Experimental Study of Elastic Waves in Concrete for NDE in Civil Engineering

2005 ◽  
Author(s):  
B. Köhler
Keyword(s):  
Experimental Study ◽  
Elastic Waves ◽  
Civil Engineering

Experimental Study on Fire Resistant of Shield Tunnel Segment in Civil Engineering

2012 ◽  
Vol 568 ◽  
pp. 7-12
Author(s):  
Xin Jun Guo ◽  
Zhi Sheng Xu ◽  
Yan Zhang
Keyword(s):  
Experimental Study ◽  
Temperature Distribution ◽  
Bearing Capacity ◽  
Civil Engineering ◽  
Shield Tunnel ◽  
Temperature Position

Fire resistant behavior is one the main properties of shield tunnel segment in civil engineering. The main objective is to study the regularity of temperature distribution and deflection of shield tunnel segment after fire and the residual bearing capacity after cooling in this paper. According to the tests, a temperature-position fitting curve can be obtained, and it can be obtained that the damaged depth of segment is 7.8cm while heating in RABT curve for 125min. It is found that the residual bearing capacity of segment decrease with the increase of the pre-load, which drops rapidly for it is only about 20% compared to the reference one.

scholarly journals METHOD FOR PRIMARY PROCESSING OF HERE SILKWORM COCOONS BY USING INFRARED RADIATION AND ELASTIC WAVES

2019 ◽  
Vol 2018 (3) ◽  
pp. 30-36
Author(s):  
J Safarov ◽  
◽  
Sh Sultanova ◽  
D Samandarov
Keyword(s):  
Experimental Study ◽  
Experimental Work ◽  
Elastic Waves ◽  
Initial Moisture Content ◽  
Summer Season ◽  
Processing Method ◽  
Full Scale Test ◽  
State Technical ◽  
Primary Processing ◽  
Scale Test

The article discusses the results of an experimental study of the primary processing of silkworm cocoons. In the laboratory of the department of Tashkent State Technical University a full-scale test was carried out for the primary processing of silkworm cocoons. Experimental work was carried out to pacify and dry the living cocoons of the silkworm of the duragay cultivar “MusaffoTola” grown during the summer season. Studies were carried out to determine parameters such as temperature and time of the primary processing of the silkworm in 5- fold repetition.The initial moisture content of live silkworm cocoons was 36–40%. According to the results of laboratory - experimental work, the appearance of mold was observed in 25-30% of processed cocoons of the silkworm, at 55-60 °C in 10 days a butterfly formed in 15-20% of the cocoons. The processed cocoons of the silkworm at a temperature of 75-85 °C deteriorated due to the release of liquid.It was revealed during observations that silkworm cocoons processed in the temperature range 65-70 °С using vibration waves were euthanized within 30 minutes and the cocoons were dried to 10-12% humidity within 10 days at a temperature of 38-42 °С. The use of elastic waves in the processing of cocoons proceeded 5-10% lower compared to the processing method using vibrational waves.

Experimental Study on an Ultrasonic Purification Apparatus for Civil Engineering Use

2008 ◽  
Vol 47 (5) ◽  
pp. 4296-4299 ◽  
Author(s):  
Takafumi Yoshino ◽  
Daisuke Koyama ◽  
Kentaro Nakamura ◽  
Sadayuki Ueha ◽  
Katuhiro Seino
Keyword(s):  
Experimental Study ◽  
Civil Engineering
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