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description of the process of pumping high performance concrete

    Concrete pump - Wikipedia

    A concrete pump is a machine used for transferring liquid concrete by pumping.There are two types of concrete pumps. The first type of concrete pump is attached to a truck or longer units are on semi-trailers. It is known as a boom concrete pump because it uses a remote-controlled articulating robotic arm (called a boom) to place concrete accurately.. Boom pumps are used

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    Making Concrete Pumpable Concrete Construction Magazine

    Jan 29, 2020  “We pump at such high pressures today,” says Gary Brown, director of concrete pumping for R.L. McCoy Inc., an Indianapolis, Ind.–based concrete pumping company. “It places stress on the equipment.” And that stress can cause equipment to fail.

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    High Performance Concrete - an overview ScienceDirect Topics

    Besides the production of high-performance concrete, superplasticizers are also commonly used in the production of high-workability concrete. With a slump value of 180–230 mm, high-workability concrete can be pumped rapidly over long distances, easily compacted in structures with highly congested reinforcement, and can even be self-compacting ...

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    Pumping of concrete - SlideShare

    Feb 23, 2014  The presence of a lubricating film of mortar at the walls of the pipe also greatly reduces the friction High cement content in concrete is generally beneficial for pumping Water is the only pumpable component in the concrete, and transmits the pressure on to the other components Two types of blockage to efficient pumping could occur: (1) Water ...

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    Application of High Performance Concrete

    2. Production of High Performance Concrete The British standards are utilized as a basis for the contract documents and high performance concrete was used significantly in the project. The definition of high performance concrete utilized for the project includes high strength concrete, workability, and durability.

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    (PDF) Concrete for high-rise buildings: Performance ...

    This paper describes the how the extreme concreting challenges were overcome on the project, including successfully pumping and placing high-performance concrete to unprecedented heights as well ...

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    high performance concrete Topic

    Feb 01, 2021  High-performance concrete (HPC) is concrete that has been designed to be more durable and, if necessary, stronger than conventional concrete. HPC mixtures are composed of essentially the same materials as conventional concrete mixtures, but the proportions are designed, or engineered, to provide the strength and durability needed for the

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    Civil Engineering: HIGH PERFORMANCE CONCRETE

    Jun 11, 2010  The workability of High Performance Concrete is normally good, even at low slumps, and High Performance Concrete typically pumps very well, due to the ample volume cementitious materials and the presence if chemical admixtures. High Performance Concrete has been successfully pumped even up to 80 storeys.

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    High Performance Concrete - SlideShare

    Apr 08, 2015  High Performance Concrete • The development of high performance concrete (HPC) is a giant step in making concrete a high-tech material with enhanced characteristics and durability. High performance concrete is an engineered concrete obtained through a careful selection and proportioning of its constituents.

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    High-Performance Concrete: Composition, and Features

    High-performance concrete (HPC) is produced by careful selection and proportioning of its constituents namely cement, sand, gravel, cementitious materials such as fly ash; silica fume; and slag, and chemical admixtures for instance high range water reducing admixtures. The strength and durability of the high-performance concrete exceed that of ordinary concrete.

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    INFLUENCE OF PUMPING ON CHARACTERISTICS OF AIR-VOID SYSTEM ...

    INFLUENCE OF PUMPING ON CHARACTERISTICS OF AIR-VOID SYSTEM OF HIGH-PERFORMANCE CONCRETE. The results of an experimental study in which a high-performance air-entrained concrete mixture (water-cement ratio = 0.29; 28-day average compressive strength of 75 MPa) was pumped at the job site horizontally and vertically are

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    Preparation of C80~C100 High Performance Concrete and the ...

    The high strength and high performance concrete C80~C100 is popularly used nowadays, especially in the West-Tower Project of Gungzhou. In order to provide reference for the use of high strength concrete and the development of ultrahigh pumping technology, the following six aspects were studied, namely the preparation of high strength concrete, the variation of the concrete mixture under high ...

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    High Strength and High Performance Concrete Materials and ...

    High-Performance Concrete: High-Strength Concrete: Definition: High-performance concrete is defined as concrete meeting special combinations of performance and uniformity requirements that cannot always be achieved routinely when using conventional constituents and normal mixing, placing and curing practices, as per ACI Code.

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    The effects of pumping on the air content and void ...

    Dec 01, 2019  1. Introduction and Background. The (wet-mix) shotcreting process consists of pumping a plastic or flowable concrete through a conveying hose or tube, and then adding pressurized air at the nozzle to spray the concrete towards the substrate at a high velocity to achieve compaction.

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    (PDF) HIGH-STRENGTH CONCRETE (HSC)-MATERIAL FOR HIGH

    As additional literature for deeper study on high–strength concrete is the book “High–Strength Concrete” [3], by Michael A. Caldarone, and “Journal of Mechanical and Civil Engineering ...

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    Pouring Concrete – How to Pour Concrete (8 Steps) - The ...

    Oct 09, 2020  A concrete truck may be able to pull up to the site and pour right into the forms. If the site is on the other side of the house or building, the truck may pour into wheel barrows or a concrete pump to get the wet concrete to the site. Concrete should not be placed when temperatures will drop below 20F.

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    CENTRIFUGAL PUMP SELECTION, SIZING, AND

    PUMP SELECTION, SIZING AND INTERPRETATION OF PERFORMANCE CURVES 4 • 3 Performance Curve At some point in the pump selection process, the impeller diameter is selected. For an existing pump, the diameter of the impeller is known. For a new pump

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    Features of a Portable Concrete Pump Machine

    Jan 08, 2020  ABT60C concrete pump in Indonesia – Reliable Performance. The portable concrete pump can pump concrete efficiently throughout the process without any major interruption. Most portable concrete pumps make use of the advanced s-valve which ensures reliable performance and it is also easy to maintain. – Long-Sevice Life

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    Microstructure of Concrete IntechOpen

    Oct 27, 2015  Concrete is a composite material that consists of a binding medium and aggregate particles and can be formed in several types. It may be considered to consist of three phases: a cement paste, the aggregate, and the interfacial transition zone (ITZ) between them. In addition to ordinary Portland cement, the essential components of the base of concrete are aggregates

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    High-Strength Concrete - Pennsylvania State University

    High-Strength Concrete. High-performance concrete is a term used to describe concrete with special properties not attributed to normal concrete. High-performance means that the concrete has one or more of the following properties: low shrinkage, low permeability, a high modulus of elasticity, or high strength.

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    Ultra-High Performance Concrete

    Ultra-High Performance Concrete (UHPC) is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square inch (120 MPa) with specified durability, tensile ductility and toughness requirements; fibers are generally included in the mixture to achieve specified requirements.

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    State of the Art on Prediction of Concrete Pumping ...

    Jun 16, 2016  Large scale constructions needs to estimate a possibility for pumping concrete. In this paper, the state of the art on prediction of concrete pumping including analytical and experimental works is presented. The existing methods to measure the rheological properties of slip layer (or called lubricating layer) are first introduced. Second, based on the rheological

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    The construction process for pre-stressed ultra high ...

    Nov 04, 2020  The tower is founded with high performance reinforced concrete pile to support the raft foundation. The reinforced concrete raft foundation utilized high-performance Self Compacting Concrete (SCC). Fig 3 shows the Raft Foundation System. The diameter of 1500mm and height of 18m reinforced concrete bored piles are set to construct the foundation ...

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    High Performance Concrete Admixtures

    High-range water reducers, commonly called superplasticizers, were developed for high-strength and high performance concrete applications. Superplasticizers, e.g., Multiplast Super can take a 3- inch slump concrete to a 9-inch slump without risk

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    Influence of Pumping on Characteristics of Air-Void

    Influence of Pumping on Characteristics of Air-Void System of High-Performance Concrete R. PLEAU, M. PIGEON, A. LAMONTAGNE, AND M. LESSARD The results of an experimental study in which a high-performance air­ entrained concretemixture (water-cement ratio= 0.29; 28-day average compressive strength of 75 MPa) was pumped at the job site horizon­

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    Effect of pumping and spraying processes on the ...

    Effect of pump and spray process on rheology of concrete was investigated. • Mechanism of pump and spray process affecting concrete rheology was expounded. • Prediction models of the changes of concrete performance were built. • Influence degree of wet-mix shotcrete process on concrete rheology was analyzed.

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    Simulation Analysis of Pumping and Its Variability for ...

    In the process of pumping, the pumping pressure causes the air void structure of the hardened manufactured sand concrete to change. The number of big air voids decreases, air void ratio increases, total porosity is reduced, and the resistance to chloride ion permeability is superior to the level before pumping.

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    Electric Concrete Pump - Different Types of Concrete Pumps ...

    Electric concrete pump has advantages as small size, light weight, high configuration, stable performance, flexible use, long pumping distance, high quality pumping concrete. Small electric concrete pump is mainly used in the small construction sites.

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    High Performance Concrete Admixtures

    High-range water reducers, commonly called superplasticizers, were developed for high-strength and high performance concrete applications. Superplasticizers, e.g., Multiplast Super can take a 3- inch slump concrete to a 9-inch slump without risk

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    618508 Ultra High Performance Concrete Overlay

    Oct 18, 2018  618508– Ultra High Performance Concrete Overlay Description: This specification consists of supplying, mixing, transporting, placing, finishing, curing, and diamond grinding of Ultra High Performance Concrete (UHPC) for use as a structural overlay and riding surface in accordance with the Contract Documents and as directed by the Engineer.

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    High strength concrete

    High strength concrete. High strength concrete (HSC) may be defined as concrete with a specified characteristic cube strength between 60 and 100 N/mm 2, although higher strengths have been achieved and used.Strength levels of 80 to 100 N/mm 2 and even higher are being used for both precast and in-situ work in the USA, France, Norway and some other countries.

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    5 Rules of Watertightness - National Precast Concrete ...

    Nov 05, 2012  The w/c ratio is the most important factor in concrete design. The water content in a mix controls the moisture’s rate of entry (which may contain aggressive chemicals) and the movement of water during the freeze-thaw process. Compare the leading causes of low durability versus high-quality concrete listed in Figure 2.

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    CN101244909A - Highly durable high slump loss resistant no ...

    The invention relates to a non-bleeding concrete pumping admixture with high durability and high slump retaining, the raw material weight percentage composition of which is: 25 to 45 percent of naphthalene series water reducer, 2 to 6 percent of polycarboxylic series of water reducer, 1 to 4 percent of sodium lignosulfonate, 0.5 to 2 percent of sodium gluconate, 0.2 to 2

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    23 Types of Concrete Used in Construction and their ...

    In terms of performance, the high strength concrete ought to be less performing in terms of workability which is an issue. 12. High-Performance Concrete. These concretes conform to a particular standard but in no case, will be limited to strength. It has to be noted that all the high strength concrete can be high-performance type.

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    Pump and piping sizing

    Pump and piping sizing June 2019 Jacques Chaurette There is no reason why anyone should not be able to go out and buy a pump, do the installation, and be satisfied with the results. There are 3 things to establish: the flow rate which can be easily determined, this is your basic requirement, the height to which you need to deliver

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    Best Practices Guidelines for Concrete Construction

    American Concrete Pumping Association (ACPA) ... cation of the specialized concrete performance requirements for the project and identifying the ability of the concrete supplier to deliver the product(s) ... process the capability to supply special needs for the project. Any limitations related to the special needs

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    High Performance Concrete Formwork - ULMA Construction

    A wide range of ULMA Construction Formwork Systems for the accurate forming of any concrete structure, on a rental and sale basis. We offer the suitable equipment for any kind of construction project. Our portfolio comprises wall, column and slab formwork, shoring systems, high-tech climbing formwork, timber beams and plywood, highly flexible tunnel and bridge formwork

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    Placing and Finishing Concrete - Portland Cement Association

    Concrete that will be visible, such as driveways, highways, or patios, often needs finishing. Slabs can be finished in many ways, depending on the intended service use. Options include various colors and textures, such as exposed aggregate or a patterned-stamped surface.

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