Laterlite Sport Field Drainag
SPORT FIELD DRAINAG
SPORT FIELD DRAINAG
Effective sport field drainage is essential to create a fully efficient playing surface (made either of natural or synthetic grass, earth, or sand) for frequent use, including in bad weather or after sudden heavy rain.
The drainage requirements for natural grass playing fields are particularly demanding because of the need for frequent watering and because they can become unusable if damaged by stagnating water, mud, or puddles.
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DESIGN
Depending on design requirements the drainage system may be placed
BRAND
Laterlite
PRODUCT TYPE
Drainage Systems
PLAYING SURFACE
Under a whole playing field as a continuous layer that drains in all directions. maximising usability of the playing surface
DIFFERENT GRANULAR SIZES
Depending on the design requirements, the performance of a playing surface can be optimised by laying it on successive levels of expanded clay of different granular sizes.
PEAK FLOWS
Peak flows exceed capacity
RAINFALL EVENTS
Increased intense rainfall events
ENVIRONMENT
Outdoor
FLOODING
Risk of flooding increases
EFFECTIVE WATER REMOVAL
Effective water removal because of its high permeability (> 500 mm/min) even in the most difficult impermeable terrains (clay-rich ground).
LATERLITE EXPANDED CLAY
Laterlite Expanded Clay can be used in the drainage systems of soccer, rugby, athletic fields, golf courses, tennis courts surfaced with red clay or grass, racecourses, riding schools, beach volleyball courts, bowling greens, and recreational or open-air play areas in general.
SLOPES
Stabilizes silty clay slopes
PEAK WATER FLOW
Regulates peak water flow
A VALUABLE MOISTURE
A valuable moisture and airreserve (approx. > 30% moisture and > 85% air) because of its high percentage of voids, which is good for keeping turf healthy.
PRODUCTION
Made in USA
REDUCES STORMWATER
Reduces stormwater discharge peaks
PREVENTION OF SETTLEMENTS
Prevention of settlements and subsidence over timein the supporting ground because of the very low density of expanded clay (330 – 400 Kg/m3) which also stabilises the ground
EASE OF INSTALLATION ON EXISTING BUILT STRUCTURES
Ease of installation on existing built structures such as sports areas on roofs or on top of underground car parks because lightweight expanded clay reduces loading on the structure even when saturated with water. See Green Roofs.
DOWMLOAD
↓ Geotechnics and infrastructure
PROTECT INHABITED
Protect inhabited areas effectively
DETAIL
ANGLE OF INTERNAL FRICTION
The angle of friction of unbounded expanded clay is obtained from triaxial tests by varying the lateral confi ning pressure of the aggregate and its degree of compaction. For design purposes, with a confi ning pressure of 200 kPa (which is typical of the most important geotechnical applications), a value of approximately 40° can be assumed.
SURFACE STIFFNESS OF EMBANKMENTS – PLATE LOADING TESTS
The surface stiffness of expanded clay embankments is determined by plate load testing. The stiffness values obtainable will depend on the technical solution chosen, the grain size of the expanded clay, and the degree of compaction. The various methods for constructing an embankment are described in detail in Section 2. In general these include a finishing layer to distribute the loading.
The graph shows the trend of the modulus of deformation Md as a function of the relative density, for an 80 cm thick layer of type 0/30 expanded clay finished with 20 cm of granular mix. If necessary, an asymptotic value of Md = 200 Kg/cm2 can be considered for design purposes, which corresponds to a degree of compaction of the aggregate that is easy to attain using ordinary ground-compacting machinery (plate vibrators, compaction rollers).
SUSTAINABILITY
Laterlite Expanded Clay, as well as the rest of our range, are manufactured using the Best Available Technology (BAT) that uses natural resources effi ciently, obtaining more than 5 m³ of expanded clay from 1 m³ of our abundant natural local clay. We operate an environmental management system that complies with voluntary international standard ISO 14001:2004, and Health and Safety Management Best Practice that meets British Standard BS OHSAS 18001.
Whilst we are continuing to reduce emissions from our manufacturing plants, for some time we have also been implementing a long-term programme of further development to make them more energy-effi cient. At all of our factories we have replaced fossil fuels with alternative recycled combustibles and/or biomass, whilst a signifi cant part of the electrical energy we use is now generated on site from renewable sources.
Laterlite is a partner member of the CASA CLIMA energy certifi cation agency and is actively involved in promoting energy effi ciency as a member of the Green Building Council for Italy: promoting the retention and upgrading of existing buildings and encouraging sustainability throughout the construction Industry supply chain. Most of our products are certifi ed by ANABICEA, the Italian Accreditation Institute, for use in sustainable construction.
WATER ABSORPTION AND DRAINAGE
Laterlite Expanded Clay is an inert, vitrifi ed, dimensionally stable material whose volume remains unchanged in contact with water. When the inter-granular voids (i.e. the voids between the granules, which interconnect with one another) are immersed in water they immediately become saturated; the intra-granular pores (the voids within each granule) only fi ll more slowly with water by capillary action, and some of them will never become saturated.
The excellent drainage capacity of expanded clay is due to this network of intergranular pores, whilst the water absorption is due to the intra-granular pores. In accordance with European Standard EN 13055-2 (par. 4.8), the coeffi cient of water absorption of expanded clay is determined by immersing a dry sample in water for 24 hours.
Comparison of its weight before and after the test (of the drained material) gives the quantity of water that has been absorbed by the granules (this will vary, depending on the grain size). For design purposes, the coeffi cient of water absorption of Laterlite Expanded Clay can be conservatively considered as always less than 25% by weight. Laterlite Expanded Clay is also available in the special Laterlite Plus dry hydrophobic variant, which maintains its extremely low coeffi cient of water absorption over time.