Tremie Equipment Concrete Tremie Pipe 12" Dia X 4′ Long Concrete Hoppers

Basic Info.ApplicationConstruction Concrete PouringCertificationISO9001: 2000ConditionNewJoint TypeScrewed Joint / Cable TypeMaterialSeamless PipeLength0.5/1/1.5/2/3/4mThickness3-10mmAccessoriesHopper / Fork / Frame / Lifting Lug / SpannerOEMYesTrademarkRIGPATransport PackageWrapped with Plastic FilmOriginChinaHS Code8431432000Product DescriptionParameter:NameTremie pipeOther namesTremie tube / Concrete tremie pipe / Tremie concrete / Tremie pipe in pilingModelΦ219/φ260/φ300/φ325mmJoint typeScrewed joint / cable typeMaterialSeamless pipeApplicationFor concrete pouringPile diameterΦ219 for below 600mm piles, φ260 for 600mm - 1000mm piles,φ300mm for above 1000mm pilesIf it is necessary to move the tremie pipe laterally, it is better to lift it out vertically, plug it and start a new pour at the new position than to drag it sideways through freshly placed concrete. If the area of the pour is too large to manage from a single point, it is better to use several tremie pipes in parallel than to shift a single tremie pipe around. A spacing between tremie pipes of between 3.5 and 5m, and a distance of about 2.5m from the formwork has been recommended. The risk of segregation and uneven setting can be minimised by providing a continuous flow of concrete through all the tremie pipes to maintain a moderately even surface. The tremie tube is often supported by a working platform above the water level. The pipe is made up of short sections commonly joined by screw thread with O-ring seal so that the length can be adjusted during the pour without getting the top of the pipe below the water or removing the bottom end from below the surface of the poured concrete. To facilitate management of pipe length it may be built up from 1 to 3.5m sections. A foam rubber 'pig' may be used to plug the pipe while introducing the first batch of concrete.The tremie tube concrete placement method uses a vertical or nearly vertical pipe, through which concrete is placed by gravity feed below water level.The lower end of the tremie pipe is kept immersed in fresh concrete so that concrete rising from the bottom displaces the water, thus limiting washing out of the cement content of the fresh concrete to the exposed upper surface. The upper end of the tremie pipe is kept above the water level during the pour and is provided with a conical tremie pipe hopper for batch loading, or concrete may be pumped into the top of the tremie pipe. Concrete must be poured at a rate which avoids setting in the tremie. Admixtures may be used to control setting time, slump and workability. Vibration and jerking of the tremie pipe may be applied to encourage slumping and levelling of the upper surface of the pour, and the tremie pipe may need to be raised occasionally during the pour so that the bottom end is not too deeply embedded, but the pipe must not be moved sufficiently to break clear of the mound and expose the bottom opening to the water, as this would allow washout of cement.To start placement, the tremie pipe is first lowered into position. Air and water must be kept out of the tremie pipe during placement by keeping the pipe full of concrete at all times. This is facilitated if the hopper capacity is at least equal to the volume of the pipe. When initially charging the tremie pipe a wad of empty cement bags or a foam rubber plug known as a pig may be stuffed into the pipe to keep the flow under control while the first concrete forces the plug down the pipe and displaces the water. The pig will float out and rise to the surface. The discharge opening must be kept well immersed in the placed concrete, allowing flow from within the placement. 1.5 metres (4.9 ft) of embedment should be maintained as a minimum if possible. This can be measured by finding the level of the concrete surface below the top of the pipe with a weighted tape and subtracting from the known length of the tremie pipe. It is critically important to concrete quality that the tremie pipe discharge remains well embedded in the concrete. As the pour progresses, if flow slows or stops, the discharge opening is raised so that the head in the pipe can maintain flow. Continuous flow is desirable if possible.If it is necessary to move the tremie pipe laterally, it is better to lift it out vertically, plug it and start a new pour at the new position than to drag it sideways through freshly placed concrete. If the area of the pour is too large to manage from a single point, it is better to use several tremie pipes in parallel than to shift a single tremie pipe around. A spacing between tremie pipes of between 3.5 and 5m, and a distance of about 2.5m from the formwork has been recommended. The risk of segregation and uneven setting can be minimised by providing a continuous flow of concrete through all the tremie pipes to maintain a moderately even surface. For any advice about selection of tremie pipe, please email us