paperworks in acdc - PCPI.docx

7/27/2019 paperworks in acdc - PCPI.docx

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REPUBLIC OF THE PHILIPPINES

POLYTECHNIC UNIVERSITY OF THE PHILIPPINES

TAGUIG CAMPUS

General Santos Avenue, Lower Bicutan, Taguig City

In partial fulfillment of the requirements in

ECEN 2014 (AC/DC Machineries)

Submitted by:

CAPONES, Clariza B.

CARILO, Jonathan

FRAGO, Christopher

HERNANDEZ, Julius A.

LABRADOR, Reymart E.

Submitted to:

Engr. Reginald Raquiza


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History of Ready-Mix Concrete

The term ready mix concrete refers to a type of concrete that is manufactured in

a batching plant or factory according to a specific formula and is then delivered to a

work site by truck-mounted transit mixers. Although the first load of ready mix concrete

was delivered to a building site in Baltimore, Maryland, in 1913, the early ready mix

plants appeared in the 1930s when the standard of practice was for contractors to mix

concrete at the work site from bagged cement and aggregates delivered separately.

The ready mix concrete industry expanded significantly in the 1960s. Modern ready mix

concrete is made under computer-controlled conditions. This results in specialty

mixtures designed for very specific purposes. The use of ready mix concrete allows a

precise recipe to be delivered to the work site. This eliminates the need for an on-site

concrete mixing plant and the need for storage space for the materials to make concrete

at the site. Ultimately, the use of ready mix concrete reduces noise and labor costs and

can improve air quality at the work site.

The concrete is delivered freshly mixed and in a plastic state from a centrally

located batching plant that can serve a wide area. This is an advantage as the plant can

be located, for instance, in an industrially zoned area and make deliveries to residential

districts or into congested city work sites. However, when the materials are combined at

a batch plant, the mixing begins at the plant so travel time from the plant to the work site

is critical. Batch plants cannot be too far away from the site. The concrete should be

placed within ninety minutes of being mixed. The weight of concrete is 1,776 kg/cubic

meter (3,915 lbs/cubic yard) for general purpose concrete, and means that the transit

mix truck is 33 tons for a normal 7.6-cubic-meter (10-cubic-yard) load. Therefore,

concrete manufacturers strive to keep transportation distances to a minimum to avoid

hauling heavy loads great distances.


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History of Pacific Concrete Products, Inc.

Founded in the year 1950s, Pacific Concrrete Products, Inc.s first product to

manufacture was hollow blocks made from granolithic materials. Then not for long, they

later introduce concrete hollow blocks. After three decades of producing quality

concrete products wherein they have achieved not only acceptance but leadership in

the field of cement tile, granolithic and concrete pipe manufacturing, the company

embarked on the production of Ready Mix Concrete in the year 1989.

At its onset, all the big subdivisions being developed near the Ready Mix Plant site in

Brgy. Malhacan, Meycauayan, Bulacan were supplied by their company. There was the

Metrogate Subdivision in Brgy. Malhacan, Meycauayan; the Philiville Subdivision Phase

I, II, II, & IV in Brgy. Sto. Nino, Meycauayan; the Moldex Subdivision in Marilao,

Bulacan. Other subdivisions being supplied by PCPI were the Palmera Development in

Fairview, Quezon City, Active Realty Subdivision in Marilao, Bulacan. Among the other

projects undertaken by our Ready Mix Company was the Navotas Fishpoint expansion

project; the PLDT expansion project in Malolos, Bulacan being undertaken by the

Electronic Telephone Systems, Inc. (ETSI); the PLDT expansion program in Binondo,

Novaliches and Commonwealth Avenue also being undertaken by ETSI.

Due to their consistency and track record in asphalting roads, PCPI has been given the

AAA (Triple A) rating of the Philippine Contractors Association Board, the highest

rating given, and is qualified by the government to undertake the biggest and largest

Road Projects.

The MERALCO transmission line expansion project from Valenzuela to Meycauayan to

Bocaue, the Manila Hotel Veranda expansion projects, the PLDT shipyard and drydock

in Navotas and several other Road Project in Malabon, Navotas, Valenzuela,Meycauayan and Malinta, Bulacan.

.


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Products

Asphalt

Pacific Asphalt and Concrete Mix offer a wide range of cost effective, high performance

asphalt products that can be used on major highway systems, driveways, parking areas,

or rural country roads. Designed for consistency and reliability, our asphalt

products can be tailored to cater for different weight loads, traffic volumes, and weather

conditions.
http://www.cemex.co.uk/asphalt.aspxhttp://www.cemex.co.uk/asphalt.aspx


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Ready-mix Concrete

Concrete is the second most consumed product in the world after water! As market

leaders in concrete production, Pacific Asphalt and Concrete offer a wide range of

products and solutions.
http://www.cemex.co.uk/concrete.aspxhttp://www.cemex.co.uk/concrete.aspx


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Aggregates

Aggregates are composed of geological materials such as stone, sand, and gravel and

are used in virtually all forms of construction. They can be used in their natural state or

can be crushed into smaller pieces.
http://www.cemex.co.uk/aggregates.aspxhttp://www.cemex.co.uk/aggregates.aspx


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Concrete Pipes

From our extensive range of products, our clients can avail an utmost quality

assortment of Concrete Pipes. They can avail the range in various sizes and lengths to

meet their application requirements. Further, for the fabrication purpose of the range,

we have used the best quality raw material that is procured from most trusted vendors

of the industry.


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Hollow Blocks

Concrete Hollow Blocks are a new innovative technology in the building infrastructure.

These concrete hollow blocks are a better substitute to work faster and faster to build a

structure long lasting value.


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Company Profile

Vision Statement

To be the Top Construction Materials and Construction Company in the eyes of our

customers, shareholders, and in the communities we do conduct our business.

Mission Statement

To become the best company in the country producing products and services of the

highest engineering and product standards at the best value and provide the best

returns on the investment of our shareholders investors as well as the best value of our

stakeholders and partners.

Quality Policy

The company (PCPI) its managers, supervisors, and all its employees through the

Quality Managements Committee are committed to the quality of our products and

services and our stated quality goals towards Customer Satisfaction.


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List of officers

Engr. Eresto Vergara

Construction Superintendent

Engr. Cesar Reyes

Contract Manager

Eureka Ycasiano

Chief Accountant

Engr. Ramir Vinzon

Plant Manager (Asphalt)

Engr. Lorenzo Lim

Plant Manager (Concrete)

Engr. Norberto Isleta

Plant Manager (Concrete)


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Location

Pacific Concrete Products, inc. (Asphalt)

Malhacan, Meycauayan, Bulacan

Pacific Concrete Products, inc. (Concrete)

Km. 19 East service Rd. Malhacan, Meycauayan, Bulacan

Pacific Concrete Products, inc.

Km. 17 East Service Road South Super Highway, Paranaque


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Ready Mix Concrete Process

Storage of Materials

Compartment


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Aggregates

The raw materials, coarse and fine aggregates are placed in the compartment. These

materials are being fed manually to the ground hopper.

After the materials were fed to the ground hopper, these aggregates will be weighed by

the aggregate weighing bin. Air cylinders will open the bin and the aggregates will come

out to the horizontal conveyor which in turn will convey the weighed coarse and fine

aggregates to inclined Conveyor. The inclined conveyor bin will then convey the

weighed coarse and fine aggregates to the aggregate transfer bin. The purpose of this

aggregate transfer bin is for storage on top of the mixer.

Cement

Cement is generally stored in silos. The loading of cement is done with the help of

pneumatic blower systems either installed on bulk carriers or a separate system

available at the plant. If baggage cement is used then the cement is loaded using a

compressed air loader and a splitter unit.

Cement is weighed separately, and is transported from the silo into a mechanical

or electromechanical weigher by means of a screw conveyor.

.


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Water

Wateris generally stored in tanks located close to the plant. It is accurately measured

by a water gauge and microprocessor controlled system. The plants have recorders that

measure the moisture present in sand while the entire batch flows past. A recording unit

calculates the average moisture value of the sand and passes on the information to

the batching control unit to allow corrective action to be taken.

Consistency of the mix is checked by a remote recording system. If concrete is very dry

(stiff) the electrical resistance of the batch is measured and if the concrete is wet themotor output is measured. Accurate maintenance of the workability (consistency) of

one cubic meter batch of concrete may depend on as little as one litre or less of water .It

is scarcely conceivable that such a production process could be controlled without

actually measuring the workability and later correcting the consistency.

Mixing Arrangement

The power mixer sets in motion the materials positively. The materials get thoroughly

mixed by rotating arms. These mixers have shortermixing time, give

betterhomogeneity, consistency and strength to the concrete.


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Control Systems

Almost all imported production plants offer automatic systems for control functions. hese control

are operated from main desk. It also has material availability monitor and printer plus an additio

batching monitor. The entire plant can be operated by just one person.Microprocessor control

besides having fully automatic running facility offers number of additionalfeatures like statistical

data recording and processing, a printer unit, moisture adjustmentarrangement, customer

address, memory etc.All you need to do is push the required mix template into the slot and pres

the "start" buttonand the control system does the rest. Aggregate and cement weighment,

moisture correction, overruncorrection and additive weighment are done accurately to give the

concrete mix of desired strengthand workability.The built in trouble shooting programmes are m

valuable and have a high reliability factor.Even upto 1500 mixes of different types can be stored

along with names and addresses of theconsumer and other data which is required to be stored

the computer for operation of the plant.The mix data with quantity can

be if required printed by the printer which is very useful for invoicing the consumer for the

concrete supplied to them.

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