Pumping Air Entrained Concrete and the Super Air Meter
Air Entrainment Meters and Indicators - Humboldt Mfg
Jan 28, 2021 · This presentation will discuss changes in the volume of air entrained concrete in pumped concrete. The work shows that during pumping the air volume will decrease and if measured immediately after pumping will be lower than what is found in the final concrete. These findings are supported by hardened air void analysis, freeze thaw tests, and measurement of the air void volume and spacing over time in the fresh concrete with the Super Air Meter.
amount of air entraining agent, type and gradation of aggre g a t e, hard-ness of water, length and means of mixing, brand of cement, and con-c r ete tempera t u re ) . Air can be entrained in concre t e by either of two methods: the use of air entraining agents or of air en-t r aining cements. The former in-clude such products as natura l
These Type B pressure meters, also referred to as pressure air meters or air entrainment meters, measure entrained air in freshly mixed concrete in accordance with ASTM C231 and AASHTO T 152. Super Air Meter (SAM) is similar to a Type B meter, but with modifications. This cast aluminum device determines both air content and air void spacing factor in less than 10 minutes.
Air Entrained Concrete Additive | Fritz-Pak | Concrete
Air Plus and Air Minus are carried by the Technical Service Representative on TXI jobs for emergency use because they work well to bring concrete loads into compliance at jobsite. Fritz-Pak's prepackaged, powdered form is convenient. The bags are light and compact and unlike carrying liquids, there is no problem with spill control.
Air-Entraining Agent | Fritz-Pak Super Air Plus | Air
This air-entraining agent is specially formulated for jobs that require significant increases in the air content of the concrete. It may be used as a primary air-entrainer and is best used at a rate of 1 bag per load for corrections of 1-2%. Like our Air Plus admixture, Super Air Plus is compatible with all standard concrete admixtures. Packaging.
Concrete Air Meters | Air Testing Equipment - Gilson Co.
THE SAM MEASURES WHAT MATTERS ABOUT YOUR CONCRETE. Concrete needs the right bubble size in order to survive in freezing climates. The Super Air Meter (SAM) is a modified version of the typical pressure method and can measure the bubble size and volume in wet concrete in about 10 minutes. This ensures you are placing concrete that is freeze thaw durable with more consistent air volume.
Development of a Robust Field Technique to Quantify the
The method has been named the Super Air Meter or SAM. Results from the SAM are measured for over 50 concrete mixtures and then compared to hardened air void analysis and conventional measurements of fresh air content. In addition some data is presented from two different operators and two different devices to compare the repeatability of the
Update on the Super Air Meter - Iowa State University
Air-entrained concrete. Why Do We Add Air to Concrete? Super Air Meter (SAM) • We have modified a typical ASTM C 231 pressure meter so that it can hold larger pressures • We have replaced the typical gage with a digital one • The test takes 8 minutes with the hand pump and 3 minutes if you have compressed air available. restraint cage
Enhanced Entrained Air Void System Characterization for
1. Develop two alternative entrained air void system characterization and measuring techniques. 2. Compare alternative techniques to that of the current practice (ASTM C457) and Super Air Meter. 3. Correlate entrained air void system data to the fresh and hardened properties of highway concrete…
Entrained Air: Now You See It, Now You Don't | American
The H-2784 Super Air Meter (SAM) is a testing device that measures both the air void spacing and air volume of plastic (fresh) concrete in about 10 minutes. Air void spacing has been shown to be a better indicator of concrete freeze-thaw durability than total air content; however, until now, it has been challenging to measure in fresh concrete.
THE Super Air Meter. HMA Lab Supply. $ 3,175.00. Item #: CE-2000. S.A.M. - Just SUPER. Determine total air content & air void spacing in fresh concrete. Increased consistency in air entrained concrete. The end result SAM number correlates with increased freeze/thaw durability.
Aug 03, 2009 · The Roughneck hose was made to reduse the air loss, by keeping the pipes full to the end of the tip hose, in otherwords, the mud doesn't see a 'vacuum' condition. A steady pumping rate and a nice even stream of concrete coig out the hose goes a long way to controling lossof entrained air…
Air Entrainment for Concrete Testing - Humboldt Super Air
When Pumping Air-Entrained Concrete 1 of 3 Things Happen: Pumping Changes The Concrete Before the Pump After the Pump 6.1% Air 3.5% Air. Why Does Pumping Impact Air? 1. Pressure Super Air Meter (SAM) •AASHTO TP 118 •Measures vol. & bubble distribution •Modified pressure meter …
air void quality in the fresh concrete. This is especially useful to evaluate a concrete mixture before and after a paver, or a pump and for investigation of concrete mixtures with a number of admixtures. The meter has been validated with over 50 concrete mixtures with different air entraining agents, water reducers, w/cms, and cement contents.
Super Air Entrainment Meter acc. to Bottke - FORM+TEST
Super Air Entrainment Meter acc. to Bottke Leaflet - Super Air Entrainment Meter acc. to Bottke / L2050.01 for testing the air pore content of fresh concrete according to EN 12350-7, DIN 1048 Teil 1, ASTM C 231 - Typ B, BS 1881
thaw testing, and the Super Air Meter. This means that current specifications for testing air-entrained concrete after a pump should be modified. 1:45 The History of PCA's Design and Control of Concrete Mixtures Michelle Wilson, Portland Cement Association
Description. Used with Type B Air Meters, the Super Pump adds air to the sealed air chamber of an air entrainment meter. Once the initial pressure is reached, the air is released into the vessel containing the concrete and the percentage of entrained air can be determined. The Pump has a large, easy-grip handle and builds pressure quickly.
Concrete Air Meter (Type B) - Myers Concrete Testing Equipment
The type B concrete pressure air meter measures entrained air in normal weight fresh mixed concrete. The AR-B air meter is one of the most precise measuring devices available. Its heat-treated cast aluminum body makes the meter heavy duty yet lightweight. Due to large stainless steel clamp levers, the concrete air meter has a holding capacity