Start of sales of the new Aliva-201, shotcrete unit for pressure silo and cooperation with pressure silo manufacturer and rental company. 2019: The Aliva-520 concrete spraying system was presented at Bauma in the electric version. 2020

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