STRUX® 90/40 Advanced Synthetic Macro Fibre ... - W.R. Grace

Grace Concrete ProductsSTRUX ® 90/40Advanced Synthetic Macro Fibre Reinforcementthat Controls Shrinkage Cracking in ConcreteDescriptionSTRUX ® 90/40 is a unique, high strength,high modulus synthetic macro fibrereinforcement that is added to ready mixedand precast concrete at the batching stage.STRUX 90/40 controls drying shrinkagecracking, so it can be used as an alternative tosteel mesh and steel fibre reinforcement.STRUX 90/40Shrinkage crackAdvantages• Controls drying shrinkage cracking bycontrolling the propagation of microcrackingthus improving toughness anddurability of concrete.• Can be used as an alternative to steel meshreinforcement and steel fibre reinforcement.• Uniformly distributed throughout theconcrete matrix - no risk of incorrect steelmesh reinforcement placement.• Improves residual flexural strength, impactand fatigue resistance of concrete - R e,3values in excess of 30% can be reliablyachieved (see UK Concrete SocietyTechnical Report 34, 3 rd Edition).• Removes a site process so saves time onconstruction programme.• No steel mesh storage, fixing, movement orcrane costs.• Ready-mix concrete truck can back upand freely discharge concrete which couldremove/reduce pumping costs.Applications••••STRUX 90/40 fibreSteel MeshReinforcementShrinkage crackGround bearing floor slabsGround bearing external pavementsMarine concrete applicationsPrecast concreteNote: STRUX 90/40 is not intended as asubstitute for steel reinforcement in anyapplication other than those listed. Alwaysconsult relevant national codes.Comparison of STRUX 90/40 and other types of reinforcementReinforcement TypePlasticshrinkagecrackingDryingshrinkagecrackingReducesCorrosionriskFreeze/thawdamageSafe, easyhandlingProvidesQuick, wellcontrolledinstallationPostcrackloadcarryingcapacityPolypropylene “Micro”fibres+ - + +/- + + -Steel fibres - + - - - + +Steel mesh - + (1) - - - - + (2)STRUX 90/40 + + + - + + ++ = positive effect- = no effect(1) Only if positioned in top third of floor slab(2) Only if positioned in bottom third of floor slab®U.S. Patent Nos.: 6,569,525; 6,569,526; 6,758,897.