Pumping of concrete pdf

The study involved elaborating general information about pumped concrete, factors affecting productivity of concreting in high rise building, equipments and. The concrete pumping code of practice 2019 pdf, 2016. Squeeze pumps or peristaltic pumps are the ones that use vacuum pumping. The second type of pump is squeezed concrete pumps. One of the early studies on the pumping of concrete is the paper published by ede 12. Cip 1 00 concrete in practice cip 1 dusting concrete surfaces cip 2 scaling concrete surfaces cip 3 crazing concrete surfaces cip 4 cracking concrete surfaces cip 5 plastic shrinkage cracking cip 6 joints in concrete slabs on grade cip 7 cracks in concrete basement walls cip 8 discrepancies in yield cip 9 low concrete cylinder strength. Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. The concrete is fed in by gravity and is also partially sucked in during the suction stroke. While the ease of pumping depends on the type of pump available, the distance over which concrete is to be pumped, and the properties of the concrete, a number of finer aspects can affect the operation. The shortterm effects of pumping on the durability of concrete is well documented. A simple method of concrete mix design for pumpable concrete based on an estimated weight of the concrete per unit volume is described in the paper. For example, if dropped too far, the heavy or big aggregate particles can settle and lighter mix components, such as water, tend to rise. The system for pumping concrete essentially consists of a hopper into which the concrete is discharged from the mixer, which in turn, feeds the concrete pump itself and finally the delivery pipelines through which the concrete is delivered.

The core walls and ceilings were concreted in three sections per floor, and were com. The tables and figures presented are worked out by the author from a wide range of indian materials. With over 10 years of experience in the industry, the allied team can help provide. For given proportions of cement and aggregates without admixtures, the higher the slump, the wetter the mix. An approved code of practice is a practical guide to achieving the standards of health, safety and. A number of different designs of concrete pump were developed in the first half of the 20th century but it was friedrich wilhelm schwings company schwing. Manipulation of the pumping process to facilitate sampling, such as shutting off, jogging etc.

To make the concrete easier to pump and place as it comes out of the hose, many batch plants also add waterreducing admixtures known as superplasticizers to their concrete. The squeeze concrete pumps convey concrete by squeezing its pumping tube installed in the cylindrical drum as shown in the below figure. Pdf study of factors affecting productivity of pumped concrete for. A main problem is the optical inaccessibility of the material, which prevents. When concrete is pumped, it is separated from the pump line walls by a lubricating layer of water, cement and sand. The air loss due to pumping can be determined by measuring the air content of samples discharged from the ready mixed concrete truck and at discharge from the pump. We own, operate and maintain a full fleet of concrete pumps ranging anywhere from 33 to 46 meters. Experimental investigation of the pumping of a model. Concrete pumping is a highly specialized method of concrete placement that requires skilled operators to position a truckmounted, fullyarticulating boom for precise delivery of readymix concrete from mixer trucks to placing crews on a construction job site. Concrete admixtures by classification continued type of admixture desired effect material superplasticizer and increase flowability with retarded set see superplasticizers and also water reducers retarder astm c 1017, reduce watercement ratio type 2. The concrete is conveyed from the mixing truck to its. On small jobs a wheelbarrow is the easiest way to transport concrete. The valves open and close with definite pauses so that concrete moves in a series of impulses, but the pipe always remains full. In this 2 minute video, we show how our concrete pumping service works from start to finish.

Pumped concrete construction aggregate concrete scribd. Transportation the method used to transport concrete depends on which one is the lowest cost and easiest for the job size. Over a period of more than half a century, concrete pumps have slowly taken over from other methods of transferring liquid concrete. There are basically two types of concrete pumps used for transporting, they are. Introduction the technique of pumping concrete has been in general and continuous use of over sixty years. But you dont have to spell the mix out to your readymix supplier, since most suppliers have experience with concrete for pumping. When slump tests are to be made on a pumped concrete job. Using the proper safety equipment and resolving safety issues reduces the chances of concrete pumping accidents. A portable control panel which is connected to the concrete pump by a wired. The intent is to ensure that the specified air content is attained at the point of. Make sure youre protected from any accident that may occur by working alongside the concrete pump insurance brokers from allied insurance brokers.

The dos and donts of concrete pumping allied insurance. One difference between the mix proportions of lightweight and normal weight concrete for pumping is in the amount of fine aggregate used. Information on the properties of pumpable concrete canusa. A concrete pump is a tool for conveying liquid concrete. Concrete pumping code of practice commences 2 december. Many of the awesome features such as the electronic job ticket and time clocking, blanchet had a great influence on. Slump is a measure of concrete consistency or fluidity.

Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. However, these phenomena can hardly be considered in the usual rheological measurements. Hydraulic and electronic control solutions concrete pump truck. Loss of air content in pumped concrete will not reduce freeze thaw durability of concrete as long as the air void system is not compromised. A higher demand for highrise buildings worldwide, relatively recent advances in concrete technology and developments in construction methods has led to an increasing number of reinforced concrete. Blanchet concrete pumping recives technology award. Consistency is the ability of freshly mixed concrete to flow. Blanchet, matt mcdonald and team, have worked directly with rapid applications to streamline their concrete pumping company.

Pump primers can greatly reduce issues associated with. Fourinch 4 slump is very common with normal weight concrete and is a good average slump for pumping. 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. Concrete pumps and concrete pumping information the. Doc concrete pumping history erdenebaatar ganbaatar. The interesting observations of his study are that hydraulic conditions are present during concrete pumping and that the amount of friction is not related to the pressure applied, which in turns means that the energy loss in a straight length of. Pdf effect of pumping on properties of bridge concrete. During field trials, involving pumping of self compacting concrete, changes in rheological properties have been observed. The first word of caution is that the concrete mix, no matter how well it is designed, should be field tested to confirm its pumpability before the project starts.

The most common concrete pumps consist of a receiving hopper, two concrete pumping cylinders, and a valving system to alternately direct the flow of concrete into the pumping cylinders and from them to the pipeline fig. However, the output of the pipe should maintain a constant flow. Cip 21 loss of air content in pumped concrete what is air loss in pumping specifications increasingly require concrete to be sampled at the discharge end of a concrete pump and tested for air content. These pumps can cover a distance of 90 m horizontally and 30 m vertically, and are capable of pumping 20 m 3 of concrete per hour using 3 inch pipes.

Founded in 1965, carrolls building materials provides quality mix onsite concrete, concrete pumping, and a variety of other concrete products and services to contractors and individuals throughout the tampa bay area. Influence of pumping on fresh concrete properties for scc. The acpa has a wide catalog of concrete pumping safety decals, dvds, cds, posters, publications, and safety certification and training manuals available. One concrete cylinder receives concrete from the receiving hopper while the other discharges into the pipeline to provide a. The area into which the mixed concrete is discharged prior to being pumped into position. Washington state transportation center trac publication date. When a sample is obtained ensure that concrete is being discharged at a constant rate with a full pump line and avoiding a sputtering discharge. Pdf some issues related to pumping of concrete researchgate. Health and safety authority guidance on safety in concrete pumping 5 cy an 100 magenta 76 ye llow 0 black 27 2. Considerable progress which has been achieved in the past decade has undoubtedly.

Pdf guide to placing concrete by pumping methods guide to. Concrete pumps two types of concrete pumps see figure 1 are used. Research needs to advance concrete pumping technology. If you are interested in using cempump for your building projects in the midlands uk, please feel. Reinforced concrete construction formwork flat surfaces element bottom. Our 33 meter boom pump features a front spread of 6. Many practical aspects of processing fresh concrete depend on its rheology, such as the pumping of the material.

In order to predict possible changes, studies were undertaken on self compacting mortar scm where various mixing as well as. These pumps are capable of pumping m 3 of concrete per hour with 8 inch pipes. Pdf this guide discusses the use of pumps for transporting and placing concrete. Pumping, swinging, mixing, and flushing system high reliability and long service life for over 3 decades, danfoss has employed strict zerodefect processes and long service life concept in europe, to eradicate any loss caused by faults and offer a longlived pump truck. Our dedication and ability to satisfy customers needs has earned us a reputation of dependability. The motion of concrete always in the form of impulse. Cavan concrete pumping is a full service material placement company. Air entrainment and concrete some things every contractor should know about a combination that assures longerlasting and more attractive concrete this photomicrograph of air entrained plastic concrete suggests how minute bubbles of air function as very small ball bearings which make the concrete more workable than a nonair entrained mix. Fully licensed and insured to perform work thoughout florida. It is known that a lubricating layer is formed in the process, which significantly reduces the pumping pressure. Pumping of concrete is widely used in large highway projects due to convenience and economy of placement.