Concept of Shotcrete Technology

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A
Technical Seminar Report
On
CONCEPTS OF SHOTCRETE TECHNOLOGY
In the partial fulfillment for the award of degree
Of
Bachelor of technology
In
Civil Engineering
By
SUKANTA MANNA (095Q1A0133)
SUBMITTED TO

DEPARTMENT OF CIVIL ENGNEERING
ANASUYA DEVI INSTITUTE OF TECHNOLOGY & SCIENCES
(Approved by AICTE and Affiliated to JNTU)
GUDUR (V), BIBINAGAR (M), NALGONDA (Dist).
ANASUYA DEVI INSTITUTE OF TECHNOLOGY & SCIENCES
GUDUR (V), BIBINAGAR (M), NALGONDA (Dist).
DEPARTMENT OF CIVIL ENGINEERING

CERTIFICATE
This is to certify that this Project Work entitled “CONCEPTS OF SHOTCRETE TECHNOLOGY” is a bonafide work carried out by Mr. Sukanta Manna (095Q1A0133) in partial fulfillment of the requirements for the award of the degree of Bachelor of Technology from JNTU, Hyderabad during the period 2012-13 under our guidance and supervision.

Internal Guide HOD Principal
Mr. Ashish Mr. Ram babu Mr. Mohan Raju

ABSTRACT

Shotcrete is the sprayed concrete, which was first used in Pennsylvania, USA in 1907 by Dr.Aneley. The technology is improving giving us enhanced comforts and the task is completed with a greater economy in terms of both time and investment. This innovative technology of shotcrete was introduced to make the work easier and immediate where any alterations are to be made or any architectural effects are to be enhanced.

Shortcreting has proved to be the best method for construction of curved surfaces. Domes are now much easier to construct with the advent of shotcrete technology. Tunnel linings are also becoming easy with this technology. Not only are these but there a wide range of applications where this technology has been a leading one. This technical paper includes the concept of shotcrete and how it differs from conventional concrete. It also enumerates the different types of process involved in shotcreting i.e. dry mix process and wet mix process. Advantages of shotcrete and its applications in various fields like tunneling, canals, buildings etc. are specified in detail. This paper presents an overview of shotcreteing technology along with its applications.

INTRODUCTION

Shotcrete is an excellent technology for stabilization and support of structures in a very quick time and for concrete application without using formwork. Shotcrete is also the interacting combination of human, equipment and materials. Shotcrete is a high-performance material which functions only as well as these “three components of success”. Man, personified in the work of the nozzle man, requires great technical skill and dedication to the job. The operator must be able to rely fully on the machine and the shotcrete material. It is the interaction and quality of these components that finally determines the success of the shotcrete application. In times of rapidly increasing mobility and limited space, the need for underground infrastructure continues to increase. Shotcrete has an important role in these requirements. This method is economically outstanding and almost unlimited technically, making it obvious answer. Shotcrete is a single technical term that covers different components of a complete construction technology: * The sprayed concreting process

* The material shotcrete
* The shotcrete system
These three components define a complete technology which has a long tradition, huge potential for innovation and a great future. The material shotcrete is a concrete mix design that is determined by the the requirements of the application and the specified parameters. As a rule, this means a reduction in the maximum aggregate grading to 8mm or maximum 16mm, an increase in the binder content and the use of special shotcrete additive (accelerator) to control the properties of the material. Shotcrete was used for the first time in...
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