1 / 85

Haifa – Israel 03-13-2017

Haifa – Israel 03-13-2017 Mowilith LDM 6880 – Polymeric Concrete Addition Technology for Liquid- Proof Concrete Prof. Dr.-Ing. Jörg Reymendt ISG-Engineers, Darmstadt Schottener Weg 8 · D-64289 Darmstadt/Germany Tel +49 6151 7706-0 www.isg-ingenieure.de reymendt@isg-ingenieure.de.

robertjbrown
Download Presentation

Haifa – Israel 03-13-2017

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Haifa – Israel 03-13-2017 Mowilith LDM 6880 –PolymericConcrete AdditionTechnology for Liquid-ProofConcrete Prof. Dr.-Ing. Jörg Reymendt ISG-Engineers, Darmstadt Schottener Weg 8 · D-64289 Darmstadt/Germany Tel +49 6151 7706-0 www.isg-ingenieure.de reymendt@isg-ingenieure.de

  2. Description Mowilith LDM 6880 • Product Description • MOWILITH LDM 6880 is an organic concrete additive acc. to European Standards • MOWILITH LDM 6880 has an European Certification (ETA-10 0374). • Designed for producing liquid-proof concretes in accordance with the corresponding German DAfStb directive (German Committee for Reinforced Concrete/ DIN-NA-Bau) • Suitable for concretes to fulfil the requirements of Germany's Federal Water Act (WHG) • Fulfil the requirements of the German ordinance on installations for the handling of water-hazardous substances (VAwS).

  3. Description Mowilith LDM 6880 • Benefits • MOWILITH LDM 6880 is able to increase concrete’s resistance against • acids • saline solutions • fuel • and similar water hazardous substances

  4. Description Mowilith LDM 6880 • Mowilith is approved by the • European Technical Assessment • ETA-10/0374

  5. ETA Approval – Intended Use

  6. ETA Approval – Intended Use

  7. Application Examples/ Selected References

  8. Application Examples/ Selected References

  9. Liquid –TightConcreteConstructions forsafe of Enviroment in Chemical Industry

  10. tightness of concreteduring application of fluids tightness of construction or concrete member Tightness against water-polluting substances Liquid-tightconstruction Primary barrier Secondary barrier Statics, proof of tightness, detail planning and execution Concrete technology

  11. Liquid-tightConstruction • Physical Action • Penetration of fluids into the concrete matrix • Chemical Action • Degradation depth(Damage if concrete matrix during time t) • Mechanical Actions • Load and restraint (live-loads, temperature difference…)

  12. 1989: German Research-Project about Liquid-Tight Concrete • DAfStb (German committee for reinforced concrete) • Aim of research: • Understanding of the penetration of water-hazardous substances (chemicals) into concrete • Development of special concrete mixtures with high penetration resistance • Development of concrete- and reinforced concrete constructions for the retention of water-polluting substances • Development of construction details for liquid-tight concrete systems (e.g. petrol-station/ filling station) • Issuing of a guideline for concrete construction when dealing with water-hazardous substances (BUmwS)

  13. 1989: German Research-Project about Liquid-Tight Concrete Development of a building regulation for constructions to protect the environment and groundwater against water hazarded substances The usage of the Directive is required by German government.

  14. liquid tight concrete FD-Concrete: concrete according to DIN EN 206-1 and DIN 1045-2with the specified composition according to the guideline BUmwS of the DAfStb (German committee for reinforced concrete) “Concrete construction when dealing with water hazardous substances” BUmwS liquid tight concrete according topenetration test FDE-Concrete: concrete according to DIN EN 206-1 and DIN 1045-2 with proven penetration behaviour. Penetration depths must be lower than FD-concrete Liquid-Tight Concrete

  15. Mixture of FD-Concrete (liquid proof concrete acc to BUmwS) • Concrete Strength fc≥C30/37 • Grain-size distribution curve as far as possible the range A/B according to DIN 1045-2 • Grain size 16 mm ≤Dmax≤ 32 mm • Water-cement ratio (w/c)eq ≤ 0.50 • Liquid portion of additives (e.g. polymers)must be taken into account • Adding of fly ash and silica fume possible(w/c)eq ≤ 0,50 • Volume of cement and water ≤290 l/m³

  16. FDE-Concrete (liquid proof concrete according to penetration test) All concretes that do not meet the mixture requirements of FD-concrete are FDE-concretes. For FDE-concretes, it must be demonstrated in penetration tests that at least the characteristics of an FD-concrete (liquid proof) are reached.

  17. Examples of FD- and FDE-Concrete - Fibre concretes- Concrete with largest grain size less than 8 mm- Concrete with organic or inorganic additives FD-concrete FDE-concrete FDE-concrete

  18. Penetration behaviour of fluidsin non-cracked concrete

  19. d et h t Tightness against water-polluting substances Defination of tightness of concrete constructions: 72 h et ≤ h / ge et Tightness: The penetration front of the medium as a liquid does not reach the side of the concrete component facing away from the impingement during the application time with a safety distance.

  20. sealing plug test liquid 50 cm glass cylinder dense jacket sample (drill core) Test setup of a penetration test 40 cm 15 cm 10 cm

  21. Statement on the expected depth of penetration Penetration behaviour of liquids in concrete Physical properties of the liquid s : Surface tension [mN/m] h: dynamic viscosity [mN s/m²] Typical:

  22. Penetration behaviour of liquids in concrete Based on hundreds of penetration tests with FD-Concrete Penetrationdepth e72 in mm Fig. 2-1 – Determination of the penetration depth e72 for FD-concrete dependent of ỏ and ᵑ ỏ Surface tension in mN/m ᵑ dynamicviscosity in mN s/m2

  23. s h Typical values for s h Medium [ m0,5/s0,5 ] n-decanol 1.47 Diesel / heating oil 2.78 petroleum 6.95 n-pentan 8.53

  24. Penetration behaviour of liquids in concrete Petrol Diesel Penetrationdepth e72 in mm

  25. Penetration behaviour of liquids in concrete

  26. Penetration behaviour of liquids in concrete Results of penetrations tests on FD-Concrete with methylene chloride

  27. Determination of the depth of penetration in FDE-concretes Reference materials for penetration tests with physical properties Determination of the new borderline (numeric example)

  28. Determination of a new borderline for penetration depths in concrete

  29. FDE-concrete polymer-modified with Mowilith LDM 6880 Penetration depth of concrete with Mowilith LDM 6880?

  30. Penetration tests at the Technical University Darmstadt Penetration tests on Mowilith LDM 6880 modified concrete at the Technical University of Darmstadt Hundreds of test body's with different liquids and different penetration times up to one year!  Find out a new borderline of penetration for Mowilith LDM 6800 - concretes Experimental specimens during the penetration experiments

  31. FDE-concrete polymer–modified with Mowilith LDM 6880 The low penetration depths can save reinforcement during pressure zone verification. Reduction of penetration depth up to 36% compared to FD concrete

  32. Depth of damage for acid attacks For standing acids or acids moving only slightly, of any random concentration, the mean depth of damage for FD-concrete with insoluble stone grains may be set at sC72m = 5 mm within 72 hours. Example: Sulfuric acid application after 72 hours on standard FD-Concrete

  33. Penetration behaviour of fluidsin cracked concrete

  34. Why are small cracks a problem with hazard chemical fluids? • At water tight constructions, the crack will close after a while (self healing effect): • Formation of water-insoluble calcium carbonates in the crack, • closing of the crack by fines and loose concrete particles contained in the water, • sources of the cement stone at the crack ridges, • hydration of existing cement particles. This will not work with chemicals!

  35. Penetration behaviour of liquids in concrete with specified cracks

  36. Experimental results DAfStb (German committee for reinforced concrete) -research paper No. 440

  37. Experimental results DAfStb (German committee for reinforced concrete) -research paper No. 440 • Investigations at a separation crack • Crack width wr = 0.1 mm Thickness of test speciment: t = 6 cm Application: Motor oil (normal for cars) Crack width wr = 0,1 mm Time for penetration Tfr = 22 min

  38. Experimental results DAfStb (German committee for reinforced concrete) -research paper No. 440 • Investigations at a separation crack • Crack width wr = 0.1 mm Thickness of test speciment: t = 6 cm Application: Motor oil (normal for cars) Crack width wr = 0,1 mm wr = 0,12 mm Time for penetration Tfr = 22 min Tfr = 9.3 min

  39. Penetration of fluids in centric separated cracks Example: Toluene h = 0.6 mN·s/m2 Crack width limitation wr = 0.1 mm Concrete pressure tension: sc = 1.5 N/mm2  ew72m = 220 mm  ew72k = 297 mm (Guideline BUmwS)  ew72d = 446 mm

  40. Summary • The demonstrations of the imperviousness on uncoated concrete construction are performed according to the guideline BUmwS. • The proof for separation cracks is purely theoretical and not applicable in practice. • Despite the pressure tensions, bridged cracks have higher penetration depths than the uncracked cross-section. • The proof for bridged cracks assumes a minimum reinforcement for 0.1 mm and is practically only expedient for pre-tensioned systems.

  41. Use of Mowilith LDM 6880 for FD (liquid proof) -concretes according to the German DAfStb - Guideline BUmwS

  42. Classification of Polymer Modified Concrete (PCC) DAfStb guideline BUmwS: Part 2: Building materials and effect of water hazardous substances Is polymer-modified concrete an FD-concrete or FDE-Concrete? What are the prerequisites for the use of polymers in FD-Concretes

  43. DAfStb guideline BUmwS, Part 2 3 Requirements 3.1 Concrete 3.1.1 Liquid-proof Concrete (FD-Concrete) (1) FD-concrete must meet the requirements of normal concrete as per DIN EN 206-1 and DIN 1045-2. (2) FD-concrete must present an equivalent water-cement value (w/c)eq < 0.50. The concrete must feature strength class > C 30/37. (3) The following cements as per the standard series DIN EN 197-1, DIN EN 197-4 as well asthe standard series DIN 1164 may be used: CEM I, CEM II-S, CEM II/A-D, CEM IIA-P, CEM II-V, CEM II-T, CEM II/A-LL, CEM III/A, CEM III/B and cements CEM II-M, which are composed of combinations of the aforementioned other main components S, D, P, V, T, LL (A/S-D, A/S-P, A/S-V, A/S-T, A/S-LL, A/D-P, A/D-V, A/D-T, A/D-LL, A/T-LL, A/P-V, A/P-T, A/P-LL, A/V-T, A/V-LL, B/S-D, B/S-T, B/D-T, B/S-V, B/D-V, B/V-T) and those holding a general construction inspection license. (4) Aggregates as per DIN EN 12620 in accordance with DIN EN 206-1 and DIN 1045-2, Section 5.2.3, are to be used. For components that are supplied with strong acids, insoluble aggregates must be used. The maximum particle size is 16mm <Dmax< 32mm. The screen line should be in the A/B range as per DIN 1045-2. (5) Fly ash according to DIN EN 450-1 and silica dust as per DIN EN 13263-1 may be deployed as per DIN EN 26-1 and DIN 1045-2, section 5.2.5. The equivalent water-cement value must be (w/c)eq< 0.50.

  44. DAfStb guideline BUmwS, Part 2 (6) polymer dispersions, insofar as their application for concrete is approved as per DIN EN 206-1 and DIN 1045-2, may be used. For the determination of the water-cement value, the syntheticsadditives (solid and liquid share) are to be fully observed. The chemical resistance of the synthetically modified concrete against the interacting water-polluting substances in the construction must be proven, if required, by way of the pressure resistance of drill cores referred to in Annex A, Section A.4. For this purpose, three 28 days old drill cores in the air, in water and in the water-polluting substance are stored for an additional 28 days. The proof is accepted if the mean pressure strength of the test specimens in the water-polluting substance and stored in the water is at least 85% of the medium pressure-resistance of the test specimens stored in the air. (7) FD-concrete may also be manufactured as LP-concrete with an artificial air-pore content as per DIN EN 206-1 and DIN 1045-2. The leak-proof certificate referred to in Part 1 of the underlying concrete pressure resistance class must be observed. (8) Remaining water may also be deployed as per DIN EN 1008. By way of the appropriate suitability tests and measures during manufacture, it is to be ensured, in particular, that also in this case - the water-cement value referred to in paragraph (2) is observed and

  45. DAfStb guideline BUmwS, Part 2 (9) to minimise the shrinkage and the hydration heat, the paste volume, consisting of the volume of the cement, the volume of the additive value which is charged to the equivalent water-cement value and the water volume may not exceed 290 l/m3. (10) The concrete may not tend to discharge water (bleed) or to segregate. It must be fully condensable. On installation, the concrete should feature the consistency F3. Softer consistencies may be applied if it is proven that segregations under the installation conditions can be reliably prevented. 3.1.2 Liquid-proof concrete as per penetration test (FDE-concrete) (1) FDE concrete must meet the requirements of DIN EN 206-1 and IN 1045-2. (2) FDE concrete must present an equivalent water-cement value of (w/c)eq < 0.50. (3) Concretes, which do not comply in all items with Section 3.1.1, Paragraph (3) to (7), can also be deployed as FDE-concrete for barriers within the framework of this directive, if the penetration depth e72m of water-polluting substances is not higher than for FD-concrete, as per Section 3.1.1. (4) This minimum requirement for FDE concrete shall be deemed to be fulfilled if the penetration depths for n-Hexane and Di-Chloromethane (Table 2-1) are not higher than for FD-concrete, see Section 4.2.2, Paragraph (4). (5) In the event a greater penetration resistance is proven for FDE concrete than for FD-concrete as per Section 3.1.1, penetration tests are to be performed with the corresponding water polluting reference materials n-Hexane and Di-Chloromethane, see Section 4.2.2, Paragraph (7).

  46. Historical Development of Polymer Modified Concretes • Around 1925 first experiments in England • 1960 investigations in Germany • from 1980 extensive investigations:Renovation of repair building materials Replacement as polymer material

  47. Definition PC and PCC Concretes containing synthetics Polymer immersed concrete (PIC) Reaction resin(Epoxy)-concrete (PC) Polymer modified concrete (PCC)

  48. Definition Concretes containing synthetics Polymer immersed concrete (PIC) Reaction resin(Epoxy)-concrete (PC) Polymer modified Concrete (PCC) Concrete with to which an organic binding agent (e.g. reaction resin) is added instead of the inorganic binding agent (cement). After the hardening of the resin the epoxy alone takes over the function of the binding agent.

  49. Definition Concretes containing synthetics Polymer immersed concrete (PIC) Reaction resin(Epoxy)-concrete (PC) Polymer modified Concrete (PCC) Hardened concrete, where the pore space in the cement stone is retroactively filled with a monomer using the capillary effect or under pressure. Subsequently the organic material hardens in the pore structures of the solid concrete.

  50. Definition Concretes containing synthetics Polymer immersed concrete (PIC) Reaction resin(Epoxy)-concrete (PC) Polymer modified Concrete (PCC) Concrete to which in addition to the inorganic binding agent an organic material is added during mixing. The binding agent function is carried out by both components.

More Related