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Concrete work procedure
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Concrete work procedure
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Table Of Contents
1.0 .
Purpose
2.0 .
Scope
3.0 .
Responsibilities
4.0 . e!inition "
#bbre$iation
%.0 . Concrete
&or's
(.0 . )nspection
*.0 . Sa!et+
)nstructions
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1. PURPOSE
The purpose of this document is to define the procedures for Concrete work and i!
Design at compression station pro"ect
2. SCOPE
The work inc#udes:
Tank $oundations
%&uipment $oundations
Light po#e $oundations
'ui#dings
isce##aneous $oundations
3. RESPONSIBILITIES
It is the overa## responsi(i#it) of the Construction Contractor to organi*e resources to
perform construction activities as per pro"ect specification+ in comp#iance with &ua#it)+
schedu#e and safet) re&uirements.
4. DEFINITION / ABBREVIATION
PROJECT C,PR%--I,N -T.TI,N
OWNER /0.LD. P%TR,L1 C,P.N2
CLIENT %NPPI
CONTRACTOR P%TR,3%T
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5. CONCRETE WORK
5.1 DESIGN MIX
4.5.5 .## concrete mi!es sha## (e designed mi!es in accordance with the
re&uirements of %g)ptian standards and sha## (e su("ect to the conditions
descri(ed in the pro"ect specification.
5.2 MATERIAL
4.6.5 The cement used for concrete+ reinforced concrete+ mortar+ grout 7
p#aster works sha## (e Port#and cement conforming to pro"ect
specification.
4.6.6 The Contractor sha## provide certificates of conformance.
4.6.8 1se cement in se&uence of receipt of shipments un#ess otherwise
directed () the ain Contractor.
4.6.9 Natura# sand or sand prepared from stone+ grave# or other inert materia#
having simi#ar characteristics+ conforming to Qua#it) Documents sha## (e
used.
4.6.4 The aggregates to (e used in the concrete sha## (e procured from a
source known to produce aggregate that is chemica##) inert+ strong+ hard+
dura(#e and of #imited porosit) and free from an) adhering impurities that
ma) impair the strength+ dura(i#it) or &ua#it) of concrete.
4.6.: -amp#ing and testing of coarse aggregate.
4.6.; %ach si*e of the aggregate sha## (e stored separate#) and in a manner
that wi## prevent contamination and intermi!ing. The e&uipment 7 method
of hand#ing the aggregates sha## ensure that the stockpi#es do not suffer
deterioration and contamination.
4.6.< The water used in the preparation of concrete 7 mortar sha## (e c#ean 7
free from in"urious amounts of impurities =Pota(#e water meets this
re&uirement>. The water sha## conform the pro"ect specification?.CI code
re&uirements. The water sha## (e stored in a c#ean container or tank and
sha## (e su("ected to chemica# ana#)sis as per specifications.
4.6.@ -amp#ing and testing of Re(ar () independent #a(.
4.6.5A .## materia#s sha## (e stored and hand#ed in such a manner that wi##
prevent damage or deterioration.
4.6.55 Concrete additives?admi!tures sha## on#) (e used after approva# from the
ain Contractor.
4.6.56 Tria# mi!es sha## (e prepared to determine the mi! proportions necessar)
to produce the strength of concrete as per Qua#it) Documents. %ach mi!
sha## (e prepared to meet the worka(i#it) re&uirements for transporting+
p#acing 7 compacting of the concrete re#ative to the particu#ar situation it
is to (e used.
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4.6.58 The detai#s of the design?proposed mi!es sha## (e su(mitted to the ain
Contractor ? Consu#tant for his approva# and no concreting sha## (e
commenced unti# forma# approva# has (een received.
4.6.59 Preparation of mi! design and its approva#.
5.3 CONCERTING OPERATION
4.8.5 1n#ess otherwise authori*ed () the ain Contractor+ concrete sha## (e
machine mi!ed.
4.8.6 achine mi!ing method and specification sha## (e in accordance with the
pro"ect specification.
4.8.8 .## concrete which is intended for use in structura# e#ements sha## (e
prepared at centra# (atching p#ant specifica##) designed for this purpose.
4.8.9 The concrete sha## (e transported to site in transit mi!ers un#ess
otherwise a##owed () the Contractor.
4.8.4 The concrete sha## (e transported immediate#) after mi!ing and sha## (e
p#aced within the re&uired time according to specifications and the
drawings.
4.8.: No concreting operations sha## (e performed without the written approva#
of the ain Contractor.
4.8.; Prior to p#acing concrete+ air 7 concrete temperatures sha## (e recorded.
4.8.< P#acing of re(ar and formwork sha## (e as per drawing and its get its
approva# from ain Contractor.
4.8.@ .## e&uipment that are necessar) for p#acing concrete i.e. pumps+
vi(rators+ compressors and concrete test e&uipment etc. sha## (e
checked for avai#a(i#it)+ operationa# capacit)+ re#ia(i#it) and ca#i(ration.
4.8.5A $or a## #arge pours+ prior to pouring+ stand() vi(rators+ concrete pumps+
(atching p#ants etc. sha## (e provided for rep#acement in the event of
(reakdown.
4.8.55 During compaction+ vi(ration checks sha## (e made to ensure that re(ar
spacer (#ocks are not disp#aced or dis#odged. Re(ar that sha## (e
e!posed after concreting are protected during the pouring and su("ect to
c#eaning during 7 immediate#) after the comp#etion of the pouring.
4.8.56 .fter p#acing+ compaction sha## (e done thorough#) around a##
reinforcement+ em(edded fi!tures and interna# corners and forms with
interna# vi(rators according to the procedure conforming to Qua#it)
Documents or standards.
4.8.58 Bum(oots sha## (e used for entering into concrete.
4.8.59 Immediate#) after the concrete work has (een accomp#ished+ measures
sha## (e taken to protect the concrete () spra)ing the e!posed surfaces
with a curing compound.
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4.8.54 Curing compound sha## (e approved () the Contractor and as per Qua#it)
Documents.
4.8.5: The concrete face sha## (e checked for comp#iance as indicated in the
Qua#it) Documents or construction drawings. The concrete face sha## (e
c#ean and free from a## foreign matters etc.
4.8.5; $o##ow the correct instructions so that concrete is not damaged or is not
defective.
4.8.5< If some damage or defect e!ists+ conduct inspection of the #ocation "oint#)
with ain Contractor?consu#tant and su(mit the proposed method
statement for performance of repairs and get it approved in writing (efore
commencing such repairs.
4.8.5@ Construction "oints sha## (e constructed e!act#) in accordance with the
detai# shown in the p#ans and the specifications with the (est of
workmanship.
4.8.6A Bet approva# of the ain Contractor (efore introducing such "oints if not
shown on the drawings.
4.8.65 .t #east 9< hours sha## e#apse (efore casting ad"oining concrete.
4.8.66 Construction "oints sha## (e perpendicu#ar to the p#ane of the mem(er.
4.8.68 Continue a## specified reinforcement through "oints.
4.8.69 3oints shou#d (e roughened.
4.8.64 Construction "oints sha## (e c#eaned and grouted with cement mortar
(efore p#acing new concrete.
4.8.6: %!pansion "oints sha## (e constructed as per drawings?specifications.
4.8.6; Cater stops sha## (e fa(ricated and #ocated as shown on the drawings.
4.8.6< Cater stops sha## (e accurate#) cut+ fit and integra##) "ointed at sectiona#
"oints and angu#ar "unctions to provide a continuous watertight diaphragm
at a## points.
4.8.6@ ake ade&uate provision for the support of water stops during the
progress of work.
4.8.8A .nchor (o#ts+ edging ang#es and other misce##aneous meta# em(odiments
in concrete sha## accurate#) (e #ocated and secured in position within
approved to#erance to resist #oads incidenta# to p#acing of concrete.
4.8.85 Derif) a## anchor (o#ts and em(edded items #ocations are as per
construction drawings.
4.8.86 %&uipment sha## not (e insta##ed ti## the approva# of concrete strength ()
ain Contractor ? consu#tant.
4.8.88 In the event of (reakdown of mechanica# e&uipment+ handEfinishing
method ma) (e used to finish the concrete a#read) deposited when the
(reakdown occurs and no additiona# concrete sha## (e p#aced unti# such
e&uipment is repaired to the satisfaction of ain Contractor.
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4.8.89 During hot weather the Contractor sha## take a## necessar) instructions to
ensure that the temperature of the mi!ed concrete does not e!ceed
specified temperature.
4.8.84 These measures sha## inc#ude+ (ut not (e #imited to+ shading of
aggregates+ spra)ing water on aggregates+ #inking the mi!ing water to a
chi##ed unit+ chi##ing the mi! ingredients with ice and when ice is used in
the mi!+ maintain the correct amount of water re&uired.
4.8.8: ReEtempering of concrete or mortar+ which has partia##) hardened+ sha##
not (e permitted.
6. INSPECTION
:.5 Contractor QC team sha## ensure that a## the re#evant work is carried out in
conformance with Pro"ect -pecification+ PQP and ITP.
:.6 ,n each da) when concrete is poured a minimum of si! tests cu(es sha## (e
produced from the same (atch and for ever) 5AA m8 thereafter of as per
specifications.
:.8 The characteristic strength of the concrete p#aced in the formwork sha## (e
determined for ; da)s and 6< da)s () the compressive strength testing of test
cu(es as per Qua#it) Documents.
:.9 /eep a comp#ete record of specimen of test concrete with #ocation and date of
p#acement+ proportion of mi! (#end and t)pe of cement etc.
:.4 -#ump Test sha## (e performed and recorded as per the pro"ect speciation.
:.: .## other tests mentioned in the pro"ect specification sha## (e performed
according#).
7. SAFETY INSTRUCTIONS
;.5 Concrete work sha## (e performed in accordance with re#evant pro"ect 0-%
instructions 7 0-% po#ic) of the ain Contractor.
;.6 .## efforts sha## (e made to keep the environment c#ean.
;.8 ateria# or e&uipment shou#d (e maintained in an order#) manner and #a(e#ed in
accordance with statutor) re&uirements and use in safe manner.
;.9 Concrete p#acing to (e a##owed on#) after ain Contractor approva#.
;.4 'eware from fa##ing or f#)ing concrete whi#e pouring is in progress.
;.: If (uckets are used for pour+ riding the (ucket is prohi(ited.
;.; %#ectric powered trowe#s+ f#oats 7 vi(rators sha## (e dou(#e insu#ated or grounded
for operator protection.
;.< .n) #i&uid fue# spi##s and accidenta# waste disposa# shou#d (e avoided and
proper#) c#eaned up.
;.@ No**#eEmen must use PP% for head 7 face protection.
;.5A ,+e protection re-uire. !or labor area placin/ concrete.
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