Results 211 to 220 of about 7,894 (259)

Air Entraining Admixtures

1990
While the early history of the use of air entraining admixtures is ambiguous, the author has heard, but not read, that the early Romans and Greeks added them to their pozzolanic mixes to increase their workability. Probably blood or animal fat was used for this purpose. Before proceeding further with the evolution of this class of admixtures, it should
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Entrainment of fibers from air filters

Environmental Research, 1980
Abstract This paper reports the results of a study in which the entrainment of man-made mineral fibers from commercially used modular filters was measured. The tests were performed on 42 modular filters representative of the most frequently used medium-efficiency air cleaning units which service health care facilities, banks, and general office ...
N A, Esmen, D, Whittier, R A, Kahn, T C, Lee, M, Sheehan, N, Kotsko   +5 more
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Air entrainment on a moving continuous web

Chemical Engineering Science, 2004
Abstract The air boundary layer on a moving continuous web was experimentally investigated in a laboratory coating equipment. The boundary layer thickness was obtained by smoke visualization and measured by image analysis in the range 2.4×10 4 Re 5 . According to the web speed, three laminar flow mechanisms were observed, for which the air boundary
A. Arzate, P.A. Tanguy
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Air Entrainment

2014
M. Pigeon, R. Pleau
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A multi-scale experiment analysis of air entrainment and heat exhaust coefficient under lateral smoke exhaust in tunnel fires

Tunnelling and Underground Space Technology, 2023
Haowen Tao, Chuangang Fan, Jia Ming Zhao   +2 more
exaly  

Using stirring power curves to investigate the air-entrainment and mechanical properties of cement mortar at low air pressure

Construction and Building Materials, 2023
Hussaini Abdullahi Umar, Xuli Lan
exaly  

Air Entrainment in Chute and Tunnel Spillways [PDF]

, 1992
In supercritical open channel flows air is entrained at the free surface. This process is called self-aeration. A method to estimate the flow properties is presented. New results on drag reduction in self-aerated flows are developed. It is shown that the mechanisms of drag reduction are associated with the presence of an air concentration boundary ...
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Air Entrainment

2007
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Experimental investigation of air entrainment by vertical plunging liquid jet

Chemical Engineering Science, 2018
Takashi Hibiki, Shuichiro Miwa
exaly  

Air-Entrained Concrete

2009
DG Daniel, CL Lobo
openaire   +1 more source