Prediction of thermal conductivity and damage in Indian Jalore granite for design of underground research laboratory

2021 ◽  
Author(s):  
A. K. Verma ◽  
Manish Kumar Jha ◽  
P. K. Gautam ◽  
Arun Kumar Mishra ◽  
Harsh Vardhan ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Research Laboratory ◽  
Underground Research Laboratory

Low Alkaline Cement Used in the Construction of a Gallery in the Horonobe Underground Research Laboratory

2010 ◽  
Author(s):  
Masashi Nakayama ◽  
Haruo Sato ◽  
Yutaka Sugita ◽  
Seiji Ito ◽  
Masashi Minamide ◽  
...  
Keyword(s):  
Fly Ash ◽  
Research Laboratory ◽  
Concrete Lining ◽  
Energy Agency ◽  
Tunnel Support ◽  
Long Term Stability ◽  
Alkaline Conditions ◽  
High Level ◽  
Underground Research Laboratory

In Japan, any high level radioactive waste (HLW) repository is to be constructed at over 300 m depth below surface. Tunnel support is used for safety during the construction and operation, and shotcrete and concrete lining are used as the tunnel support. Concrete is a composite material comprised of aggregate, cement and various admixtures. Low alkaline cement has been developed for the long term stability of the barrier systems whose performance could be negatively affected by highly alkaline conditions arising due to cement used in a repository. Japan Atomic Energy Agency (JAEA) has developed a low alkaline cement, named as HFSC (Highly Fly-ash Contained Silicafume Cement), containing over 60 wt% of silica-fume (SF) and fly-ash (FA). HFSC was used experimentally as the shotcrete material in construction of part of the 140m deep gallery in the Horonobe Underground Research Laboratory (URL). The objective of this experiment was to assess the performance of HFSC shotcrete in terms of mechanics, workability, durability, and so on. HFSC used in this experiment is composed of 40 wt% OPC (Ordinary Portland Cement), 20 wt% SF, and 40 wt% FA. This composition was determined based on mechanical testing of various mixes of the above components. Because of the low OPC content, the strength of HFSC tends to be lower than that of OPC. The total length of tunnel using HFSC shotcrete is about 73 m and about 500 m3 of HFSC was used. The workability of HFSC shotcrete was confirmed in this experimental construction.

scholarly journals Potential of a "Digital Twin" Technology for the Purposes of Research in the Nizhnekanskiy Rock Mass Underground Research Laboratory

2020 ◽  
Vol 11 (2) ◽  
pp. 99-108
Author(s):  
V. V. Kononov ◽  
◽  
V. L. Tikhonovsky ◽  
S. S. Guralev ◽  
I. A. Bychkova ◽  
...  
Keyword(s):  
Rock Mass ◽  
Research Laboratory ◽  
Digital Technologies ◽  
Research Facility ◽  
Industrial Facilities ◽  
Digital Twin ◽  
Large Complex ◽  
Underground Research Laboratory ◽  
Key Aspects

The paper highlights key aspects associated with the introduction of advanced digital technologies under the development of large complex industrial facilities. It considers the applicability of a "digital twin" technology in the development of an underground research facility in the Niznekanskiy massif (Krasnoyarsk territory) (URF NKM).

Sign in / Sign up

Export Citation Format

Share Document