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The Minimum Slump Required for Pumping Concrete

Recommendations for Pumping Self-Consolidating Concrete

• Maintain the concrete slump flow (Figure 2) between 600 mm and 700 mm (24 inches and 28 inches) at the exit of the pump hose, in order to promote proper consolidation. If the slump flow is below 600 mm (24 inches), the self-consolidating concrete may not be …

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Mix Design and Pumped Concrete - Civil Engineering Portal

Jan 15, 2018 · In case of a dry sample, slump will be in the range of 25-50 mm. But in case of a wet concrete, the slump may vary from 150-175 mm. So the value of slump is specifically mentioned along the mix design and thus it should be checked as per local location. Recommended slumps: Reinforced foundation walls and footings: a. Maximum Slump 75mm. b.

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What is the slump value for pouring the mass concrete with

Dec 01, 1989 · Unless otherwise permitted or specified, the concrete should be proportioned and produced to have a slump of 4 inches or less if it's to be consolidated by vibration. If it's consolidated any other way, the slump should be 5 inches or less.

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Quick Answer: Is Pumped Concrete Weaker 2 - SeniorCare2Share

What is the minimum slump for pumping concrete? The workability of pumped concrete, in general, has an average slump of between 50 mm and 100 mm. A concrete of less than 50 mm slump is impractical for pumping, and slump above 125 mm should be avoided.

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Mix Design for Pumpable Concrete | Materials | Concrete

(a) It should have minimum fine particles smaller than 0.25 mm in size (cement + fine aggre­gate), approximately 400 kg/m 3 of concrete for the max size of 32 mm of coarse aggregate. In case of very angular and flaky aggregate, the quantity of fine aggregate may be increased by 10%.

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CONCRETE 101

slump or too little, aggregates that a re too absorptive or perhaps too l a r ge for the pump or pipeline. Coarse aggregate For pumpable mixes, the maxi-mum size of coarse aggre g a t e should be limited to 33 percent of the minimum opening in either the pump or the pipeline. For we l l - …

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Maximum Permitted Slump When Slump - Concrete …

Slump is a measure of concrete consistency or fluidity. Consistency is the ability of freshly mixed concrete to flow. For given proportions of cement and aggregates (without admixtures), the higher the slump, the wetter the mix. Four-inch (4") slump is very common with normal weight concrete and is a good average slump for pumping.

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5 Essential Things You Need to Know When Ordering Premixed

May 27, 2019 · The required slump between 20mm to 120mm should also be specified to achieve the required concrete workability. The higher the slump, the more workable the concrete. A slump test is recommended to assess slump precisely, however final results can vary 20mm above or below the requested slump.

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Workability Requirements for Concrete in Bored Pile

The most popular measure of workability of concrete is slump test. It shall be conducted for each truck load. Following standard discussed below should be followed unless other requirements are posed measuring of slump during discharging concrete into pile shaft or …

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Concrete Q & A: Maximum versus Nominal Slump Requirements

Aug 01, 2004 · Section 3300 of the specifications for 4000 psi (27 MPa) air-entrained concrete indicates a 4-in.-maximum (100 mm) slump, but a note on the blueprints for a wall to be placed using 4000 psi (27 MPa) air-entrained concrete on the same project indicates a 4-in.-nominal (100 mm) slump. I know that a 4-in.-maximum slump means just that—a 4 in

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What is the slump required for pile concrete? - Quora

Answer (1 of 19): The concrete mixes and its proportions are usually selected depending on the placing conditions. As specified in is 456 for concreting for shallow sections and pavements the workability of concrete required is very low where compacting factor test is usually adopted to find the

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Concrete Pumping Guide - Radbournes

3. The minimum slump (wetness) that will pump is a 100 slump. Any concrete below that slump will not pump satisfactorily and will require water to be added which will dilute / weaken the strength of the concrete. 4. A level area of hard standing, with no overhead obstructions, on which to set up the pump. 5. Clear access to the pump for the

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Concrete Mix Ratio And Slump Value Of Concrete

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. The mixing water requirements vary from different maximum sizes …

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Testing Fresh Concrete at Point of Delivery

varying slump loss during pumping. This would provide for a slump higher than 4 in. at the point of delivery to obtain 4 in. slump at the end of the pumpline. Once the slump loss during pumping can be determined, acceptance or rejection of concrete based on slump can then be determined at the delivery point. For example, if a 1-1/2 in.

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The most popular small line concrete pump available today.

‡ Pumping distances shown are to be used as a guideline only. Maximum attainable distances, maximum aggregate size, and minimum slump are all dependent on the concrete mix design, pipeline diameter, and other jobsite conditions. Maximum output and distances cannot be achieved

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The Minimum Slump Required for Pumping Concrete | …

Adding Water to Concrete| Concrete Construction Magazine

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Structural Lightweight Concrete - ESCSI

with a slump that will enable the concrete to be placed and finished efficiently and economically. This slump should be specified. If the concrete will be placed by pumping (See Section 3.1), certain considerations such as prewetting of lightweight aggregates, use of admixtures, and minimum cement content may be necessary.

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Best Mix for Pumped Concrete | JLC Online

Aug 02, 2017 · The Minimum Slump Required for Pumping Concrete. August 2, 2017 Concrete pumping, PUMPING MIX CEMENT. Tuhin. Concrete work is very specific. We concrete work is not done well, when it is not done with precision and when it is not properly researched, things tend to go very bad. Each and every last one of us have seen bad concrete work.

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Maximum Permitted Slump When Slump - Concrete Construction

Dec 01, 1989 · In the specifications there is reference to ACI 301, "Specifications for Structural Concrete for Buildings," and to ASTM C 143, Standard Test Method for Slump of Hydraulic Cement Concrete. The test method tells how to run the slump test but doesn't tell …

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Understanding Wet-Mix Shotcrete: Mix Design

slump at the pump, the plasticizer content should be reduced so as to produce a 25 to 50 mm (1 to 2 in.) slump. The air-entraining admixture is then incorporated to produce the slump required for pumping, typically between 75 and 150 mm (3 to 6 in.). Remember that the slump killing effect works best if there is a high initial air content at

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