Tag Archives: shotcrete
Shotcrete Components
Shotcrete has been widely used for tunneling works and slope protection, it is also used for architectural purposes. There are two types of shotcrete application, the wet and dry process. Shotcrete is a concrete transported by means of air under...
Shotcrete Placing Methods
There are basically 2 single application methods for shotcrete placing.
1. Dry process
The dry mixture of shotcrete is conveyed inside a hose by air. Just before the end of the nozzle, water and accelerator will be added in the same time than...
Application of sprayed concrete or shotcrete
Uses of sprayed concrete (or shotcrete)
Over the past century, sprayed concrete has replaced the traditional methods of lining tunnel profiles and has become very important in stabilizing the excavated tunnel section. Sprayed concrete is a single...
Specification for Shotcrete in Tunnel Construction
This Specification describes the requirements for shotcrete lining in a tunnel project. Applied shortly after excavation, the shotcrete lining shall rapidly medigate any disintegration or detrimental loosing of the surrounding rock.
9 Questions Before Making Shotcrete Mix Design
Before making a mix design for shotcrete or sprayed concrete, it is needed to get sufficient information from the clients. Adequate support information will be resulted in technically and economically effect for the work. A proper mix design...
What is shotcrete?
Introduction to shotcrete or sprayed concrete
Shotcrete or gunite was invented by Mr. Carl Ethan Akeley (1864-1926) in 1910. For attractions of a park, this American Architect was mandated to realize in concrete the reproduction of a dinosaur....
Strength Development of Sprayed Concrete
Early strength development of sprayed concrete or shotcrete
Variable requirements for early strength development have to be met, depending largely on the point of use of the sprayed concrete or mortar. A distinction is made between:
• very...
Underground Construction Terms
Underground Constructions
Due to the different functions the underground construction have to be divided in the following constructions:
Shotcrete for Stabilisation and Lining
Stabilisation using shotcrete
Shotcrete is the perfect material for excavation stabilization. Its unique flexibility in the choice of application thickness, material formulation (fiber), output capacity, very early strength development (dry...
Shotcrete mix design and proportion
Aggregate
Aggregates for shotcrete my contain river sand, crushed sand and crushed stone with particle sizes up to 16mm, normally up to 9.5mm.
Here after is a typical and recommended gradation of combined aggregates for shotcrete that will...