TECHNICAL. Clayfill Foundation Heave Protection. Stylite.

Transcription

1 Stylite Bespoke and standard Clayfill Heave Protection - Clayfill EPS Construction - Insulation & building materials Technical information V3_16 Pr_25_71_29_16 TECHNICAL Clayfill Foundation Heave Protection Effective protection for foundations Use in commercial & residential property Lightweight, quick and easy to install No reduction in performance over time Minimal water absorption & permeability Achieves BRE Green Guide A+ 100% recyclable No HFC s, CFC s or HCFC s 350

2 STYLITE EXPANDED POLYSTYRENE From the idea to point of delivery SPI will guide you through the process making it easy for you to get the expanded polystyrene you want when you need it. Offering technical and design advice on every aspect of your order from product specifications developed by our experts to delivery of your product organised by our dedicated transport department. For more information on the full process from sample production to bespoke product modelling download our full brohure from our website. Quality You can rest assured that SPI will provide you with the highest quality products at some of the cheapest rates available. Expanding SPI is always investing in new technologies and products to stay at the forefront of the industry. Technical Our sales and technical team are always on call to answer all your EPS queries. Contents 01 - Product overview 01 - Typical build-up 02 - Material Overview 02 - Design / Dimensions 03 - NHBC Recomendations 03 - Specification Clause 03 - Installation Guide 04 - Technical specification Bespoke SPI will guide you through any bespoke project, moulded or contour cut, from start to finish. Clayfill Clay Heave Protection Technical Datasheet

3 Stylite Civil Engineering Clayfill Heave Protection Technical Datasheet Clayfill Clay Heave Protection For protection of Pile & Foundation Protects against : - Clay Heave - Soil Movement Low density compressible fill Long lasting protection Use in commercial & residential property Minimal water absorption & permeability 100% recyclable No HFC s, CFC s or HCFC s Stylite Clayfill is a proven way to protect foundations, below concrete ground beams in piled foundation constructions and at the verticle faces of deep trench foundations. The low density expanded polystyrene will protect foundations and piles against the pressure exerted by soil movement and from tree root growth. The cells in this specialist expanded polystyrene will compress within restrictions throughout the life of the structure acting as a defense between the ground and the foundation. Typical build-up - Trench Fill Typical build-up - Pile and Beam Suspended floor slab Void 450mm Max backfill Deep fill foundation Stylite Clayfill Max 500mm Pile colar Suspended floor slab Void 450mm Max backfill Ground beam Stylite Clayfill Pile Clayfill Heave Protection Technical Datasheet - 01

4 Stylite Civil Engineering Clayfill Heave Protection Technical Datasheet Compatibility Expanded Polystyrene is compatible with most chemicals and materials. For more information about how EPS interacts with different chemicals check SPI_Chemical_Behaviour.pdf Durability EPS is rot proof and durable, and will remain an effective insulation for the life of the construction. EPS is not affected by bacteria, moulds or fungi, and will not provide nutrient value for insects or vermin. Environmental Safety EPS is non-toxic, non-irritant and odorless. It does not contain CFC s or HCFC s. EPS has a Global Warming Potential (GWP) of zero and an Ozone Depletion Potential (ODP) of zero. Reaction To Fire Classification Stylite will achieve reaction to fire Euro-class F. However, the classification achieved when installed in a build will be considerably better. We also supply an FRA grade which contains a Fire retardant additive and achieves reaction to fire Euro-class E. Clayfill Dimensions The Stylite Clayfill comes in 50,100,150 & 200mm thick and 2400x1200mm. The required depth of the board will vary depending on the potential ground movement and the allowable pressure limit of the foundation substrate. It is important that the thickness of Stylite Clayfill required to resist the pressures exerted from the ground movements is correctly calculated. See the below diagram on how to determine the thickness of Stylite protection needed. The following information is needed to determine the correct thickness of Stylite Clayfill for trench fill on the verticle facing : - Maximum potential lateral ground movement - Maximum acceptable lateral force on the concrete Deep Trech fill - Verticle Face of Foundation Shrinkage Potential Plasticity Index ( % ) NHBC Void Clayfill Thickness High Medium Low Pile Collars - Underneath Beam Shrinkage Potential Plasticity Index ( % ) NHBC Void Clayfill Thickness High The following information is needed to determine the correct thickness of Stylite Clayfill for ground beams and pile caps : - Maximum potential verticle ground movement - Maximum acceptable upward force on the concrete This information is then used in the following formula to calculate the required thickness T = 100 x H/C + 10 Stylite Clayfill Thickness Compressed thickness of load P or W Compressive strain C% Medium Low Predicted maximum 0 heave H (mm) Compressive strain C (%) Allowable Transmitted Pressure P or W (knm -2 ) Please note the thicknesses given in the above tables are only esitmations, full calculations for thickness required should be conducted Clayfill Heave Protection Technical Datasheet

5 Stylite Civil Engineering Clayfill Heave Protection Technical Datasheet NHBC Recommendations The NHBC Standards 2016 outlines requirements for foundations in trench fill, ground beams and piles when dealing with soil movements. The required voids demonstrated in table 7 of chapter 4.2 (building near trees) shows the potential change volume and the correlating void thickness requirements, however, it is important to remember that the Stylite Clayfill will deform under the load of wet concrete, this has been allowed for in the thickness tabel on page 2. Specification Stylite Clayfill should be specified in the following way : The foundation heave protection material shall be Stylite Clayfill mm thick, manufactured to BS EN 13163:2014 by Styrene Packaging & Insulation Ltd. BBA approved ( Certificate No.02/3975 ) expanded polystyrene boards to be installed according to Styrene Packaging & Insulation Ltd instructions (BBA Cert). Refer to NBS Plus, clause E20/185 (Compressible Board Sub-Structure Formwork) or www. styrene.biz for further information. Stylite Clayfill Installation The product is suitable for use on ground beams of a maximum depth of 600mm in piled construction and on the verticle face of trench fill foundations up to 2m deep. Verticle faces of trench-fill foundations 1. The excavation must be founded below the ground movement zone with a 500mm concrete toe setting which will run flush with the Stylite Clayfill board. 2. With your stylite Clayfill board sat 500mm above the excavated trench depth struts will be used to prevent breakages and movement while pouring the concrete. Concrete ground beams and pile caps 1. The excavated trench will be even and compacted, blinding may be required. 2. Your boards are laid in the bottom of the excavation, closley butted, making sure all the bottom of the trench is covered. 3. Small gaps will be filled with as-dug or granular material. 4. Where the concrete piles protrude into the excavation Clayfill boards should be cut to fit around pile colars tightly. 5. Once all your Clayfill boards have been laid in the bottom, concrete spacing blocks must be used to ensure the corect concrete depth. The spacing blocks must be aranged correctly to distribute the load of the drying concrete sufficiently, making sure not to excceed 15kN-m Internal supports must be provided, struts with adequate spreader plates. 4. External support may be provided by the verticle face of the excavation unless sharp projections could cause damage to the Clayfill boards. Then external struts must be used. 5. The boards must be adequately restrained to prevent uplifting during concrete pouring. Clayfill Heave Protection Technical Datasheet - 03

6 Stylite - Civil Engineering Clayfill Heave Protection Technical Datasheet V Technical Specification Features Clayfill Standard Length Tolerance L1 EN 822 Width Tolerance W1 EN 822 Thickness Tolerance T1 EN 823 Planarity Tolerance P2 EN 825 Squareness S1 EN 824 Bending Strength (kpa)? EN Reaction to Fire F EN Water Absorption (mg Pa -1 h -1 m -1 )? EN Dimensional Stability? EN 1603 Compressive 10% (kpa)? EN 826 Compressive 1 % (kpa)? EN BRE Rating A+ BRE Element No BRE Dimensions Length mm Width mm Thickness mm Stylite Ventfill Board < 200 EN : 2012 BS EN : 1 : 2007 BS EN 1603 : 2013 BS EN : 2013 Classification code : Pr 25_71_29_16 Recycling Styrene Packaging & Insulation Ltd provide a scrap EPS pick-up to help us recycle as much polystyrene as possible back into suitable products. Please download a copy of our recycling policy to find out how to get involved. Certification We have real pride in the products we supply that is why we go above and beyond to ensure that we surpass all current regulations and offer all the relevant certifications to stand by our expanded polystyrene products. For full details of our certifications please visit our website at sales@styrene.biz 04 - Clayfill Heave Protection Technical Datasheet

7 1 2 6 To the best of our knowledge, the technical data contained herein is true and accurate at the date of issuance and is subject to change without prior notice. Please consult your structural engineer directly for design details. The proper use and application for this product must be the responsibility of the user. Styrene Packaging & Insulation Ltd is registered in England, Company No VAT Registration No Clayfill Heave Protection Technical Datasheet

8 Stylite Stylite EPS Clayfill is a low-density compressible board used around foundation structures to protect against the lateral and upward forces of ground movement which can cause damage to the superstructure. Stylite Clayfill has significant resistance to pressure whilst still maintaining its original dimensional stability meaning that when the ground forces against the expanded polystyrene it will simply compress and reform creating a pressure buffer between the integral foundations and the build. EPS is a hydrophobic material meaning it will naturally repel water and resist mold and rot, it doesn t provide any nutrition for vermin so will remain with exactly the same properties. Tel : Fax : sales@styrene.biz Styrene Packaging & Insulation Ltd Morley Carr Rd - Low Moor - Bradford - BD12 0RA