Tremix concreting method

 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

  1. Vacuum pump 
  2. Top cover
  3. Filter pads and
  4. 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 covers the strips of exposed concrete on all sides.
  • After that, the top cover is connected to the vacuum pump through a suction hose and the pump is started.
  • The pump creates vacuum between the filter pads and the top cover. Due to this, atmosphere pressure compresses the concrete and the surplus water is squeezed out.
  • Immediately after vacuum dewatering, the flatness of concrete surface is checked and adjusted with a control tool.
  • Then finishing is done with power trowel.

Advantages of tremix concreting method
  • It increases the strength and abrasion resistance of concrete.
  • It minimizes the shrinkage & floor wraps.
  • It prevents the bleeding  of concrete.
  • It lowers the water content in the concrete by 15-25%.
Uses of tremix concreting 
  
  It is broadly used in industrial flooring, parking decks and bridges. It is preferable at the places where the surface is in contact with impact loading.

Thank you


Comments

Post a Comment

Popular posts from this blog

What is PVC ? What are the advantages of it as a construction material ?

Image
  PVC - Polyvinyl chloride It is a vinyl polymer which structure is very much similar to polythene. It is produced by the free radial polymerization of vinyl chloride. In the recent years, the use of polyvinyl chloride has been increase in construction work due to their excellent property. It is resistance to fire, water, flame, and corrosion. It has light weight and great insulating property. As a building material, PVC is cheap and easy to assemble. It has become an alternative of conventional building materials like wood, concrete or clay. Advantages of PVC - Being a resistance to water, it is used to make shower curtains, water pipes etc. Being a hard plastics, it is used in window profiles, pipe, plumbing etc. It is extensively used in sewer industries for pipelines of the water. It is flexible. After addition of plasticizers, we can use it as roofing membranes and in electric cable insulation.  Thank you. Gracious! My Quora space My YouTube channel
Read more

Lug angle and tension splice - Introduction

Image
  Lug angle - Lug angle is an angle section of short length which connects the outstanding legs of angle section or member to the gusset plate.  It reduces the length of connection to the gusset plate and also reduces the shear lag effect.   When the lug angle is used, the unconnected length of main angle acts like a connected leg and hence entire cross-section area start resisting the tension. Thus, shear lag effect reduces and efficiency of the tension member increases.   Lug angle provides extra gauge line to accommodate the numbers of bolts.   Tension splice - Tension splice are the cover plates used on both sides of butt jointed members. A tension member is spliced when the length of section available is less than that of tension member required. when the members of different thickness are spliced, packing is required to fill the gap. The area of splices should be slightly more than that the member joined. It is also used when the size of the memb...
Read more

Difference between butt joint and lap joint

Image
  LAP JOINT - In this joint, two members are overlapped and connected together. The load in lap joint has eccentricity because centre of gravity of load in both members are not in same line. Thus, a couple is formed which causes undesirable bending in the connection and the rivets may fail in tension. Also due to the eccentricity, the stresses are distributed unevenly across the contact area between the rivets and members to be connected.   BUTT JOINT - In butt joint, both members are placed end to end and additional plate/plates (cover plate) is provided on either one side or both sides and connected to the main plates. When one cover is provided, it is called single cover riveted butt joint and when double cover is provided,it is called double cover riveted butt joint.   It was the difference between lap and butt joint. Now, we will know superiority of butt joint. Butt joint is superior than lap joint because 1. In the case of a double cover butt joint, eccentricity of ...
Read more