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The total air-void content (of voids larger than capillary size) of an ... In hardened concrete, the air-void system may be characterized by one of two ...
Learn MoreWhen you pump air entrained concrete one of three ... What Do You Want in an Air-Void System? ... Vacuum. 3. Impact. Why does pumping impact air? Mechanisms ...
Learn MoreRequest PDF | Concrete pumping and its effect on the air void system | Pumping is the most utilized concrete placement technique on construction sites ...
Learn More:WEDDJ Janssen · 1994 — purpose of this work was to verify previously identified changes in the air-void system, and to examine the effect of pressure on concrete mixes containing ...
Learn More:J Becker · 2018 — This work investigates how pumping affects the air void system in the fresh and hardened concrete. This work pumped a similar mixture design ...
Learn Moreand the lubrication layer, (3) asses the effect of pumping and pumping pressure on concrete fresh properties and the air void system under controlled ...
Learn Moreconcrete when placed by pumping and to suggest best type of aggregate and air entraining admixture. b). To detail the pumping effects on air void system.
Learn More:J Vosahlik · 2018 · :11 — With the discharge from the pipeline, the pumped concrete mixture will inevitably experience a sudden decrease in velocity. It was hypothesized ...
Learn More:M Jolin · 2009 · :60 — An Investigation of Concrete Pumping Pressure and the. Effects of Pressure on the Air-Void System of Concrete, Master Thesis,. University of Washington, 223 ...
Learn MoreIn many cases, the quality of the air void system in the fresh concrete would predict the concrete would have poor performance in freeze-thaw testing; however, ...
Learn More:KC Hover · 1996 · :38 — Air content and air-void system parameters of the hardened concrete were determined in accordance with ... Concrete Pumping Effects on Entrained Air Voids.
Learn MoreIt is normal to find a loss of about 0.5 to 1.0 percent air as concrete is ... of Concrete Pumping Pressure and the Effects on the Air Void System of ...
Learn More:S Talukdar · 2019 · :5 — Once concrete has set, the casts of the original air bubbles remain in the hardened concrete as voids. They are commonly referred to as the "air-void system" in ...
Learn Morevoids. This is commonly referred to as the "air-void system" in hardened concrete. ... pumping pressure as ... effect on its air content and entrained.
Learn More:KP Jang · 2018 · :13 — An investigation of concrete pumping pressure and the effects of pressure on the air-void system of concrete (Master Thesis).
Learn Morelow air or high SAM Number after pumping. • It appears that sampling the concrete prior to pumping is a good indicator of the air void system in the.
Learn More:G De Schutter · 2016 · :47 — Keywords:Pumping; Concrete; Rheology; Lubrication layer; Pressure ... spacing factor of the air-void system is reported [36-38].
Learn Morepumps at the point of placement in the concrete struc- ture. In some cases it is observed ... and the Effects on the Air Void System of Concrete," Master's.
Learn More2018726 — Exciting new research for the concrete pumping industry finds air void loss after pumping to be a temporary condition.
Learn More:PE Tyler Ley · :1 — The study examines the effects of different air contents, pumping time, and pressure has on the air volume and the stability of the air void system.
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