Assessing the pumpability of concrete with the slump and Related Information

UNDERSTANDING THE PUMPABILITY OF CONCRETE

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

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 …

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

Estimating Concrete Workability Based on Slump Test with

8 ESSENTIAL QUALITY REQUIREMENTS OF PUMPED CONCRETE - Civil…

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.

Correlating rheological properties to the pumpability and

Pumpability of fresh concrete meant that the concrete mixtures could flow in pipes without blockage [57][58] [59]; Shootability was regarded as the ability of fresh concrete to be sprayed with

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.

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

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

[PDF] Assessing the pumpability of concrete with the slump

Self Consolidating Concrete (SCC) — What, why, & how

After mixing concrete, at what time is the period slump

Answer (1 of 5): After mixing concrete, at what time is the period slump test carried out? The slump test is used to determine if the concrete meets the slump requirement set forth in the specifications or by the project engineer. This test is done immediately prior to beginning the pour, since d

WRD HANDBOOK CHAPTER NO. 3 SELF COMPACTING …

4.16 Pumpability 10 4.17 Robustness 10 4.18 Rheology 10 4.19 Segregation resistance 10 4.20 Slump-flow 10 4.21 Slump flow test 10 4.22 Slump flow T 500 (T20) 10 4.23 Stability 10 4.24 Thixotropy 10 4.25 Thixotropic behavior 10 1 Preferred Test Methods for Assessing Characteristics of a SCC 20

State of the Art on Prediction of Concrete Pumping

on qualitative assessment of concrete pumpability based on the slump test or the slump flow test. However, for major construction sites requiring long-distance transport of con-crete, such as high-rise buildings, long-span bridges, long-distance tunnels and others, priori prediction of concrete pumpabilitygrowinginimportance

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

Influence on the pumpability of concrete and its

Spread or slump is not useful to evaluate pumpability anymore Little changes in mix design can have a large effect on pumpabiltiy For developing new mix designs the pumpability can be shown for a lot of concrete mixes in laboratory by SLIPER Only to play safe in very special cases make a pumping test SLI DING PIP ERHEOMETER by K. Kasten

Self-compacting concrete: New Zealand experience 2000 – …

Workability of concrete is a very broad term, which is related to consistency, placeability, pumpability and stability. The most common way to characterise workability of normal concrete is slump value. By definition, SCC is a high-performance concrete that flows into place and around obstructions under

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

Workability Tests - Tarantula Curve

The Slump Test. While the Slump Test has been widely used as a specification to evaluate workability, it has been commonly believed to be inadequate at measuring the workability of concrete in the field. Shilstone had this to say about the Slump Test, "The highly regarded slump test should be recognized for what it is: a measure of the

Assessing the Pumpability of Concrete

Estimating Concrete Workability Based on Slump Test with

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