What is a tremie pour?
A tremie is a pipe that can be used for pouring concrete below ground level, often underwater. Common applications include piling works, basements, diaphragm walls, caissons, underwater foundations, and so on. A tremie is made of rigid metal or plastic tubes, generally with a diameter ranging from 20 – 30 cm.
How does a concrete tremie work?
Tremie concrete refers to placement by gravity feed from a hopper through a vertical pipe extending for above the surface to the underwater floor. As concrete flows from the bottom of the pipe, more is added to the hopper so that the tremie pipe is continuously charged with fresh mix.
What is tremie construction?
A tremie is a watertight pipe, usually of about 250 mm inside diameter (150 to 300 mm), with a conical hopper at its upper end above the water level.
What is tremie grouting?
DESCRIPTION. EUCO TREMIE GROUT is specially designed for use in underwater grouting applications. This highly flowable, cement based, non-shrink grout remains in a cohesive, well blended mix when placed or pumped in off-shore concrete repairs.
What is the maximum height through which concrete can be poured?
As per clause 13.2 of IS 456: 2000, the maximum permissible free fall of concrete to avoid segregation may be taken as 1.5 m or 150 cm. Segregation: Segregation can be defined as the separation of the constituent materials of concrete.
What are the different methods of underwater concreting?
Following are the methods of underwater concreting:
- Tremie method.
- Pumping technique.
- Hydro valve method.
- Pneumatic valve method.
- Skip method.
- Tilting pallet barge method.
- Preplaced aggregate concrete.
- Toggle bags method.
What is pump mix?
The ideal concrete mix for pumping typically contains air-entraining agents, a little extra sand (compared with a standard concrete mix), often some fly ash, and a well-graded aggregate blend.
What is a concrete buggy?
A powered buggy, or concrete buggy, is originally used for transporting, spot pouring and spread dumping concrete. However, these powered buggies are also used for other material handling jobs that can include construction debris removal, landscaping, or on-site tool and equipment transportation.
Can you spray cement?
Sprayed concrete is the method by which concrete is sprayed into place, rather than the more conventionally used pouring or placing into formwork. According to the Sprayed Concrete Association other terms used include Gunite, Shot Concrete and Shotcrete. There are many applications and uses for sprayed concrete.
What is concrete washout and how does it work?
Concrete washout is a designed structure in a designated area of a construction site, where all slurry concrete is washed and removed from construction equipment. Concrete washout prevents slurry concrete from leaving construction sites, thus preventing stormwater pollution.
Is a concrete washout area with silt fencing enough?
Nowadays, we know that a designated concrete washout area with silt fencing is simply not enough to effectively contain the contaminants of concrete in an environmentally friendly manner.
How much concrete does a concrete washout containers hold?
Our rampless concrete washout containers hold up to six cubic yards-nearly 400 gallons of additional concrete washout compared to our ramped washout containers. This equivalates to the capacity for concrete washout from approximately 450 yards of poured material or containment for approximately 45 trucks-enough to handle a job of any size!
What is the pH of concrete washout water?
Concrete washout water (or washwater) is a slurry containing toxic metals. It’s also caustic and corrosive, having a pH near 12. In comparison, Drano liquid drain cleaner has a pH of 13.5. Caustic washwater can harm fish gills and eyes and interfere with reproduction. The safe pH ranges for aquatic life