DATA SHEET
CONCRETE
Hydromedia Hydromediais isan anideal idealsolution solutionfor forsurface surfaceand andstorm storm watermanagement. management.Typically Typicallycontaining containing20-35% 20-35%void void water space,ititallows allowswater waterto topass passdirectly directlythrough throughititatata a space, 2 permeabilityof of 150 150 -- 1000 1000 L/min/m² l/min/m permeability Where useuse Whereto to Residential roads carparks (max load 7.5T) parking lotsand parking lots • Residential roads carparks (maxand load 7.5T) Pavements, bike & pedestrian pathways • Pavements, bike & pedestrian pathways Patios • Patios Tennis courtscourts • Tennis Swimming pool decks • Swimming pool decks Alleyways • Alleyways Driveways • Driveways Pavement edge drains and gutters. • Pavement edge drains and gutters. Advantages of Hydromedia InAdvantages common with standard Pervious: of Hydromedia 1.InAvailable withwith integral colour Pervious: common standard
2. Can form part of with a cost-effective Urban Drainage System (SUDS) 1. Available integral Sustainable colour 3. Eliminates need for detention ponds 2. Can form part of a cost-effective Sustainable Urban Drainage System 4. Offers space saving for more efficient land development (SUDS) 5. Mitigates surface pollutants 3. Eliminates need for retention ponds
4. Offers space saving for more efficient land development Advantages outperforming standard Pervious: 5. Mitigates contamination of groundwater by surface pollutants 1. Robust wearing surface 2. Faster draining
outperforming 3.Advantages Smooth clean look
standard Pervious:
1. Robust wearing surface 4. Ease of placement 2. Faster draining 5. Easy placement with a paver 3. Smooth clean look Technical features 4. Ease of placement 1. Unit weight is up to 70% less than conventional concrete 5. Easy placement with a paver 2. Workable for up to 90 minutes
Performance Quality Innovation
3. Compressive strength of 10–20N/mm Mpa 2
Technical features
4. Flexural strength of 1.5–3N/mm Mpa 2
1. Unit weight is up to 70% less than conventional concrete 2. Workable for up to 90 minutes Hydromedia is more fluid/flowable (higher slump approx 190 – 200mm) or class S4 3. Compressive strength of 10–20Mpa Improves the in-place homogeneity of the product 4. Flexural strength of 1.5–3Mpa 5. Excellent permeability at a rate of 150 - 1000 l/min/m2
5. Excellent permeability at a rate of:
Safety Safetyfeatures features
Placement Placement
Reduces glare from from wet wet pavements pavements Reduces glare Eliminates water water accumulation accumulation from from heavy heavy rain rain Eliminates
Important recommendations Important recommendations
The standard rules rules for for good good concrete concretepractice practiceand andplacing placingmust mustbe be The standard strictly observed with proper curing procedures as required by normal strictly observed with proper curing procedures as required by normal concrete mixes but but more more rapidly rapidly implemented. implemented. concrete mixes
Safety Safetyprecautions precautions
The use of of safety safety goggles, goggles, hard hard hat, hat, ear ear defenders defendersand andgloves glovesisis The use recommended whenplacing placingconcrete. concrete. recommended when
fluidity promotes ease placement • Higher Higher fluidity promotes easeofof placement • Rapid Rapid drying requires specialist handling and curing drying requires specialist handling and curing • Concrete transfer can be done by either off the truck or using concrete Concrete transfer can be done by either off the truck or using conveyer. Pumping is not recommended. concrete conveyer. Pumping is not recommended. • Concrete workability is 90 minutes • Test consistency using Hydromedia testing procedure when possible. Placement If not visually inspect consistency. Concrete retention is 90 minutes • Placement should be continuous and rapid Test consistency using Hydromedia testing when • Can be paver laid. Recommended pavers procedure are available uponpossible. request If not visually inspect consistency. • Reduce over working the concrete, especially after striking off and Placement finishing. should be continuous and rapid • Can Use placement method. berecommended paver laid. Recommended Pavers are available upon request Reduce over working the concrete, especially after striking off and finishing.
Striking off Use recommended placement method. First FirstAid Aid Eyes: Eyes:
Immediately for Immediatelyflush flusheyes, eyes,including includingunder underlids, lids,with withwater at least 15 minutes to remove all particles. water for at least 15 minutes to remove all particles. IfIfnecessary, necessary, seek seek medical medical advice advice
Skin: Wash a pH neutral soap as as Skin: Wash skin skinwith withcold coldwater waterand and a pH neutral soap soon visible. soon as aspossible, possible,except exceptwhere whereopen openwounds woundsare are visible. Attention should be paid to wounds and fresh scars which Attention should be paid to wounds and fresh scars which should paraffin gauze. Seek medical shouldbe becovered coveredwith withprotective protective paraffin gauze. Seek help in cases contact with wet concrete. medical helpofinprolonged cases of prolonged contact with wet Ingestion: Rinse concrete. mouth with clean water. If swallowing has occurred Ingestion: drink Rinseplenty mouthofwith water. swallowing has occurred milkclean or water. DoIfnot induce vomiting. drinkmedical plenty ofattention milk or water. Do not induce vomiting. Seek immediately. Seek medical attention immediately. Inhalation: Move to fresh air. If symptoms persist seek medical attention. Inhalation: Move to fresh air. If symptoms persist seek medical attention.
Design:
Design: There are two factors that determine pavement system design thickness: There are twoproperties factors that determine pavement systemtodesign Hydraulic such as permeability (related yearly thickness: average • properties such as permeability (related to yearly rainHydraulic fall) and volume voids (related to water storage) average rain fall) and volume voids (related to water storage) Structural properties such as tensile strength offering better load • Structural properties such as tensile strength offering better load bearing properties bearing properties Selection of appropriate Hydromedia properties is dependent • Selection of appropriate Hydromedia properties is dependent on on the the more more dominant dominant between: between: -- Hydrological requirements Hydrological requirements Load bearing requirements Load bearing requirements The larger of these values governs design thickness.
The larger of these values governs design thickness.
Subgrade and Subbase preparation • Consult geotechnical engineer
Subgrade & Subbase preparation • Uniform (level) subgrade support
Consult geotechnical engineer • Larger of two values governs design thickness Uniform (level) subgrade • Compact subgrade to support 90 – 95% of theoretical density • Increasing compaction decreases permeability Larger of two values governs design thickness • Stable subbase required, crushed aggregates recommended Compact subgrade to 90 – 95% of theoretical density Increasing compaction decreases permeability
• Conventional forms to be used • Vibrating Striking off screeds or standard screeds and roller compacters can be used Conventional forms to be used • for strike off Vibrating screeds or standard screeds and roller compacters can be used • Riser strips are not recommended due to minimal for strike off • compaction that occurs with Hydromedia strips arevibrate not recommended due to minimal • Riser Do not over or work the top surface
compaction that occurs with Hydromedia
Do not over vibrate work the top surface Compaction andorfinishing • Compact with steel roller compactors or vibrating plates or pavers to
Compaction and finishing height of forms
Compact with steel roller compactors or vibrating plates or pavers to height
• Hand tamp near edges and other places not reached of forms • Complete compaction within 15 minutes of placement tamp near edges and other places not reached • Hand No floating or trowelling • Complete Minimizecompaction over working or movement of of theplacement surface after compaction within 15 minutes This includes walking on the surface.
No floating or trowelling
Minimize over working or movement of the surface after compaction.
Jointing This includes walking on the surface.
• Contact your local technical representative for further information
• It is recommended to place joints immediately after compaction Jointing Otherwise are possible after 7 days of curing. Contact yoursaw localcuts technical representative for further information
It is recommended to place joints immediately after compaction.
Curing andsaw Protection Otherwise cuts are possible after 7 days of curing.
• Fog mist the surface within 20 minutes of compaction
• Cover thin plastic sheeting within 20 minutes after placement Curing & with Protection and leave place for 7 days Fog mist theinsurface within 20 minutes of compaction • Cover Some curing may within also be20 used with thin compounds plastic sheeting minutes after placement and
leave in place for 7 days
Maintenance Some curing compounds may also be used
• Minimal maintenance required • Design site to minimise flow of soil and leaves to pavement Maintenance • Minimal Vacuum annually or required when clogging test indicates the necessity, maintenance • alternatively try pressure washing
Design site to minimise flow of soil and leaves to pavement
Vacuum annually or when clogging test indicates the necessity, alternatively try pressure washing
Stable subbase required, crushed aggregates recommended
To discuss your specialised mix and further requirements.
0860 523 Call now - 0870 336 274 8294 Disclaimer - The information contained in this leaflet is based upon knowledge and experience of the materials used in the manufacture of the products. However, since the application of the products is carried out by the customer and is beyond the control of Lafarge Aggregates Limited, Lafarge does not accept any liability or responsibility whatsoever for any loss, damage or injury resulting from the use or application of the products outside the scope of the intended use and precautions set out in this leaflet and any accompanying data sheets.
Lafarge Industries South Africa (Pty) Ltd 35 Westfield Road, Longmeadow Business Estate Lafarge Aggregates & Concrete UK Ext 11, Edenvale, 1609 Granite House, PO Box 7388 Tel: 0860 LAFARG/0860 523 274 Watermead0861 Business Park, Syston LAFARG/0861 523 274 Fax: 086 631 000 Leicester, LE7 1WA Cape Town: (021) 508 8000 www.lafarge.co.uk Durban: (031) 275 7400 www.lafarge.co.za Lafarge Aggregates Limited registered in England and Wales 297905