Crushing & Grinding Machines

Demolition of Concrete Structures Concrete Construction

Jan 01 1987 0183 32 Productivity can vary greatly depending on hammer size type of concrete amount of reinforcing and working conditions PRESSURE BURSTING This method of demolition can be classified into two categories mechanical and chemical bursting...

Concrete Bursting

Do you have a project that requires quiet and controlled demolition MB Diamond Drilling Ltd offers hydraulic bursting - the ideal solution for removal of large concrete structures like foundations pillars or concrete walls By drilling holes in the structure and inserting the tool head concrete structures are easily removed with the simple application of hydraulic pressure which can be...

Investigation and Improvement of Bursting Force Equations

In posttensioned concrete members the high local stress under the anchorage causes transverse tensile stress Therefore it is very important to predict the bursting force to determine appropriate reinforcement details In the present work the existing equations of the bursting force for the anchorage zone were evaluated and an equation for the bursting force based on finite element analysis...

Concrete Bursting Systems Birmingham from EMDD Universal

Concrete Bursting Systems are for the removal of foundations pillars machine bases and concrete walls over 320 mm thick Up to 320mm it is usually more economical to crush where both faces are accessible The system consists of a high pressure bursting piston...

Guideline for Pipe Bursting

Pipe bursting is a well-established method for trenchless replacement of pipe throughout the world Pipe bursting was first developed in the UK in the late 1970s by D J Ryan Sons in conjunction with British Gas for the replacement of small-diameter 3- and 4-inch cast iron gas mains...

Concrete Bursting

Concrete bursting is used for projects where relatively quiet dust-free and controlled concrete removal and demolition is important The process works by applying directional forces against the inside of holes drilled into concrete and is perfect for jobs that other concrete removal methods are capable of However rather than shattering concrete into bits as dynamite and impact tools would...

What are the three major types of reinforcement used in

iii Bursting Reinforcement Tensile stresses are induced during prestressing operation and the maximum bursting stress occurs where the stress trajectories are concave towards the line of action of the load Reinforcement is needed to resist these lateral tensile forc...

Concrete Bursting Splitting

What is Bursting Concrete bursting involves a hydraulic motor which powers a burster head or ram Holes are drilled into the concrete in the area that needs to be removed These holes range in size from 115mm to 200mm in diameter Once these holes are drilled the burster head is...

Pipe Bursting Various Types Of Pipes Underground

The most common types of gravity sewer pipes burst and replaced are vitrified clay pipe VCP asbestos cement AC concrete pipe CP and PVC With a properly designed pipe bursting system materials such as reinforced cement pipe RCP and even brick can be burst very successfully...

Concrete Bursting across East Anglia Drill Masters

Concrete Bursting Concrete Bursting by Drill Masters Is a safe efficient method of removing reinforced or mass concrete Ideally used in office blocks residential buildings or hospitals where large chunks of material need to be removed quietly and free of vibration...

Chemical Demolition No Fuss No Muss Aggregate

Concrete Demolition Expansive Chemical Demolition When you think concrete demolition sights and sounds of big whirring saws and blades come to mind While it is often the case that heavy equipment has to be brought out to accomplish demolition there is an increasing demand for the use of chemical demolition agents on construction sit...

Concrete Demolition

Mar 01 2011 0183 32 Common concrete demoltion methods include bursting breaking dismantling ball and crane or explosiv Special equipment is used when removing concrete sometimes these are hand tools some times they are power tools...

Concrete Bursting Concrete Demolition Company Robore

Concrete Bursting Demolishing large concrete structures concrete bursting utilizes a series of holes that are cored in the concrete structure to create weak points Concrete Bursting Applications Foundations Pillars Barrier walls Concrete walls As a quiet...

Chapter 16

In most bursting applications the old pipe is made of a rigid material such as vitrified clay pipe VCP ductile iron cast iron plain concrete asbestos or some plastics Reinforced concrete pipe RCP was successfully replaced when it was not heavily reinforced or if it was substantially deteriorated The diameter of the old pipe...

Hand arm vibration

Bursting concrete instead of breaking The task Demolishing concrete structur The problem During the renovation of a large warehouse a temporary concrete retainer was built to support the external walls while the floors were removed and replaced When the structural work was complete the retainer which was 1 m x 1 m in section and ran...

Bursting Forces in Reinforced Concrete Columns

Bursting forces in columns are caused by cranked vertical reinforcement Although these bursting forces are well documented few Codes of Practice deal with the effects adequately British South African and American Codes are critically evaluated in this regard An equation is developed to determine the amount of bursting steel required which is in the form of column ti...

CONCRETE BURSTING

Concrete Bursting is designed for the removal of walls over 300mm thick A series of holes are drilled in to the concrete and a high pressure bursting piston is inserted in to the pre-drilled holes delivering pressure of up to 250 tons The piston pushes against the concrete...

Stresses Strains and Bursting Cracks in Anchorage Zones

Discusses the stresses strains and development of bursting cracks at the end block anchorage zones of post-tensioned prestressed concrete beams It covers the two stages of loading namely the longitudinal prestressing loading stage and the additional transverse loading at the third span point applied during the beam testing stage...

Concrete bursting Ace of Diamonds Ltd

Concrete bursting and crunching in Devon Cornwall the South West and surrounding areas Ace of Diamonds Ltd offers a fantastic service for removing concrete in a way that works for you creating less disruption and inconvenience on your building site so you can carry on with the job in hand...

Concrete Bursting

Concrete Bursting is the controlled demolition technique which is very effective for the removal of mass concrete or for greatly reducing the force needed using conventional means This method is used in conjunction with diamond core drilling powerful hydraulic rams are inserted into pre-drilled holes and the rams are expanded until cracks are...

STANDARD SPECIFICATIONS PIPE BURSTING SYSTEM

New pipe towed or jacked in immediately behind mole or bursting head B Host Sewer Main Existing pipeline subject to pipe bursting system made of vitrified clay asbestos cement polyvinyl chloride PVC cast iron concrete steel or lined pipe C Replacement Pipe Pipe inserted into host sewer main by pipe bursting system...

Bursting of concrete after stressing

The concrete bursting locations are at the pour strip located at the one-third of the fourth spanThe tendon spacing is around 12 m Anchorage size is 90 x 300 5 T 13 rectangular 300 x 120 closed links with 70 mm c/c were provided just behind the anchorag Thanks for your advice Now we are using 5 strands tendon per anchorage but later I...

High strength columns and normal strength slabs

The Concrete Society Technical Report 64 Guide to the design and construction of reinforced concrete flat slabs states that Where the concrete strength in the slab is less that 70 of that in the column bursting effects within the slab depth should be considered These bursting effects can be resisted by the use of special confinement...

GRUNDOCRACK® Pneumatic Pipe Bursting TT Technologies Inc

The Grundocrack can be used to burst fracturable pipes cast iron clay concrete RCP ABS and some plastics with diameters between 4 and 54 inch Expand Your Pipe Bursting Knowledge Each tool is effective in bursting a wide range of pipe diameters through the use of a variety of expanders...

BURSTING STRESSES DUE TO PRESTRESSING TENDONS IN

bursting stresses due to prestressing tendons in curved ducts technical note open pdf proceedings of the institution of civil engineers e-issn 1753-7789 the analysis of prestressed concrete structures and the application of recent research structural paper no 51...

GRUNDOCRACK® Pneumatic Pipe Bursting TT Technologies Inc

The Grundocrack can be used to burst fracturable pipes cast iron clay concrete RCP ABS and some plastics with diameters between 4 and 54 inch Expand Your Pipe Bursting Knowledge Each tool is effective in bursting a wide range of pipe diameters...

HYDRAULIC CONCRETE BURSTING

Where concrete has to be removed in occupied areas where noise and vibrations are an issue hydraulic bursting can greatly assist in cracking the large areas of concrete to assist in the removal Holes are diamond drilled into the concrete at 48mm dia or 112mm dia and hydraulic pistons inserted...

End Zone Reinforcement for Pretensioned Concrete Girders

pretensioned concrete girder is a func-tion of the location and magnitude of the prestressing strands the degree of bond between strands and the sur-rounding concrete the amount of strand draping in the end zone the section geometry and the concrete material properti Once the concrete cracks modeling the cracked end zone becomes more...

Asbestos Cement Pipe Why It s a Problem and How

Aug 11 2017 0183 32 Pipe bursting only requires two small wells dug at the beginning and end of the line One hole allows insertion of the breaking tool and new line The other allows for retrieval of the device and any old pipe pieces it pushes out Of course this helps to limit the number of asbestos...

Concrete Demolition

Common concrete demoltion methods include bursting breaking dismantling ball and crane or explosiv Special equipment is used when removing concrete sometimes these are hand tools some times they are power tools...