Assessing the pumpability of concrete with the slump and
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Making Concrete Pumpable| Concrete Construction Magazine
Jan 28, 2020 · "The two main ingredients that make concrete pump are water and cement," Brown says, and while admixtures can increase pumpability, that will only happen if the supplier doesn't take out too much water and cement. "If you replace too much of that water and cement with a chemical, it may give the same slump, but it takes out pumpability.
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Predicting Pumpability and Shootability of Crushed
Nov 14, 2016 · This study aims to estimate the pumpability and shootability of wet-mix shotcrete (WMS) made with crushed aggregates and various admixtures such as silica fume, fly ash, ground granulated blast furnace slag (GGBFS), metakaolin, and steel fiber based on rheological properties. The IBB rheometer was employed as an apparatus to measure the rheological properties of freshly mixed …
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Research Article Estimating Concrete Workability Based on
ect the consistency, owability, pumpability, compactibility, and harshness of a concrete mix. Hence, an accurate prediction of this property is a practical need of construction engineers. is research proposes a machine learning model for
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Assessment and prediction of concrete flow and pumping
Mar 01, 2020 · Such characteristics as slump, slump flow, L-Box flow distance [,, ] or spread diameter can be related to concrete yield stress, and the flow time out of a V-funnel or flow time t 500 in a slump flow test correlates with plastic viscosity. However, when considering the pumping behaviour of modern concretes, such empirical tests can be applied
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for the Next Millennium - Concrete Construction
slump of concrete also decreases over time. H o w e v e r, to measure the time sensitivity o f slump, it must be measured at regular inter- ( m o b i l i t y, stability, cohesion, etc.) and technical assessment (pumpability, com-p a c t a b i l i t y, ease of placement). Scientific means may determine a more detailed
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Estimating Concrete Workability Based on Slump Test with
The pumpability of concrete can be described by the consistency and the cohesiveness of this mix. The consistency is the relative ability to flow and in China this is measured by the slump
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Successful Design of Wet-Mix Shotcrete
Misconception 4: Concrete slump dictates the rebound rate Fact 4: While slump does provide an indication of the ease of flow, rebound rate is determined using more complex rheological properties A leading (and misleading) myth contends that a low slump is ideal for reducing the rebound rate of shotcrete mixtures.
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[PDF] Assessing the pumpability of concrete with the slump
Self Consolidating Concrete (SCC) — What, why, & how
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PROPOSING A SIMPLE METHOD FOR ASSESSING CONCRETE …
1 PROPOSING A SIMPLE METHOD FOR ASSESSING CONCRETE PUMPABILITY Y. YAMADA1†, S. HASHIMOTO2 *, Y. EMOTO3 and H. HAZEHARA2 1Graduate School of Civil Engineering, Fukuoka University, Japan 2Assistant professor, Department of Civil Engineering, Fukuoka University, Japan 3Professor, Department of Civil Engineering, Fukuoka University, Japan ABSTRACT As a method for easily assessing concrete
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8 ESSENTIAL QUALITY REQUIREMENTS OF PUMPED CONCRETE
Mar 21, 2016 · Concrete should be sampled at both ends of the pumpline to determine what, if any, changes in the slump, air content, and other concrete properties occur during pumping. However, the quality of the concrete being placed in the structure can only be …
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Take-Test_-Quiz-3-20.pdf - Take Test Quiz 3 u2013 200502
Question 1 Water-cement ratio is one of the important specifications for concrete a. Pumpability b. Slump only c. Strength and workability d. Curing speed Concrete containing super-plasticiser in a mix tends to produce a. a concrete with good workability and poor cohesion b.
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PROPOSING A SIMPLE METHOD FOR ASSESSING CONCRETE …
1 PROPOSING A SIMPLE METHOD FOR ASSESSING CONCRETE PUMPABILITY Y. YAMADA1†, S. HASHIMOTO2 *, Y. EMOTO3 and H. HAZEHARA2 1Graduate School of Civil Engineering, Fukuoka University, Japan 2Assistant professor, Department of Civil Engineering, Fukuoka University, Japan 3Professor, Department of Civil Engineering, Fukuoka University, Japan ABSTRACT As a method for easily assessing concrete
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DESIGN AND APPLICATION OF A NEW RHEOMETER FOR …
clear correlation between the common concrete flow tests like the slump flow or shock table test and the pumpability of fresh concrete. This is also true for more modern test like the L-box test, the J-ring or the V-funnel test. Even with the most modern concrete rheometers the predicting of the maximum pressure or pump volume per hour is not
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Mix Design and Pumped Concrete - Civil Engineering Portal
The workability of pumped concrete in general have a average slump of between 50 mm and 100 mm. A concrete of less than 50 mm slumps are impractical for pumping, and slump above 125 mm should be avoided. In mixtures with high slump, the aggregate will segregate from the mortar and paste and may cause blocking in the pump lines.
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Predicting Pumpability and Shootability of Crushed
Nov 14, 2016 · This study aims to estimate the pumpability and shootability of wet-mix shotcrete (WMS) made with crushed aggregates and various admixtures such as silica fume, fly ash, ground granulated blast furnace slag (GGBFS), metakaolin, and steel fiber based on rheological properties. The IBB rheometer was employed as an apparatus to measure the rheological properties of freshly mixed …
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Cement Mixer | Concrete Mixer | Buying Guide
Our Recommendation for a Small Cement Mixer: · Mixes 275 pounds of mortar, stucco, grout or concrete / cement. · Very portable – It can break down into 3 components for transporting in a car or truck. · Lightweight design makes it easy to maneuver in any work environment. · Mixes 275 pounds of material every 5 minutes for fast production.
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2 5hp portable mini drum concrete mixer with gasoline
Portable Concrete Mixer 2 Cubic Yards Swivel 2DH-S Mix The 2DH-S portable swivel concrete mixer mixes 2 cubic yards of concrete in 15 minutes. The self mixing drum holds 2 yards (54 cu ft) while in transit and mixes 6 yards per hour . This mobile concrete mixer can be towed into very remote job sites where a concrete mixer truck cannot go.
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Assessing the pumpability of concrete with the slump and
Estimating Concrete Workability Based on Slump Test with
GET A QUOTEFine And Ultrafine Materials For Concrete Durability
(Fig. 3) In second experiment, water to binder ratio and admixture dosage were adjusted to achieve constant slump values of 180 to 200 mm. Compression strength test results were recorded at 1, 3, 7 and 28 days for both the mixes (Fig. 4). Results are represented in graphical manner as below: Fig. 3: Slump Readings with Micro Silica and UF Slag
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Research Article Estimating Concrete Workability Based on
ect the consistency, owability, pumpability, compactibility, and harshness of a concrete mix. Hence, an accurate prediction of this property is a practical need of construction engineers. is research proposes a machine learning model for
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