Concrete Pouring Methodology

7/18/2019 Concrete Pouring Methodology

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AMAIA STEPS MANDAUE

METHODOLOGY FOR CONCRETE POURING

SITE PLANNING

o Fresh concrete shall be batched from the approved supplier of

concrete. Concrete will be delivered direct to the site and to be received

by assistant Quality Engineer for checking of the required criteria of

concrete. The assistant QC Engineer will make sure the concrete

delivered is as per the approved design mix for the situated member to

be casted.

o ll data for testing on fresh concrete at site shall be recorded on the

concrete pour card.

PREPARATION

Rebar

!. Fix the reinforcement steel as per the approved drawings" including

number of reinforcing bars" diameter of bars" length of splice and

location of splice.

#. ny loose binder or ties along the spliced reinforcement steel shall be

re$tightened. %end inward the free ends of the binding wire or ties.

&. Ensure that concrete cover is maintained" as per approved plans.

'. (einforcing steel above the level of concrete to be poured shall becovered with any impermeable sheet to prevent excessive laitance.

MEPFS

!. Ensure and coordinate with )E*F+ sta, for any )E*F+ works required

on the area as per approved drawings.

Formworks

!. ny damaged materials used for form work shall not be used.

#. Fix the forms. Ensure that all seals" locks and supports are securely

fastened and tightened.

&. Clean the surfaces using air compressor for dust or any small particles

or deleterious materials that may impair the workability of concrete.'. ll surfaces of forms facing concrete shall be treated with form oil

before concrete will be poured.

-. nstallation of Formworks systems must be inspected and approved by

the technical engineer of the supplier.

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Line and Grade

!. The surveyor will then check the level of the pro7ected top surface of

the slab and place level strips or guidelines if necessary to mark the

exact level.

#. +urveyor will provide a survey report for all structures to be poured.

+urvey (eport must include as$built coordinates and elevations of the

forms" prior to concreting.Concreting

!. The concreting must be arranged with necessary equipment or toolsfor concreting use such as vibrators" power 8oat machine" shovel etc.

Safety

!. ll works shall comply with safety procedure or instruction set out in

pro7ect safety plan.

#. %asic **E must be worn by all sta, and workers. +killed and unskilled

labor shall need to use safety requirements such as goggles" gloves"

etc

&. *rovide su9cient lighting whenever pouring is done at night.

'. For columns" working platforms with guard rails and lifelines must be

provided.

-. %arricades must be placed along the perimeter of the area to be

poured" particularly for suspended structures.

1. Ensure that exit routes are readily accessible and free of obstruction.






CONCRETE POURING

!. The concrete mixer must be stopped at the check point for the

inspection of slump test and to obtain sample cylinders.

#. Eight sample cylinders shall be taken. Two cylinders shall be tested on

6th" !'th and #:th days. The remaining two cylinders shall be tested

on the &4th and &#nd days" in case concrete fails on the #:th day.

&. ;nload the concrete within <4 minutes from the batching plant loading

time.

'. Compact the concrete properly by using mechanical vibrators" extra

vibrator shall be available in case of any shortage or mechanical

problems. Concrete must be vibrated for !4 to !- seconds before it is

removed and reinserted at another point. The vibrator must be

inserted vertically into the concrete mix.

-. For columns and shearwall" concrete shall be poured in layers with aheight of 144mm per layer. Concrete shall be properly vibrated before

the next layer is poured. The vibrator shall be inserted in such a way

that it reaches the old layer to ensure that the old and new concrete is

integrated properly.

1. For slabs" concrete shall be poured from the farthest location outwards

towards any exit point. Concrete shall be spread using shovel and

mechanical vibrators and shall be leveled to the required elevation

6. For stairs and other inclined structures" concrete shall be poured from

the bottom of the structure to the top to avoid separation of

aggregates.:. =nce concrete begins to set" use the power trowel to achieve a smooth

>nish surface.

<. fter the smooth >nish is achieved" cure the casted area properly by

applying curing compound unto the exposed concrete surface.

!4. Cure the concrete by spraying water three times per day for a

period of 6 days

!!. Concrete pour card shall be >lled by Quality Engineer and shall

be submitted to the Engineer including concrete delivery notes.




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Concrete Pouring Methodology