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As part of its separation into a new pure play water company, a new Pentair website has launched. Please visit the new Pentair. By submitting your information, you confirm that you agree to the storing and processing of your personal information by Pentair Aquatic Eco-Systems, Inc. Enter the total horizontal pipe length feet for your system. Select nominal pipe diameter inches using the pull-down menu.
Enter total pumping lift or height feet water is pumped vertically. Enter any misc. Enter the number of pipe fittings elbows, tees. Select a pump based on flowrate and total head loss requirements. Filtration Biological Filtration Biomedia Bioreactors. Specialty Protein Skimmers. Liners Pond Liners Tank Liners. Sign Up for Special Offers By submitting your information, you confirm that you agree to the storing and processing of your personal information by Pentair Aquatic Eco-Systems, Inc.
All tanks have ultraviolet inhibitors for outdoor use. Black has the greatest UV resistance, providing a life expectancy of 25 years. All colors except black and materials used are FDA-approved.
Another feature of polyethylene tanks is that they can be repaired. Just use heat to soften and reshape. Enter flowrate delivered by the pump gallons per minute.Contact your MEVA representative for guidance in your territory if you want to use it outside Europe.
Formwork Pressure Calculator. The reshoring calculator backpropping calculator is based on the guidelines set out in the DBV German Concrete and Building Technology Association memorandum on concrete formwork and stripping timelines. By using the MEVA calculator tools, the user accepts the following terms and conditions of use:. They have been thoroughly tested before being made available on the MEVA website and in the App-Stores for iOS and Android applications, yet no guarantee of freedom from error can be given.
The results calculated with and obtained from the MEVA calculation tools must be carefully cross-checked by the user. Until further notice, the MEVA calculation tools shall be made available without charge and — insofar as legally permissible — to the express exclusion of any and all warranty rights. Liability is excluded for all cases of damage to life, health and limb resulting from gross negligence or malicious neglect of duty by MEVA or its subcontractors.
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The information contained on the MEVA website and in the MEVA application, including the calculation tools are the intellectual property of MEVA and may not be altered, supplemented, sold, rented or otherwise commercially exploited, in any manner whatever, without the prior written consent of MEVA.
If any provision s of these terms and conditions of use should be or become inoperative, whether in whole or in part, or if the terms and conditions are found to contain a loophole, this shall have no bearing upon the validity of the remaining terms and conditions.
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Only German law shall apply. Contact: Please e-mail any questions concerning these terms and conditions of use or the utilisation of the calculation tools to the following e-mail address: info meva. You are facing a difficult concrete pour, for instance when building very high walls and wish to be on the safe side when it comes to concrete setting time? SolidCheck is a portable measuring device that enables you to determine the exact setting time of the concrete actually batched to your site.
Knowing the exact setting time allows you to utilise the concrete load capacity of your formwork fully and safely. MEVA offers this innovative ultrasonic measuring technology as a service to your site, including a trained professional operator to conduct the measurement with you. Search term. Home Web Services Concrete pressure calculator. Download the Calculator with american units Formwork Pressure Calculator.
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Concrete Setting Time.On the typical concrete pour, your goal is to place the concrete as close as possible to its final destination—not only to save hauling time and boost productivity, but also to avoid overhandling the concrete.
But on many concrete jobs, the ready-mix truck can't gain access to the work site. When you're placing a stamped concrete patio in a fenced backyard, a decorative floor inside in an enclosed building or working on a high-rise building, you must find another way to move the concrete from the truck to the point of placement.
Pumping is an efficient, reliable and economical means of placing concrete, and sometimes the only way of getting concrete into certain locations. Other times, simply the ease and speed of pumping concrete make it the most economical method of concrete placement. In the end, the convenience of easy access for truck mixers must be weighed against the desirability of locating the pump closer to the placement point.
When concrete is pumped, it is separated from the pump line walls by a lubricating layer of water, cement and sand. Naturally, the concrete mix must be suitable for its particular application, but it must also contain enough water for the mix to move easily through the reducers, bends and hoses found in most basic pipeline setups. Pump primers can greatly reduce issues associated with pumping concrete and help pumping lines last longer.
It is important to have all concrete mixes specified as "pumpable" prior to any concrete pours. There are mixes that do not pump at all or cause the pump lines to clog. This can cause big problems if you have 8 trucks arriving on the job ready to discharge concrete.
See more about removing blockages. In order to optimize the concrete pumping operation, the most efficient configuration of the system must be determined. The correct line pressure must be determined to move concrete at a specified rate of flow through a pipeline of a particular length and diameter. The major factors affecting pipeline pressure are:. In addition, a number of other factors must be taken into account when determining line pressure, including:.
Larger-diameter pipelines require less pumping pressure than smaller-diameter pipes. However, there are disadvantages to using the larger conduits, such as increased blocking, bracing and labor needed. Regarding the concrete mix in relation to line diameter, the maximum size of aggregate should be no larger than one-third of the diameter of the line, according to ACI standards. Concrete being pumped through a line experiences friction with the internal wall of the pipeline.
The longer the line, the more friction encountered. For longer pumping distances, the use of smooth-walled steel pipe can lower the resistance. The length of hose used at the end of the pipeline adds to the overall line length as well. The farther or higher the concrete needs to go, the more pressure it will take to get it there.
If there is a long horizontal distance to cover, one option is to use two lines and two pumps, with the first pump feeding into the hopper of the second pump.
This method may be more efficient than a single, long-distance line. Because of resistance encountered with changes in direction, the pipeline layout should be designed with the least number of bends possible.
Resistance will also increase if there is a reduction in pipe diameter along the path the concrete travels. Whenever possible, the same diameter line should be used. However, if reducers are needed, longer reducers will cause less resistance. Less force is needed to push concrete through an eight-foot reducer than through a four-foot reducer.
Boom trucks are self-contained units consisting of a truck and frame, and the pump itself. Boom trucks are used for concrete pours for everything from slabs and medium high-rise buildings, to large-volume commercial and industrial projects.
Booms for these trucks can come in configurations of three and four sections, with a low unfolding height of about 16 feet that makes it ideal for placing concrete in confined areas. Longer, five-part booms can reach up or out more than feet.A new method is proposed to estimate pumping pressure based on concrete composition without experimental measurements.
Previous studies show that the pumping pressure depends on the interface friction between concrete and the wall of the pumping pipes. This friction is determined by the thickness and the rheology of the boundary layer formed at the interface. The latter is mainly formed by water, cement, and fine sand particles which come from concrete. Hence, interface parameters, which are the viscous constant and the interface yield stress, are directly related to concrete composition.
Then, the pressure estimation method is proposed using the two models to calculate the interface parameters. The validation of the method is carried out basing on the comparison with real measurements on the building site. Concrete pumping technique is widely used in modern construction field high rise buildings and long spans bridges. The feasibility that concrete could be pumped is defined as workability, also called pumpability or flowability as discussed by Xie et al.
The main parameters of pumpability have been reviewed and studied [ 4 — 8 ] and can be divided into site conditions type of pump, size, length and material of pipe, energy use, required flow, etc. Previous studies conclude that for most of concretes, flows occur as a plug in the pumping pipe as discussed elsewhere [ 610 — 14 ].
In this case, the concrete moves by sliding thanks to a concrete boundary layer formed at the interface. From a theoretical point of view, pumping of concrete would not be possible without the formation of this layer as discussed by Morinaga [ 11 ]. When the pumping speed increases and the interface shear stress is higher than the concrete yield stressthe concrete zone near the wall starts to be sheared.
In this case, the concrete moves by sliding and shearing in the pipe. Recently, simulations results of Le [ 6 ] confirmed clearly that, for ordinary concretes or for high performance concretes HPCthe concrete moves by sliding thanks to the boundary layer. Moreover, for self-compacting concrete SCCshearing component is added to sliding see Figure 1.
In this case, the pumping pressure depends not only on the interface parameters, but also on the rheological parameters. Knowing the important role of the boundary layer for the pumping pressure and thus the concrete pumpability, many researchers have tried to highlight the relationship between its composition and that of concrete. They have attempted to evaluate the thickness of this layer too.
The results of the researches show that the boundary layer consists of water, cement, and fine sand particles which come from concrete as discussed by Ngo et al.
Many studies proved that the thickness and rheological properties of the boundary layer seem to depend on the mix proportion of the concrete as discussed elsewhere [ 21617 ]. In order to take into account effect of the flow regime of concrete in the pipe by sliding or by sliding and shearing on the pressure, in a previous study of Kaplan [ 4 ], a pumping pressure model has been proposed and validated.
The model is composed of two tendencies corresponding to each concrete flow regime in the pipe.
Long-distance concrete pumping: does your pump meet your job’s pressure requirements? [CALCULATOR]
As discussed below, if the pumping flow is higher than a certain value of pumping flow and it results in an interface shear stress that is higher than the concrete yield stressthe concrete zone near the wall starts to be sheared.
And calculation of the pumping pressure has to take into account the rheological parameters. The pumping flow beyond that the concrete zone near the wall starts to be sheared can be calculated as follows: In this case the pumping pressure is calculated by where is concrete plastic viscosity Pa s and is concrete yield stress Pa. Generally, the mechanical parameters,and were fixed in the building site.
The latter is measured by a rheometer. All the tribometers have the same goal, that is, to measure the interface friction between the concrete and the pumping pipes wall generally in steelaccording to pumping speed in the pumping pipe or rotation speed in the tribometrical test. The interface friction measurements allow calculating the interface parameters. Kaplan has also shown in his study, using his tribometer, the relationship between the interface parameters and the interface friction which determines the pumping pressure.
Equation 4 shows an important role of the interface parameters on the pumping pressure.Modular 9mm suppressor
It shows that the viscous constant determines the evolution of the friction with the pumping speed when the pumping regime is established and that the interface yield stress determines the initial pumping pressure which is necessary to initiate the concrete flow as discussed by Ngo et al. In this study, the authors are interested in the pumping pressure of ordinary concrete whose rheological behavior can be described as Binghamian fluids as discussed elsewhere [ 47814151921 — 25 ].Long-distance concrete pumping is not for the faint of heart.
And when it comes to tunnel construction, it is more often than not the order of the day. In this particular post, we will look at the pressure component in long-distance concrete pumping.
How does one go about calculating pressure for a specific job? And how exactly do you know whether your machine is up for the task at hand?Intitle index of mkv malayalam
Join us as we explore the wonderful world of pressure in long-distance concrete pumping. As such, when you calculate the required pressure, you will know whether your machine can carry out the job and at what output capacity. And calculating it, albeit for estimate purposes, is not exactly a piece of cake — unless you have the right tools, that is. Just like any other calculation, the process involves filling in blanks before the final unveil read: before the magic number is revealed.
Please keep in mind that you will later need to validate your results with on-site testing. Now this is where things get interesting for you.
So those variables listed above?
Simply enter them into our tool, and you will be rewarded with a fresh estimate of your long-distance pumping pressure requirements. Not too shabby, eh? You can download it for free by clicking the button at the bottom of this page. In order to be considered long distance, a concrete pumping effort must span a distance of at least metres? Our formula was drawn up with a medium-grade concrete in mind. To determine the friction coefficient of your particular concrete and therefore obtain a more accurate value, you will need to conduct your own tests on site using a SLIPER rheometer.
Checklist: is your machine up for the job? The maximum output you wish to reach. The pressure needed to carry out the job. Start-up pressure — as a rule, this element is standard across the board and consists of a recommendation of 20 bars. Height in metres — this variable takes into account variations in height from your point of pumping to the destination. Total length in metres — by this we mean actual length, not just flat length.
Did you know that. One more thing Our formula was drawn up with a medium-grade concrete in mind. You liked it?The Concrete Calculator estimates the volume and weight of concrete necessary to cover a given area. Purchasing slightly more concrete than the estimated result can reduce the probability of having insufficient concrete.Pump total Dynamic Head Calculation
Related Volume Calculator. Concrete is a material comprised of a number of coarse aggregates particulate materials such as sand, gravel, crushed stone, and slag bonded with cement. Cement is a substance that is used to bind materials, such as aggregate, by adhering to said materials, then hardening over time. While there are many types of cement, Portland cement is the most commonly used cement, and is an ingredient in concrete, mortar, and plasters.
Concrete can be purchased in multiple forms, including in 60 or pound bags, or delivered in large amounts by specialized concrete mixer trucks. Proper mixing is essential for the production of strong, uniform concrete. It involves mixing water, aggregate, cement, and any desired additives. Production of concrete is time-sensitive, and the concrete must be placed before it hardens since it is usually prepared as a viscous fluid. Some concretes are even designed to harden more quickly for applications that require rapid set time.
Alternatively, in some factory settings, concrete is mixed into dryer forms to manufacture precast concrete products such as concrete walls. The process of concrete hardening once it has been placed is called curing, and is a slow process.
Ensuring that the concrete is damp can increase the strength of the concrete during the early stages of curing. This is achieved through techniques such as spraying concrete slabs with compounds that create a film over the concrete that retains water, as well as ponding, where concrete is submerged in water and wrapped in plastic.
CONCRETE CALCULATOR - How Much Do I Need?
News Current Archive Newsletter Events. Time between the first addition of water for making the concrete and the point in time at wich the concrete is full set. Fresh concrete temperature used to determine the end of setting tE.Animal crossing flag designs
Temperature of fresh concrete just after placing between the formwork. Dead weight divided by the volume of the fresh concrete after compaction. Please note that in any case the DIN and its regulations are valid.
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This involves: the optimal functionality of our website and a tailored design by analysing visits to the website The main purpose of this is to adapt our offers to our customers' preferences, and also to make your visit to the website as convenient as possible.
Request further information. Yes, I agree to the use of non-essential cookies. Assumptions: Outside temperature has no influence on concrete temperature. Measure of the deformability and flowability of the fresh concrete.
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