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2017-8-2 · 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.
Get Price2011-12-3 · A focus on slump alone is too simple: 1) slump could be changed by admixtures more than the pumpability is changed by them . 2) <2' (50mm) slump could be pumped up 90m if everything else is good. Better questions: Using largest diameter pipe (not hose) that makes sense? Volume output expectations not excessive?
Get PriceThe 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.
Get PriceStandards have been set to establish how to measure the slump of your concrete. A 12' cone is required to find the slump, as the measurements in any other standard would be inaccurate (this being your makeshift cone) and would result in poor concrete quality.
Get Price2014-10-9 · 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. Above average slump - due to the addition of water – considerably …
Get Price2021-7-30 · 3. Slump of concrete = 75 to 100 mm . Procedure: The proportions for 75-100 mm slump will be taken as given in table 20.52. From the table 20.52, Water = 190 kg or litres . Cement content =310 . Fine Aggregate = 880 . We know that total fines less than 0.25 mm for pumpable concrete should be 350 to 400 kg per cubic metre of concrete.
Get PriceThe pipe diameter should be 3.5 to 4 times greater than the maximum aggregate size in the concrete. This helps ensure that the pipeline will not become blocked. Another factor in mix design is the consitency (slump or flow test) of the concrete. A higher consistency will allow the concrete to move more readily within the pump and pipe-line.
Get Price2001-11-23 · The most common reason for slump loss from pumping is that the aggregates were not in a saturated, surface dry (SSD) condition when the concrete was batched. This results from lack of attention to the stockpile moisture as noted in ishvaaag's comments. Most coarse aggregates can absorb between about 1-1/2 and 5 percent moisture by weight.
Get PriceS1 slumps are most likely to be used for kerb and pipework bedding because it’s quite a dry concrete mix. This is sometimes referred to as “semi-dry”. S2 slumps are used for simple strip footings and cast in-situ hard-standing slabs or when using a wheel barrow to move the concrete.
Get Priceslump 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 - …
Get Price2014-10-9 · 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.
Get PriceConcrete slump values. There are five classes with each class spanning a range of slump values. Class Slump range (mm) Target slump; S1: 10-40: 20: S2: 50-90: 70: S3: 100-150: 130: Table 1: Slump class from BS8500: A rough guide to useage. S1 slumps are most likely to be used for kerb and pipework bedding because it’s quite a dry concrete mix ...
Get Price2021-7-30 · Design a mix for pumpable concrete from the following data: 1. The max. size of coarse aggregate = 20 mm. 2. The fine aggregate passes through the 300 micron or 0.3 mm = 19%. 3. Slump of concrete = 75 to 100 mm.
Get Price2018-2-13 · One of the critical tests to analyze the quality of concrete is the “Concrete Slump Test”. This test is conducted to establish the consistency of fresh concrete and to find out its flow. It is also critical in measuring the workability of the concrete and lets you know the composition of the mix. via concretetestingsolutions.
Get PriceChallenges Associated With Concrete Pumping: 1. The slump of the concrete should be within 50 mm to 100 mm. A slump of below 50 mm will be impossible and impractical to pump. A slump greater than 100 mm will increase the risk of segregation of the aggregates and will most likely cause blocking. 2.
Get PriceConcrete slump is labelled in terms of what class it falls into, ranging from S1 to S5, based on its average slump value – this is illustrated in the grid below. Concrete in class S1 is a relatively dry mix, and it gets more fluid the further up the classes you go.
Get Priceslump 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 - …
Get Price2019-5-27 · 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.
Get Priceplace concrete into above - g ra d e w a l l s . A small-line pump (either b a l l - va l v e or 1-inch-minus) or a boom pump can be used. Id e a l l y, a line pump should have a 2-inch-diameter hose, so it can run at full speed without danger of a form blowout. Although extra w o r kers are needed to maneuve r the pump line around the wall
Get Price2021-7-29 · What is Plum Concrete?. In mass concrete foundations, boulders of say 150 mm size up to 30% of the total quantity of concrete, are mixed in the wet concrete.This adds to economics and saves heat generation. Such concretes are called plum concretes.. After at least two layers of wet concrete is completed, well-shaped and thoroughly washed, angular rock pieces using a maximum size of not …
Get Price2015-12-1 · This paper describes the execution challenges faced during single stage pumping of concrete through 2.432 km. Pump and pipeline selection and installation, materials’ development, establishing of control points and controlling variations are discussed.Concrete responses to weather changes play a vital role in concreting and pumping methodology development.
Get Price2017-7-5 · The Concrete Slump Test is largely intended to check the Workability of the mix. What good does it do to test workability when only half the batch is left. The Minnesota DOT specifies that the Slump Test shall be taken after the first 1/3 of a yard has been discharged. Strength tests are to be taken in the middle of a batch.
Get PriceAIMIX Concrete Pumps For Sale in Kenya. Aimix has produced many kinds of concrete pumps in Kenya, including concrete trailer pump, boom concrete pump, concrete mixer pump, electric concrete pump, diesel concrete pump, mobile concrete pump, small concrete pump, portable concrete pump, stationary concrete pump etc.The following is an introduction of concrete pumping equipment that can help you ...
Get Price2018-1-15 · 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. Reinforced foundation walls and footings: a. Maximum Slump 75mm.
Get Price2021-6-16 · Testing concrete as discharged from the pump alongside the pump will require the most critical boom configuration that will cause the highest loss of air content. If concrete at a higher air content (to compensate for this loss) is placed at a less critical, more horizontal boom configuration, the concrete placed in the structure will be at a ...
Get Price2017-3-14 · The concrete producer and contractor should determine slump requirements. March 14, 2017. Bruce Suprenant, P.E. Ward R. Malisch, P.E. Table 1. The floor placement is running smoothly. Concrete ...
Get Price2017-7-5 · The Concrete Slump Test is largely intended to check the Workability of the mix. What good does it do to test workability when only half the batch is left. The Minnesota DOT specifies that the Slump Test shall be taken after the first 1/3 of a yard has been discharged. Strength tests are to be taken in the middle of a batch.
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Get PriceSlump is a measurement of the workability or consistency of concrete. In other words, it measures how easy the concrete is to push, mold and smooth out. Accordingly, its slump rating indicates what construction application the concrete is good for. The higher the slump, the more workable the concrete. If the slump of concrete is too low, it won ...
Get Price2018-1-15 · 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. Reinforced foundation walls and footings: a. Maximum Slump 75mm.
Get Price2021-7-14 · Concrete’s water content (at the time of pouring) is directly related to its strength. The wetter the concrete is poured (or high slump), the weaker the cured concrete will be. While water is essential to the curing process, it is destructive in excess amounts. Adding water to a concrete …
Get Price2016-3-21 · Concrete pumps can be either truck- or trailer mounted and range from small units, exerting pressures from 250 to 300 psi and outputs of 15 to 30 yd 3 /hr, to large units, exerting pressures of 1,000 psi and outputs up to 150 yd 3. The effective capacity of a pump depends not only on the pump itself but also on the complete system.
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