, Structure 141/1 B1 - BC Hydro · SUBJECT: Concrete Pile Cap Restoration, Structure 141/1 ......
13
. . BC hydro T H E - pow E R IS YOURS Inter-office memo TO: FROM: 13 August 2003 File: 5L62 SUBJECT: Concrete Pile Cap Restoration , Structure 141/1 Attached are the following sketches and information sheets for the restoration of the concrete pile caps at strcture 141/1. . 5L62-SKETCH- B1 - RECOMMENDED CONCRETE PILE CAP FOUNDATION REPAIR - . 5L62-SKETCH- B2 - REINFORCEMENT BAR SCHEDULE FOR SKETCH NO. 5L62- SKETCH- B1 . 50063-T08-D20 - TOWER TYE "'A" MK II No. 141/1, PILE FOUNDATIONS , 3 PILE GROUP Product information for Target Flowcrete , Fast Set Patching Concrete and Polymer Bonding Agent The repair details indude chipping all deteriorated concrete from the pile cap and reforming and encasing the footing with Target Flowcrete. This repair wil extend the pile cap a further 150 mm beyond the existing concrete outline.
Transcript of , Structure 141/1 B1 - BC Hydro · SUBJECT: Concrete Pile Cap Restoration, Structure 141/1 ......
. .
BC hydroT H E - pow E R IS YOURS
Inter-office memo
TO:
FROM:
13 August 2003
File: 5L62
SUBJECT: Concrete Pile Cap Restoration , Structure 141/1
Attached are the following sketches and information sheets for the restoration of theconcrete pile caps at strcture 141/1.
. 5L62-SKETCH-B1 - RECOMMENDED CONCRETE PILE CAP FOUNDATIONREPAIR
- . 5L62-SKETCH-B2 - REINFORCEMENT BAR SCHEDULE FOR SKETCH NO. 5L62-SKETCH-B1
. 50063-T08-D20 - TOWER TYE "'A" MK II No. 141/1, PILE FOUNDATIONS , 3 PILEGROUPProduct information for Target Flowcrete, Fast Set Patching Concrete and PolymerBonding Agent
The repair details indude chipping all deteriorated concrete from the pile cap andreforming and encasing the footing with Target Flowcrete. This repair wil extend the pilecap a further 150 mm beyond the existing concrete outline.
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, .
FLOWCRETE
December, 00 Page 1 of 3
PRODUCTTarget Flowcrete consists of accurately weighed Portland cement, aggregates and chemicaladmixtures. The product is designed to be used as original or repair concrete in situationsrequiring a high-quality concrete with a maximum aggregate size of 10mm (3/8 inch). It maybe mixed to any consistency from stiff plastic to flowing. An air-entraining agent isincorporated in the dry product to produce a concrete having good resistance to freezing andthawing. Shrinkage compensating agents are included to minimize plastic shrinkage. Onrequest, Target Flowcrete based on Type 50 (Type V) cement can be supplied for use inareas requiring sulphate-resistant cement. Target Flowcrete with Silica Fume is also availablefor applications requiring reduced permeabilty.
TYPICAL PROPERTIES OF TARGET FLOWCRETEMIX CONSISTENCY FLOWABLE PLASTIC STIFF PLASTIC
WATER ADDEDkg/25,kg bag (lb/55Ib bag) 6 (5. 2.4 (5. 25 (5.
SLUMP, mm (in) 255(10) 125(5) 25(1)CSA A23.
FLOW, em (in) 60(23. 40(15. 30(11.DIN 1048
AIR CONTENT, % volumeCSA A23.2-4C
VOLUME CHANGE% expansion Prior to initial set,unrestrained, CSA A23. 1 8 TraceAfter final set, CRD-C621
at 3 daysat 7 daysat 28 days
COMPRESSIVE STRENGTHMPa (lb/in ) CSA A23. 3C,1 OOmm diameter cylinders
at 1 day 13 (1900) 20 (2900) 23 (3300)at 3 days 25 (3600) 35 (5100) 42 (6100)at 7 days 34 (4900) 44 (6400) 52 (7500)at 28 days 40 (5800) 50 (7300) 60 (8700)
* The exact air content wil vary, depending on the consistency of the mix and mixingprocedures adopted. The values given are tyical for rotating drum mixers.
Prouct performance is affeced by many faclors, including storage, methd and coditions of application and use, User testing is ESSENTIAL lo detenninesuitabiiity of product for intended methd of application and use, Terget's SOLE WARRANlY is that the product has be manufcted to specations, Nooral or wrttn inronntion or advice shall increase this warranty or create new warrnties, Target' s SOLE LlASILIlY is to repl prod pred deve, In noevent shall Target be liable for any consequential , indire or other damages whether arising frm negligence or otherse,
, .
FLOWCRETE
December, 00 Page 2 of 3USES Target Flowcrete is designed for uses such as the following:
Grouting of keyways or general grouting operations where a maximum aggregatesize of 10mm (3/8 inch) is desirable.Levellng beds with a thickness of 25mm (1 inch) or more.Void fillng where a 10mm (3/8 inch) aggregate is desirable or where the minimumdimension ofthe pour exceeds 25mm (1 inch). For smaller dimensions , use TargetMachine Base Grout, Target Portland Expanding Grout or Target 1118 Grout.Structural repairs and applications requiring a high quality concrete at anyconsistency between stiff plastic and flowing where the quantities involved orplacement conditions make the use of conventional ready-mixed concreteimpractical. On request, silca fume can be included in the mix to give reducedpermeabilty.
PROCEDURES1. Prepare existing concrete surfaces for application of Target Flowcrete by thoroughly
cleaning, using appropriate techniques to remove dirt, oil , laitance, efforescence ordeteriorated concrete.Note: In some cases , such as overlays, levellng beds or repair work, a bondingslurr of Target Fast Set Patching Concrete with a mixture of one part by volume ofTarget Polymer Bonding Agent to two parts by volume of clean water is required.See product literature for Target Polymer Bonding Agent for additional details.Placing of Target Flowcrete over the slurr coat should be completed before theslurr dries and wiin one hour of mixing the slurr.
2. Add clean water to a suitable mixing container. Appropriate mixers include Jiffer orpaddle mixers powered by a 1/2 inch dril , or conventional mortar or concrete mixerswhere batch sizes warrant the use of a larger mixer. Rotating drum mixers aresuitable only if the batch size is 50% to 75% of the nominal capacity of the mixerand the mixer fins are in good condition.
3. Add Target Flowcrete to water with continuous mixing to achieve the requiredconsistency.
4. Mix for not less than 2 minutes. If a mixing period of less than 5 minutes is used,remix before placing.
5. Place and consolidate within 30 minutes of mixing, using methods suited to theapplication and consistency required.
6. Use conventional concrete finishing procedures to obtain the required surface finish.The use of magnesium or Plexiglass trowels has been found to give improvedfinishes to flatwork.
7. Place only at ambient temperatures above 5 C (40 F) and below 30 C (86 F).Protect from freezing and from temperatures above 35 C (95 F) during the first threedays after placing.
Prouct perfornce is affecd by n1any factor. including storage, method and conditions of applicauon and us. User testing is ESSENTIAL to detenninesUitabilily of product for intended method of application and use, Target's SOLE WARRATY is that the product has been manufacured to specificafions, oral or wrttn inforrfion Of advice shl increase this warranty or create new warrnties, Target' s SOLE LIABILITY is to replac prod proved defctve, In noevent shali T argel be liable for any consequential, indirec or other damages whethr arising frm negligence or otherwse,
, .
FLOWCRETE
December, 00 Page 3 of 3
CAUTIONTarget Flowcrete is a cement-rich material and while it is formulated for minimum plasticshrinkage it should be used with caution in large exposed areas in excess of 10 fe.Adequate moist curing for at least 3 days from the time of placing is essential to reducethe potential for dryng shrinkage cracking.
APPROXIMATE YIELD
CONSISTENCY FLOWING PLASTIC STIFF PLASTIC
bags/ms/Yd3
ft/bag 0.44 0.43 0.42Based on 25 kg (55Ib) bag.
Product performnce is affeced by many factors, Including storage, methd and conditions of application and us, User testing is ESSENTIAL to detem-Jnesuitability of produc for intended method of applicatioo and use, Target's SOLE WARRANT is that the product has been manufacred to specifications, Nooral or wrtten informtion or advice shall i .cease this warranty or create new warrnties, Target's SOLE UABILIlY Is to replac prod proved defve, In event shall Target be liable for any consequential , indire or other damages whther arising from negligence or otherse.
FAST SETPATCHING CONCRETE
December, 00 Page 1 of 3
PRODUCTTarget Fast Set Patching Concrete consists of accurately weighed Portlandcement, fine aggregate and admixtures. The concrete wil be fast setting andhave high strength and little or no plastic shrinkage. An air-entraining agent isincluded in this product to give improved resistance to freezing and thawing.
TYPICAL PROPERTIES OF FAST SET PATCHING CONCRETEat stiff plastic consistency
FLOW
, %
, ASTM C109- 90 - 11 0
COMPRESSIVE STRENGTH, ASTM C1 MPa (lb/inat 3 days 27 (3,900)at 7 days 40 (5 800)at 28 days 50 (7 300)
DENSITY, kg/m3 (lb/ft
000 - 2 150 (125-135)
BLEEDING, % volume
SETTING TIME , ASTM C807, at 20 Approximately 1 1/2 hours
VOLUME CHANGE , % Expansion; CRD-C621 02 max.
CALCIUM CHLORIDE CONTENT Nil
APPROXIMATE YIELDbags/mbags/ydliters/bag 13.
/bag 0.48
At a thickness of approximately6mm (1/4 inch), each 25 kg (55Ib) bag of TargetFast Set Patching concrete wil cover approximately 2m (22 ff).
Prouct perforance is affeced by many factors, including storage, meth and conditions cr application and use, User testing is ESSENTIAL to detelTinesuitabilty of prouct for intended method of application and use, Target's SOLE WARRANT is that the product has been manufactured to specificalions, Nooral or wrttn informtion or advice shall increase this warranty or create ne W8rmnties, Target's SOLE LIABILITY Is to replac product pr defecve, In noevent shall Target be liable for any consequential, indirect or other damages whethr arising frm negligence or otherwise.
, .
FAST SETPATCHING CONCRETE
December, 00 Page 2 of 3
USESTarget Fast Set Patching Concrete is designed for uses such as the following:. To repair honeycombing, rock pockets, chips, spalls and minor accidental
damage in concrete structures.. To plug form tile holes and other small holes in concrete and masonry.. To point joints in masonry, concrete pipe or precast concrete units.. As a concrete bonding slurry when mixed with a blend of 1 part Target
Polymer Bonding Agent to 2 parts water by volume.. As a polymer-modified concrete repair or resurfacing material when mixed
with a blend of 1 part Target Polymer Bonding Agent to 3 parts water byvolume and applied in thicknesses of up to 19mm (3/4 inch).
. To anchor posts , signs , railngs and other fixtures in concrete or masonry.
COLORSimilar to Portland cement concrete
PROCEDURES1. Prepare the repair areas by chipping, saw-cutting, sandblasting or other
means that wil ensure that deleterious materials are removed. It is alwayspreferable to have a 10mm (0.4 inch) minimum vertical edge where contactbetween new and old concrete occurs. Feather edging is generally notrecommended , except when Target Polymer Bonding Agent is included inthe mix.
2. Remove any dust or loose material from the area to be patched or filled. Thesurface should be thoroughly saturated with water and maintained wet for atleast one hour before fillng operations begin. Remove all free surface waterand allow the surface to become "surface dry just prior to fillng.
3. In smaller patches and joints , bonding agents are generally not necessary. Inlarge patches in slabs or walls the bond strength can be increased by firstscrubbing the area to be filled with a slurry of Target Fast Set PatchingConcrete mixed with a blend of 1 part by volume of Target Polymer BondingAgent to 2 parts by volume of water. The use of Target Polymer BondingAgent wil also give improved resistance to penetration by water and de-icingsalts.
4. Empty Target Fast Set Patching Concrete into a clean wheelbarrow, pail ormixer and add clean water. Alternatively, a blend of 1 part by volume ofTarget Polymer Bonding Agent to 3 parts by volume of water may be used as
Product performance is affeced by many factors , induding storage, methd and conditons of application and us, User testing is ESSENTIAL 10 deteoninesuitbilty of product for intended method of application and use, Target's SOLE WARRAN1 is that th product has ben manufactured to specications, Nooral or written inrormtion or advice shall incease this warranty or create new warrnties, Target' sSOLE LIABILIT is to repce prod pred defective, In noevent shall Targe be liable for any consequential, indirect or other damages whether arising fr negligence or othrwse.
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FAST SETPATCHING CONCRETE
December, 00 Page 3 of 3
the mixing liquid for the repair mix to obtainimproved bonding. This procedure should be used only if a slightly darkercolor of the repair material is acceptable. Mix thoroughly until a stiff plasticconsistency is achieved. (Certain applications may require a dry packconsistency. ) The temperature of the mix should be 10 C to 24 C (50 F to
F).5. Mix only as much material as can be used within 30 minutes after the
addition of mixing liquid.6. Place the repair mix in the prepared area and firmly consolidate. Strike off
level with a trowel or float and wait approximately 10 t015 minutes beforeapplying the final finish.
7. Adequate curing is extremely important. As soon as the concrete hashardened , maintain the patch in a continuously damp condition for not lessthan 24 hours by water spray, ponding, wet burlap or plastic, or use TargetCure & Seal. Protect from temperatures below 5 C (41 F) or above 35(9S F) for at least 72 hours after placing.
CAUTIONTarget Fast Set Patching Concrete is intended for use in a dry pack or stiffplastic consistency in a thickness of up to 75mm (3 inches). Where apourable material is required consult Target Products Ltd.Target Fast Set Patching Concrete is a cement rich material , and while it isformulated for minimum plastic shrinkage, it is not recommended for use inlarge exposed areas with a potential for drying shrinkage cracking.It is not recommended for use under machinery or rails subjected to severerepetitive impact or vibration. Contact your Target representative forinformation on Target grouts for use in these situations.
. Do not apply Target Fast Set Patching Concrete when the surfacetemperature of the area to be repaired is less than 5 0 C (41 F). or more than35 0 C (95 0 F).
SPECIFICATION GUIDEPatching mortar shall be a Portland cement based system such as Target FastSet Patching Concrete or an approved equal. Patching mortar shall contain nocalcium chloride or gypsum. The patching mortar shall have a positive volumechange on setting of not more than 0.02% and develop a compressive strengthof not less than 24 MPa (3 500 Ib/in ) at 3 days and 48 MPa (7 000 Ib/in ) at 28days.Prouc performance is affeced by may factrs, including storage, me!hod and coditons of application and use, User testing is ESSENTIAL 10 detennnesuitabilty of prouct for intended me!hod of application and use, Target' s SOLE WARRANTY is that !he product has been manufactured to specifications, Nooral or wrtten Informtion or advi shall incease this warranty or create ne warrnties, T argel's SOLE LIABILIT is 10 replace product pr defectve, In noevent shall Target be liable for any consequential , indirect or other damages whther arising frm negligence Of otherwise.
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POLYMER BONDING AGENT
December. 00 Page 1 of 3
PRODUCTTarget Polymer Bonding Agent is a styrene butadiene emulsion polymercontaining special chemical admixtures. It is designed for use as a bondingagent with concrete and cement-based products in interior or exteriorapplications.
Target Polymer Bonding Agent is also designed for use as a polymer modifier inmortars and concretes to develop increased tensile, flexural and bond strengths.The use of Target Polymer Bonding Agent in concretes and shotcretes alsogives significant improvements in resistance to penetration by chlorides and de-icing salts.
After curing, Target Polymer Bonding Agent is not re-emulsifiable.
APPEARANCEWhite, milky liquid
USESTarget Polymer Bonding Agent is designed for uses such as the following:Bonding slurr coats or primers applied to existing concrete before placingoverlays or patches.As an integral component of mixes such as:
Concrete or mortar overlays, patches and levellng coatsShotcrete or guniteBonding mortars such as tile setting mortars.Pointing mortars , stucco and Portland cement plaster.Parge coats for concrete.
PROCEDURESA. BONDING SLURRY FOR REPAIR OF OVEkLAY WORK
1. Prepare existing concrete surfaces by removing all traces of dirt, oilgrease, laitance and loose or deteriorated concrete. Sweep, vacuumclean , or use air jets to remove all loose material.
2. Saturate concrete with water for 24 hours before placing new material.Remove excess water from concrete surfaces before applying bondingslurry. A saturated surface-dry base concrete is ideal.
3. Prepare a bonding slurry by mixing either Target Fast Set PatchingConcrete or a 1: 1 cement: fine sand blend with sufficient diluted Target
Product perfrmanc.e is affected by many factors, induding storage, methd and coditions of applica60n and use, User testing is ESSENTIAL to determinesuitabilty of prouct for intended method of application and use, Target's SOLE W ARRAI\'T is tht the prOduct has been manufactured to spcications, Nooral or wrtten informtion or advice shall increase this warrnty or create new warres. Target'sSOLE UABILfT is to relac prod pr defective. In noevent shaJi Target be liable for any conseQuen al, indirect or other damages whether arising frm negligence or otherwse,
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POLYMER BONDING AGENT'
December, 00 Page 2 of 3
Polymer Bonding Agent to give a thick creamy consistency. The dilutedTarget Polymer Bonding Agent should contain 1 part of volume of TargetPolymer Bonding Agent to not more than 2 parts of volume of water.
4. Apply the bonding slurry to the saturated concrete , using a stiff bristlebroom to ensure that the slurry is scrubbed onto the concrete surface andspread to form a layer not more than 3mm (1/8 inch) thick.
5. When mixed as described in Section A3 and applied at a thickness of3mm (1/8 inch) the bonding slurry wil cover approximately 8m
(87tf) perliter (1 US gallon) of undiluted Target Polymer Bonding Agent.
Coverage rates wil vary with the texture of the surface being coated.6. Place the overlay or patching mix over the immediately after applying the
slurry. Protect the slurry from drying before placing the overlay orpatching mix.
7. Use standard moist curing or Target Cure & Seal to prevent drying of theoverlay or patching mix, except in cases where Target Polymer BondingAgent has been used as a component of the overlay or patching mix (seeSection B). NOTE: In some situations , the use of a bonding slurry might not befeasible. Consult Target Products Ltd. for advice on the use of liquidTarget Polymer Bonding Agent in these applications.
B. INTEGRAL POLYMER MODIFIER FOR OVERLAYS, PATCHES & LEVELLING COATS
APPLICATION DILUTION RATIO(parts by volume)
Target Polymer WaterBonding Agent
Bonding mortars, tile mortars
Cement, plaster, parging
Pointing mortars , stucco, plaster
Overlays, toppings, patches , (over slurry coat)
1. Thoroughly blend the dry components of the mix before adding dilutedTarget Polymer Bonding Agent. Stir the mixing liquid before adding it to
Produc performance Is affeced by many factors, induding storage , method and conditions of applicaon and use, User tooting is ESSENTIAL to determnesuitability of prouctfor intended method of application and use, Target's SOLE WARRANT is that the product has been manufactured to specifications, Nooral or wrtten information or advice shall increase this warrnty or create new warrnties, T argel's SOLE LIABILITY is to replac proct pr defct, In event shall Target be liable for any consequential, indirec or other damages whthr arising frm negligence or otherwse,
POLYMER BONDING AGENT
December, 00 Page 3 of 3
the concrete or mortar mix. Recommended dilution ratios are shown inthe table. The dilution ratios given are suitable for most conditions.Where bonding or resistance to salt penetration is critical , consult TargetProducts Ltd. for advice on appropriate procedures.
2. Place the mix within 20 minutes of the start of mixing.3. Avoid over-trowellng. For large areas use metal edged screeds.4. Clean trowels or screeds with water frequently during placing and
finishing.5. Where rapid surface drying caused by air movement or high
temperatures is likely to occur. protect the material from moisture loss byapplying wet burlap or polythene sheeting.
6. Moist curing of mixes containing Target Polymer Bonding Agent is notessential or recommended , except as noted in Section 5 above.
C. POLYMER MODIFIED SHOTCRETE OR GUNITE1, For dry process applications , use a pre-moisturizer to bring the moisture
content of the shotcrete or gunite to approximately 4% by weight. Useundiluted Target Polymer Bonding Agent as the mixing liquid at the waterring
2. For wet process applications based on saturated aggregates, useundiluted Target Polymer Bonding Agent as the mixing liquid. If dryaggregates are used in the mix, add sufficient water to bring the moisturecontent of the mix to approximately 4 % by weight before adding undilutedTarget Polymer Bonding Agent to obtain the required consistency.
CAUTION. DO NOT allow Target Polymer Bonding Agent to freeze.. DO NOT apply mixes containing Target Polymer Bonding Agent at
temperatures below 5 C (41 F) or above 30 C (86 F). Protect fromtemperatures outside this range for at least 3 days after placing.Avoid over-mixing of material containing Target Polymer Bonding Agent orthe use of high-speed mixers , which can entrain excessive quantities of air.
. When used as an integral component of mixes, Target Polymer BondingAgent can cause the color of cured concrete to be slightly darker thanunmodified concrete. Where color is of importance, a test area should beprepared and evaluated.
Product perfrmnce is affected by many factors, induding storge, methd and conditions of applir.ation and use, User testing is ESSENTIAL to determinesuitabilty of prouct for intended method of application and us, Target's SOLE WARRANTY is that the prouct has been manufactred to spefications- Nooral or wrtten information or advice shail increase this warrnty or create new warrnties, Target's SOLE LIABILITY is to relac prod pr defee, ln noevent shall Target be liable (or any conseuential, indirect or other damages whether arising frm negligence or othelWse.
