Report of Concreting Equipments

8/3/2019 Report of Concreting Equipments

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CONCRETING EQUIPMENTS

Concreting equipments are those equipments which are used for manufacturing, transporting

and for construction purposes

TYPES OF CONCRETING EQUIPMENTS

1 .Production equipments:-These are the equipments which are used in manufacturing of

concrete.

Eg:-concrete pumps.

2. Transportation equipments:_These are the equipments which are used for effective

placing and transportion of concrete.

Eg:-wheel barrows, transit mixers.

3. Mixing equipments:-These are the equipments which are used for mixing the concrete to

form a homogeneous mixture.

Eg:-concrete mixers ,concrete grinders.

4 .Compacting equipments:-These are the equipments which are used for compacting the

soil to the desired limit to increase the shear strength of soil.

Eg:-vibrators.

CONCRETE PUMPS

y Concrete pumps are those equipments which are used for pumping liquid into the surface.y These are used mainly for high elevated structures.y It can also be used for long span beams.

There are mainly two types of pumps:-

y The first type of concrete pump is attached to atruck. It is known as a trailer-mountedboomconcrete pump because it uses aremote controlledarticulatingroboticarm (calledaboom) to place concrete with pinpoint accuracy. Boom pumps are used on most of the largerconstruction projects as they are capable of pumping at very highvolumeand because of the laboursaving nature of the placing boom. They are a revolutionary alternative to truck-mounted concrete

pumps.


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y The second main type of concrete pump is either mounted on a truck and known as a truck-mounted concrete pump or placed on atrailer, and it is commonly referred to as aline pumportrailer-mounted concrete pump. This pump requiressteelorrubber concrete placinghosesto bemanually attached to the outlet of the machine. Those hoses are linked together and lead to

wherever the concrete needs to be placed. Line pumps normally pump concrete at lower volumes

than boom pumps and are used for smaller volume concrete placing applications such asswimmingpools and single family home concrete slabs and most ground slabs.

Fig no:-1

This figure shows a foldable concrete pump which is used now a days at the

site since it is beneficial and affordable.

In this type of concrete pump the pump is installed in the truck and it is used at

the site according to the requirements and hence can be folded at the site

after the use thus reducing the consumption of space and effectively can be

taken to the other place where it is required.

.


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CONCRETE MIXER

1 .A concrete mixer is a device that combines cement, aggregate(fine and coarse) and water to

form a homogeneous dense mixture.

2. A typical concrete mixer uses a revolving drum to mix the components.

3. Concrete portable mixers are often used for smaller volume works.

Fig no:-2

This figure shows a half bag concrete mixer which can be used by hand and was used in the

traditional days before.


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There are mainly four types of concrete mixers.

1.Rotating non tilting type mixers:-In this type of mixer the drum rotates around the loading

skip which is pulled up or lowered by means of a wire rope and pulley movement.the discharge

chute at the other end unloads the mix when it is manually dropped to allow the mixed

concrete to drop.These have higher capacities than tilting pipe.

2.Rotating tilting type:-in this type of mixer the drum is conical and revolved around an inclined

axis.the mixing is carried at an angle of 20-30 degrees. It is charged by means of skip.

3.Pan type:-in this type of mixer the drum is stationary or free running with the blades rotating

around the vertical axis.these mixers are very efficient as mixing process is very faster and

spraying of water is very uniform.

4.Paddle type:-the paddle mixers consist of a cylindrical non rotating open through in which

materials are mixed by paddles rotating around the horizontal axis on one or two shafts.

CONCRETE BATCHERS

The measurement of material for making concrete is known as batching.

There are two types of batchers:

1. Volumetric batcher.

2. Weigh batcher.


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VOLUMETRIC BATCHER

1 .Volumetric batcher: Volumetric batching is not a good method for proportioning the material

because of the difficulty it offers to measure granular material in terms of volume.

For volumetric batching it is convenient to make steel or wooden boxes of convenient sizes and

volumes. The volume of one bag is taken as 35 litres. These boxes are used for measuring fine

and course aggregates.

Fig no:-3

This figure shows a concrete volumetric batcher.

This batching is not efficient as the materials are measured in terms of volume.so now a days

weigh batching is used.

WEIGH BATCHER

Weigh type of batching is preferred. In this type of batching all the ingredients of concrete are

weighed in the given proportion in weigh batcher. The head load of material is dumped into theweighing pans by the workers. This type of dumping causes an impact at regular intervals on

the weighing mechanism.

Care is also taken to ensure that the workers dump one type of aggregate in the weighing pan

at a time.


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TRANSIT MIXERS

Special concrete trucks are used to mix the concrete at the site.

The interior of the drum is fixed with a spiral blade.

In one rotation the concrete is pushed into the drum and this is direction where

concrete is to be discharged. When concrete is produced from batching plant it is

generally produced by transit mixers. The transit mixers are truck mounted having

a capacity of 4 to 7 m^3.

Fig no:-4

The above figure shows the transit mixer which can be used to transfer the materials to the

site.

These equipments are very effective as the mixing process can also be carried out during the

transportation process.

In construction of 50 km compound wall setting up of a batching plant even at the centre of the

site would not be effective and economical. At that time transit mixers can be used to mix the

concrete during transportation itself and transport to the required site thus providing the

economy as well as space.


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WHEEL BARROWERS

A wheel barrow is a small hand-propelled vehicle, usually with just one wheel designed

to push the ancient wheelbarrow by wind.

It is designed to distribute the weight of load between the wheel and the operator.

Convenient carriage of heavier and bulkier loads is possible with wheel barrow.

For long distance transportation concrete may get segregated. To avoid segregation

wheel barrows provided with shock absorbers.

Fig no:-5

The above figure shows the diagram of a wheel barrow which can be used for transferring the

materials to the required position. Since it is equipped with a roller support is is quite

convenient method of transportation for smaller volume works.

The other means of transportation are chute, skip and hoist, crane bucket and ropeway and

belt conveyors which can be used accordingly to serve the purpose.


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VIBRATORS

The process of removal of entrapped air and uniform placement of concrete to form

homogeneous dense mass is known as compaction.

Vibration is one of the processes to carry out vibration for uniform settlement of thesoil particles.

Compaction is required to improve the shear strength of the soil.

The presence of even 5percent voids may reduce in the strength of soil by about30

percent.

Compaction can be carried out by vibration, pressure and jolting, spinning.

Vibration is carried out by :-

1 .Needle vibrators:-These are widely used in construction industry such as dimensionaccuracies , corrosion resistance , high operational fluency and for longer services.

These are manufactured with high quality materials.

Fig no:-6

The above figure shows the needle vibrator of dynapac company which can be used in

construction purpose.


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VIBRATING BEAMS

*Interchangeable bottom plates make this light finishing beam versatile.

* 5 different working widths: 1.8, 2.4, 3.0 and 3.6 m.

* Simple operation thanks to an adjustable-in-height twin handle.

*Foldable handle for easy transport.

* Adjustable centrifugal force for operation on different types of concrete.

ADVANTAGES:-1. Light and very convenient to operate.

2. Intended for floor finishing and correcting operations.

3. The articulated handle for smooth rotation forward and backward.

VIBRATING SCREEDS

A wide choice of compaction beams with the BM/BR double vibrating beams and BT90

modular screeds, combined with BV finishing beams (single or twin-handle) .

Double and finishing beams are electrically or petrol driven.

The modular screeds are available as pneumatic, electrically or petrol driven.

CONCRETE POWER TROVELS

1. BG221 power trowels cover most of the trovelling applications.

2. The BG21 power trovels edge up to the double ride-on trowels.

3. Both petrol and electric versions are available for all single trowels.


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CONCRETE POKER VIBRATOR

Especially designed for medium to high slum concrete the range consists of three different

diameters 40, 50, 60 mm.

With a light weight aluminium switch box, it is easy to operate with one hand.

ADVANTAGES

1. Simple operation thanks to an adjustable in height twin handle.

2. Foldable handle for easy transport.

3. Adjustable centrifugal force for operation on different types of concrete.

Fig no:-8

The above figure shows the sketch of a poker vibrator which can be used for light and medium

slum.

CONCRETE GRINDERS :-

1. Combined diameter 350/450 mm in one machine.

2 .Equipped with a 13 hp Honda petrol engine or a 7 hp Lombargini diesel engine.

3. A fork-watering device, i.e constant cooling of the diamond disk on both sides,

improved evacuation of dust and waste while in operation.


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COMPARATIVE STATEMENT OF CONCRETE PUMP TAKING DIAMETER OF

DELIVERY CYLINDER AS COMMON FACTOR

The above comparison chart shows the five different products of DYNAPAC company.

For our project I would prefer to useHBT80S-16 because it can handle more amount of pressure

as well as delivery distance is more and overall weight is more for this pump.

HBT60S-

9

HBT60S-

13

HBT60S-

16

HBT80S-

13

HBT80S-

16

Low

pressure m/h 60 60 60 80 80

High

pressure m/h 36 36 35 47 46

High

pressure Mpa 9 12.5 15.7 12.5 15.7

mm

125/80

1650

125/80

1650

140/90

1650

125/80

1650(18

00)

140/90

1650(18

00)

mm

Kw 75 90 110 110 132

L

m

Kg 5000 5000 5200 5200 5500

Max.

Delivery

distance m 600 700 1000 700 1000

7.6

Item Unit

S valve concrete pump

Theoretic concrete

delivery volume

Theoretic

concrete9.6 7.6 9.6delivery

pressure

Lowpressure Mpa 5.7

Overall weight

32

Main oil pump Original German Hawe , Rexroth and Japanese Kawasaki

Main cylinder dia./pole dia

stroke

Diameter of delivery cylinder 200

Hydraulic pressure Mpa 26 32 32 32

Electric motor power

Capacity of hydraulic oil tank 500

Hopper capacity 0.6

250

Horizontal

Vertical m 150 180 250 180

Report of Concreting Equipments

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