pumping concrete proportion
Workability and proportion design of pumping concrete ...
2013-7-1 · Mixture design of concrete is an often discussed topic in concrete study, concrete’s workability varies with the proportion change. Tregger et al. mentioned a way to test the segregation of self-consolidating concrete via adding different ratios of viscosity-modifying agent (VMA). They conducted a mini-slump flow test and show the distribution of aggregates around
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Workability and proportion design of pumping concrete ...
Request PDF | Workability and proportion design of pumping concrete based on rheological parameters | In this paper a method is introduced to find
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Investigating and optimizing the mix proportion of
2017-9-30 · Note that all mixture proportions are based on literatures reported and practical experiments , , , , , at first fresh concrete with 29 mm fiber suffered the blockage problem during pumping because the long fiber was difficult to be dispersed completely when fibers was added directly in fresh concrete. So the way of adding fibers was replaced ...
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无背索斜拉桥主塔C50P6泵送混凝土配合比优化设计 - 中国 ...
Optimization Design of Pumping Concrete Proportion for Main Tower C50P6 of Cable-stayed Bridge without Back Cable 推荐 CAJ 下载 PDF下载 不支持迅雷等下载工具，请取消加速工具后下载。 【作者】 王娜娜； 段磊； 周官封； ...
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Discussion of Mix Proportions of Concrete for Long ...
Long-distance pumping of concrete (up to 2000 m, with relay pumps installed at two locations) was carried out for placing invert concrete at a caisson—the construction site of a spillway discharge section. After quantifying the required performance and determining of the mix proportions of the invert concrete that would be used in the long-distance pumping, the
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Mix Design for Pumped Concrete with PPC, OPC,
2 天前 · Concretes without admixtures and of high cement content, (over about 460 kg/m 3) are liable to prove difficult to pump, because of high friction between the concrete and the pipeline.Cement contents below 270 to 320 kg/m 3 depending upon the proportion of the aggregate may also prove difficult to pump because of segregation within the pipe line.
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Mix Design and Pumped Concrete - Civil Engineering
Concrete without admixtures and of high cement content, over about 460 kg/m 3 are liable to prove difficult to pump, because of high friction between the concrete and the pipeline. Cement contents below 270 to 320 kg/m 3 depending upon the proportion of the aggregate may also prove difficult to pump because of segregation within the pipe line.
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Pumping of Concrete: System, Working and Problems ...
2022-2-9 · Pumping of concrete is economical if the quantity of concrete required is more than about 1150 m 3 or uninterrupted supply of concrete is needed over a long period as at the beginning of each period of pumping the pipes have to be lubricated by mortar (at the rate of about 0.25 in 3 per 1000 m length of 150 mm diameter pipe) and also at the end of the
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Prediction of Concrete Pumping Using Various Rheological ...
2014-7-8 · When concrete is being transported through a pipe, the lubrication layer is formed at the interface between concrete and the pipe wall and is the major factor facilitating concrete pumping. A possible mechanism that illustrates to the formation of the layer is the shear-induced particle migration and determining the rheological parameters is a paramount factor to
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谢海波-兰州理工大学 - lut
2019-3-7 · Xie H, Liu F, Fan Y, et al. Workability and proportion design of pumping concrete based on rheological parameters[J]. construction and Building Materials, 2013, 44: 267-275. Xie H, Ren H, Yang H, et al. Influence of Pressure Build-Up Time of Compression Chamber on Improving the Operation Frequency of a Single-Piston Hydraulic Free-Piston Engine[J].
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Mix Design for Pumped Concrete with PPC, OPC,
2 天前 · Concretes without admixtures and of high cement content, (over about 460 kg/m 3) are liable to prove difficult to pump, because of high friction between the concrete and the pipeline.Cement contents below 270 to 320 kg/m 3 depending upon the proportion of the aggregate may also prove difficult to pump because of segregation within the pipe line.
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Mix Design for Pumpable Concrete | Materials | Concrete ...
2022-2-7 · This property can be achieved by adding more fine particles. Thus the proportion of fines is of prime importance. For pumpable concrete the contents of fines (cement + fine aggregate) 350 kg/m 3 to 400 kg/m 3 are considered necessary. This amount of fines is also necessary for maintaining lubricating film around the concrete plug to reduce wear and tear of
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Difficult problems and countermeasures of pumping
2021-10-8 · (6) Low-strength concrete tends to bleed (normal). (7) Concrete with a small proportion of sand is prone to bleeding and segregation. (8) Continuous grain size crushed stone is smaller than concrete bleeding of single size crushed stone. (9) Concrete with low water retention, thickening, and air entrainment of concrete admixtures tends to bleed.
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What Is A Concrete Pump | Types Of Concrete Pumps
2022-2-10 · Concrete Pumping: Ordinary Concrete Placing: Faster concrete placement: Speed of the placing is always an important factor when it comes to a big-sized construction project. The main benefits of concrete pumping are that it
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Influence of Mix Proportions on Rheological Properties ...
the cement paste content has a positive effect on concrete pumping. Choi et al. [12] studied the effect of different coarse aggregate sizes on the rheological properties of fresh con-
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Mix Proportion of Materials in Pervious Concrete
2019-4-9 · The pervious concrete needs proper mix design. The proportion of cement, fly ash or GGBS, water, coarse aggregate and water-cement ratio have been calculated with the help of Indian standard code (IS: 10262 : 2009). To cast the concrete cubes the mix design is
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Factors Affecting Pumping of Concrete - Civil Bull
2021-7-18 · A concrete pumped through a pipeline up to a certain distance or height is called pumpable concrete. There are several properties of concrete and its components which affect the pumping quality of concrete. Some significant factors are aggregates, admixtures, and weather. This article will discuss every aspect of these elements how they ...
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8 ESSENTIAL QUALITY REQUIREMENTS OF PUMPED
2016-3-21 · 8. Planning. Proper planning of the entire pumping operation including pump location, line layout, placing sequence, and concrete supply will result in savings of time and expense. The pump should be as near the placement area as possible. Concrete delivery systems should have easy access to the pump.
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Concrete Mix Ratio And Their Tpyes - 2020 Guide
2022-2-10 · Different types of Concrete Grade Ratio. Concrete mix design is process of preparation of concrete with suitable proportion of ingredients to meet the required strength and durability of concrete structure. Every ingredient of
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Concrete Mix Design | Concrete Mix Design Calculations
2020-11-4 · Concrete Mix Design. The Bureau of Indian Standards recommended a set procedure for the design of concrete mix mainly based on the work done in national laboratories.. The Concrete Mix Design procedure is covered in IS 10262 2019.The methods can utilize for both medium strength and high strength concrete.. The guidelines for concrete mix design is 10262
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Discussion of Mix Proportions of Concrete for Long ...
Long-distance pumping of concrete (up to 2000 m, with relay pumps installed at two locations) was carried out for placing invert concrete at a caisson—the construction site of a spillway discharge section. After quantifying the required performance and determining of the mix proportions of the invert concrete that would be used in the long-distance pumping, the
Read More
Mix Design for Pumpable Concrete | Materials | Concrete ...
2022-2-7 · This property can be achieved by adding more fine particles. Thus the proportion of fines is of prime importance. For pumpable concrete the contents of fines (cement + fine aggregate) 350 kg/m 3 to 400 kg/m 3 are considered necessary. This amount of fines is also necessary for maintaining lubricating film around the concrete plug to reduce wear and tear of
Read More
What Is A Concrete Pump | Types Of Concrete
2022-2-10 · Concrete Pumping: Ordinary Concrete Placing: Faster concrete placement: Speed of the placing is always an important factor when it comes to a big-sized construction project. The main benefits of concrete pumping are that
Read More
Difficult problems and countermeasures of pumping
2021-10-8 · (6) Low-strength concrete tends to bleed (normal). (7) Concrete with a small proportion of sand is prone to bleeding and segregation. (8) Continuous grain size crushed stone is smaller than concrete bleeding of single size crushed stone. (9) Concrete with low water retention, thickening, and air entrainment of concrete admixtures tends to bleed.
Read More
Factors Affecting Pumping of Concrete - Civil Bull
2021-7-18 · A concrete pumped through a pipeline up to a certain distance or height is called pumpable concrete. There are several properties of concrete and its components which affect the pumping quality of concrete. Some significant factors are aggregates, admixtures, and weather. This article will discuss every aspect of these elements how they ...
Read More
8 ESSENTIAL QUALITY REQUIREMENTS OF PUMPED
2016-3-21 · 8. Planning. Proper planning of the entire pumping operation including pump location, line layout, placing sequence, and concrete supply will result in savings of time and expense. The pump should be as near the placement area as possible. Concrete delivery systems should have easy access to the pump.
Read More
Concrete Mix Ratio And Their Tpyes - 2020 Guide
2022-2-10 · Different types of Concrete Grade Ratio. Concrete mix design is process of preparation of concrete with suitable proportion of ingredients to meet the required strength and durability of concrete structure. Every ingredient of
Read More
Concrete Techniques And Applications For Pumping ...
2017-8-2 · This means checking that your pumping concrete techniques and applications are working hard for you, instead of making you do extra work. Applications include all types of sawing cutting and drilling work afterwords. Once the concrete is laid please ensure that that concrete is cut, with a saw cutting machine.
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Record of 400-meter pumping height is created in China ...
2018-6-5 · The company made experiments to improve the concrete mix proportion, replace the pumping facility, and revise the pumping tunnels to solve the concrete quality problem step by step. At the same time, the company organized a special supply team to meet the challenges caused by the fact that the project was located in the middle of the city so that the construction
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Different Types of Concrete - Dynamic Concrete Pumping
2020-3-28 · 19. Asphalt Concrete. More commonly known as “asphalt” or “blacktop,” this is a form of concrete frequently used on roads, on airport runways, on highways, in parking lots, for sidewalks — basically anywhere pavement is needed. Asphalt is a dark mineral composed of a mixture of hydrocarbons called bitumens.
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