4 Pumpable concrete | Concrete pumping and spraying

Slump testing is not considered to be a reliable measure of workability for the flowing concrete produced for pumping, as a slump test would produce a 'collapse' result. The practical pump-hire operators maintain that as a guide for the initial load of concrete, a flow reading of between 600 and 650 mm will ensure that the material will be

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Assessing the pumpability of concrete with the slump and

8 ESSENTIAL QUALITY REQUIREMENTS OF PUMPED CONCRETE - Civil…

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Influence of Pumping on Fresh Concrete Properties for SCC

Pumpability of Self Consolidating Concrete Slump Flow Time-- F1 F2 F3 2 4 6 8 10 12 14 16 18 t 50 [s] Truck No. CEMIaboveground CEMIunderground CEMIIaboveground CEMIIunderground Self Compacting Concrete Underground ; Dahlhaus, Bier et. al, Ibausil, 2006

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Concrete pump truck in Gauteng | Gumtree Classifieds in

Find concrete pump truck in Gauteng! View Gumtree Free Online Classified Ads for concrete pump truck and more in Gauteng. one more thing. Putzmeister concrete pump truck for sale. R 480,000 Are you looking for a nice small truck mounted concrete pump. We are selling on behalf of the owner a Putzmeister 16m concrete pump truck in full

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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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Workability assessment for polystyrene aggregate concrete

Workability assessment for polystyrene aggregate concrete Ben Sabaa and R.Sri Ravindrarajah 7/8 Table 3.2: Characterisation of workability for polystyrene aggregate concrete Apparent DIN:1048 Compaction Slump workability Compaction index Index (measured) (mm) very low > 1.45 1.41 - 1.52 - low 1.26 - 1.45 1.30 - 1.40 less than 10 medium 1.11 - 1

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Used Concrete Pump Truck for sale. Schwing equipment

CONCRETE PUMP MACK 1991 - SCHWING 32 MTS. Manufacturer: Schwing. - 1991 MACK TRUCK - MODEL MR600 - ENGINE E7300 - SCHWING PUMP - MODEL KVM32XL - 32 …

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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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What Are We Going to Pump That With? - concrete.org

Pumpable Concrete • Prime w/ grout to create boundary layer • Adequate Concrete Paste to suspend aggregate • Normal Weight Aggregate • Consistent grading • Max size is 1/3 Diameter of pipe I.D. • Shape, angular or rounded aggregate • Fine aggregates, natural are better than artificial • Pumpability is improved with decrease in

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Factors influencing the pumpability of unclassified

Apr 12, 2019 · Tailings consolidation and discharging technology is currently a popular means for disposing tailings in China. In this study, we describe a laboratory investigation of the unclassified tailings slurry from an iron mine and analyze the influence of the concentration, amount of consolidation agent, and types of consolidation agent on the pumpability in terms of the slump, slump flow, and

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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 test. The cohesiveness is the resistance to segregation and bleeding. In China this is only measured on request by the normal bleeding test; a time consuming test.

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concrete pump truck for sale south africa

Concrete Pump Truck for sale in South Africa. Concrete Pump Truck View details Mercedes Benz 22-25 Double Diff Concrete Pump Truck Used 1987 P.O.A Boksburg Gauteng Boschies Truck …

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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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Best Mix for Pumped Concrete | JLC Online

Mar 01, 2010 · Generally speaking, the maximum slump for a pumped mix is about 6 inches. The ideal concrete mix for pumping typically contains air-entraining agents, a little extra sand (compared with a standard concrete mix), often some fly ash, and a well-graded aggregate blend. To make the concrete easier to pump and place as it comes out of the hose, many

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(PDF) Low-volume wet-process sprayed concrete: pumping and

Relationship between slump and vane shear strength this to the cross-sectional area of the for fine concretes, including air entrainment reinforcement within the core; and concrete and this is plotted against slump 2. visually grading these cores on a scale in Figure 5(a).

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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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Fine 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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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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"Self Consolidating Concrete"

Slump flow & VSI assessment (ASTM C1611) Column segregation test (ASTM C1610) assessing the segregation resistance of SCC mixtures both • Faster concrete placement, easier pumpability • Ability to achieve full compaction in intricate

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What Are We Going to Pump That With? - concrete.org

Pumpable Concrete • Prime w/ grout to create boundary layer • Adequate Concrete Paste to suspend aggregate • Normal Weight Aggregate • Consistent grading • Max size is 1/3 Diameter of pipe I.D. • Shape, angular or rounded aggregate • Fine aggregates, natural are better than artificial • Pumpability is improved with decrease in

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