Civil boost

 Tremix concreting method is the method of removal of surplus water from the concrete to maintain optimum water-cement ration by vacuum system. In this method, excess water is removed from fresh concrete by vacuum dewatering technique. Equipment used in tremix concreting Vacuum pump  Top cover Filter pads and Power trowel  Vacuum pump runs on electric motor or petrol engine and is fitted with a ring liquid pump. Top cover also called vacuum mat consists of two suction mats 6m x 7m. Filter pads restricts the particle of concrete to enter in pump. Procedure of tremix concreting   At first, concrete is placed on the site by common concreting procedure like placing, leveling, compacting etc. After compaction of concrete surplus water is appeared on the upper surface of concrete floor. Filter pads are placed on the fresh concrete leaving about 4 inches of fresh concrete exposed on all sides. The top cover is then placed on the filter pads and rolled out till it cover...

   Now a days, the use of  Ready Mix Concrete (RMC) in large construction work has been continuously increasing. RMC is a concrete that is scientifically manufactured in batching plant and transported to the site by transit mixer without affecting its fresh properties.   The transit mixer is of two types - In one type, dry concrete is made at the batching plant, loaded into agitator truck mixer and water is added during transportation. Thus wet concrete is formed. In the other type, mixed wet concrete is made at the batching plant discharged into the agitator truck mixers and transported to the site. The drum in concrete is made to rotate till the concrete is placed to keep the concrete in plastic state. Procedure  The raw materials are tested in the plant before its use to ensure compliance with relevant standards. This eliminates the possibility of quality problems in the end product. The aggregates of different sizes are stored in separate bins and mixed in d...

    In the case of basements, sewerage and marine works, concrete needs to be placed under water. In this situation, a special type of concreting method is used which is called Tremie method. What is tremie?   A tremie is a water - tight pipe having diameter of 200 - 250 mm. It has a funnel - shaped hopper at its upper end and a loose plug at the bottom for discharge end. Tremie pipe is supported by a crane above the water level which is also used to lift up the pipe. It is easy to adjust the length of tremie pipe. What are the procedure of tremie method? Tremie method includes following procedure - At first, the tremie pipe is taken below the water, closing the bottom end with plug, by crane. Then it is made to rest at the point where the concrete has to be placed. After that, concrete having slump about 15 to 20 cm is poured into the funnel. When whole length of pipe is lifted up using power hoist. It is lifted up such that the bottom end of pipe lies inside the concret...