Solutions with Sika Systems. No more vibration

Transcription

1 Solutios with Sika Systems No more vibratio ost effective techology Faster placig with reduced labour ad equipmet No vibratio ad less fiishig Reduced oise i the eviromet Improved health ad safety coditio Improved quality ad durability

2 Sika Viscorete Techology Sika Leadig Through ostat Iov atio The Major Advaces i Admixture Polymer hemistry The Leadig Products ad Techologies otiuous Improvemet i Performace Techical Advaces 193 Ligosulphoates O MeO Na 2 S 2 O 5 O MeO SO 3 Na Plastocrete O O O O O O O Iter particle repulsio apillary porosity 3% 2% % % EM I kg/m 2 ydr. rate ~9 % Improved workability Glucoates O 2 SO 3 Na OONa 2 O Sulphoated aphthalee polymers 2 SO 3 Na O O O Sulphoated melamie polymers 2 X 2 Y N N N 2 N N N Viylcopolymers O NR 1 R 2 R 3 R 4 Modified polycarboxylates R OONa m 2 2 R 2 2 OO N O O-X-( 2 RO-) y R Plastimet -VZ emet grai emet particle floc Sikamet -NN Superplasticizer molecule Aioic groups atios Sikamet -3/-32 Sikamet -/-12 emet grai emet grai Sika Viscorete emet grai O Released water reductio up to % reductio up to 2 % up to reductio 4% up water to 4% reductio apillary porosity ~2%. poros. 2 % % capillary porosity % capillary porosity. poros. 5% 5% c.poros Exteded workability for ready-mixed cocrete First RWR for cocrete with lower w/c ratio igh early stregth ad cotrolled set 2 3

3 Sika Viscorete Techology Sika Viscorete Admixture Techology for igh Rage Reductio Reductio i Relatio to Dosage 4% 35% 3% 25% 2% 15% % 5% % Ifluece of Sika Viscorete dosage reductio.2 %.4 %.6 %.8 % 1. % 1.2 % 1.4 % 1.6 % reductio i % Double Actio Dispersig Effect Dosage Revolutioary possibilities to cotrol the dispersig effect because of chemically desiged polymers. The early cotact of hydraulig cemet grais is sterically hidered by three-dimesioal polymers. Reduced Shrikage by Reductio Fial shrikage of //4 cm specimes W/c ratio ocrete /32 mm EM I kg/m 3 Sika Viscorete ocrete Techology for Self ompactig ocrete (S) No Vibratio Sika Viscorete S is extremely cohesive ad flowable without segregatio. These excellet properties make the S capable of beig placed without vibratio. Flowability Because of its special mix desig, S shows a most smooth ad flowable cosistecy. Depedet o the method of placig ad the mix desig, the slope of S will be lower tha 3% ad might be dow to % istalled uder pressure. Properties of Sika Viscorete S Techology Sika Viscorete gives a very low water cotet, strog iteral cohesio ad the cocrete will have extremely good workability. Applicatio S ca be produced i most cocrete batchig equipmet i ready mix or precast plats. It ca be placed as pumped cocrete, poured directly or by skip. Flowability of Self ompactig ocrete (S) [cm] Secods Time of workability [h] Fial slump flow i cm Time for slump flow 5 cm i secods Mix desig 46 kg/m 3 EM II/AL 32.5 Graulates /16 mm 1.4 % Sika Viscorete-1 ad.3 % Sika Retarder Advatages of Sika Viscorete as a Powerful Super-plasticizer Advatages of Sika Viscorete for Self ompactig ocrete (S) Fresh ocrete Outstadig workability Tremedous flowability because of optimized combiatio of polymers Very homogeeous ad stable cocrete because of special additives Extremely smooth fiish with proper mix desig ardeed ocrete ighest desity because of strogest water reductio igh stregth because of miimum voids Excellet waterproofig performace igh durability because of low permeability Reduced shrikage by reducig water cotet Reduced rate of carboatio ad chloride igress due to reduced porosity Performace The extremely fluid ad soft cosistecy allows fast placig of cocrete. Noise Reductio Placig the cocrete without vibratio gives a dramatic reductio i oise. This greatly improves the eviromet for both employees ad eighbours. Ecoomy Speed of placig, highest quality without defects to rectify ad possible reductios i mapower ad equipmet result i lower overall cost. Quality osistet high stadards ca be achieved. ealth Beefits White figer sydrome, a serious ijury from vibratio equipmet is preveted. Flowability The outstadig flow properties of Sika Viscorete S allow productio of complex ad fie elemets eve through cogested reiforcemet. Durability The cohesio of the fresh cocrete ad o egative effects from vibratio result i a more homogeeous surface layer. This will reduce the permeability ad icrease resistace agaist chloride igress, carboatio ad other chemical attack. 4 5

4 Sika Viscorete Self ompactig oc rete Techology (S) Guidelies for the S Mix Desig Fresh ocrete: Measurig ad Assessmet Slump Flow Test L-Shaped Box Aggregates Preferably maximum grai sizes betwee 12 ad 2 mm are used, but other sizes are also possible. Typical Aggregate otet /4 mm 5 % 4/8 mm 15 % 8/16 mm 35 % Fies.125 mm The ecessary fies cotet of the mix depeds primarily o the maximum aggregate size, but also o the use of the cocrete. The fies cotet is geerally much higher tha with covetioal cocrete. The total fies cotet icludes the cemet, fies from sads ad additives such as silicafume. Typical Fies otet S /4 mm 65 kg/m 3 S /8 mm 55 kg/m 3 S /16 mm 5 kg/m 3 S /32 mm 475 kg/m 3 Bider The cemet/bider cotet is determied by the required quality ad the fies cotet ad also depeds o the maximum aggregate size. Typical bider cotet S /4 mm 565 kg/m 3 S /8 mm 455 kg/m 3 S /16 mm 445 kg/m 3 S /32 mm kg/m 3 The water cotet i S has a ifluece o the quality of the hardeed cocrete regardig fial stregth, capillary porosity, etc. Geerally the water cotet i cocrete of low to medium quality is above 2 l/m 3, while cocrete of medium quality has betwee 18 ad 2 l/m 3, ad high quality cocrete typically has less tha 18 l/m 3. ocrete Admixtures I order to achieve the low water cotet, cohesio ad viscosity of S with a homogeeous mix, it is ecessary to use a high quality Sika Viscorete admixture. Fillig the slump coe without compactig. The surface should be horizotal ad the coe filled completely. arefully lift the coe from the level surface. The cocrete flow should ot be broke by liftig the coe too quickly. Fill the box without compactig: The surface should be eve ad the cylider completely filled. heck for o segregatio o the surface. Quick liftig of the gate: The cocrete flow has to be cotiuous whilst liftig the gate. The Sika Products Sika Viscorete -1 For Self ompactig ocrete with exteded workability or for higher ambiet temperatures Assessmet of flowability: Measure time util diameter of 5 cm is achieved. Measure maximum diameter. heck homogeeity ad segregatio especially at the edge. Assessmet of flowability: Measure time util cocrete has reached 4 cm. Measure time util cocrete reaches ed of box. Measure height differece of cocrete after flow has stopped. Sika Viscorete -2 Sika Viscorete -3 Sika Viscorete -5 For Self ompactig ocrete with ormal workability or for cooler ambiet temperatures For Self ompactig ocrete with silicafume for ormal workability or for cooler ambiet temperatures Powerful Super-plasticizer for precast cocrete productio ad for strogest water reductio i ready mix cocrete D max D 5 cm Diameter D max : 6575 cm Flow: D 5 cm after 3 to 6 secods heck homogeeity at the edge Europea L-Box Flow: T 4 cm after 3 to 6 secods x cm / cm : >.8 Japaese L-Box Flow: T 5 cm after 3 to 6 secods T 83 cm after 45 secods x T 4 cm Sika Viscorete -3 Rage For Self ompactig ocrete i differet applicatios 6 7

5 Sika Viscorete Techology: Iteratio al ase Studies ocrete for a Revolvig Restaurat i Lucere, Switzerlad Modular otel Room Uits by Oldcastle Precast, Rehobeth, MA (USA) The ower of a historical buildig wated to build a revolvig restaurat o the groud floor. Because of the difficult coditios it was ecessary to have a very high reiforced cocrete. ocrete compressive stregth: B 4/3 Applicatio o cocrete without vibratio Pumped cocrete The project cosisted of a modular buildig system icorporatig a 5cm isulatio layer sadwiched betwee a 3.75cm structural cocrete layer ad a 5cm architectural cocrete layer separated by the fiber coect rods. igh early stregth cocrete was required because the turaroud of the forms was plaed to be less tha oe day. The cofied coditios iside the form required a extremely fluid cocrete mix. Why S was Used The existig buildig was built o piers, ad erectig a ew structure o these piers was a difficult challege. The problem was solved by usig the ew Sika Viscorete S techology Sieve passig [%] Why S was Used The desig cofiguratio made it very difficult to pour stadard super-plasticized cocrete, eve a very wet mix with a lot of vibratio resulted i a lot of poorly compacted cocrete ad large voids Stregth [MPa] Sika Solutio ocrete Mix Desig Aggregate gradig Bider Admixture /32 mm 35 kg/m 3 EM I kg fly ash 1.2 % Sika Viscorete-2 Sika Viscorete Solutio The first use of S cocrete i Switzerlad with aggregates of maximum 32mm. W/B ratio.4 Desity 2445 kg/m 3 Air cotet.5% SF 5 cm = 4 SF max = 69 cm ardeed cocrete Fcw 7 d = 45.9 N/mm Sieve (mesh) size [mm] Sika Solutio ocrete Mix Desig Aggregate gradig /16 mm Bider 425 kg/m 3 Admixtures 1.4 % Sika Viscorete-3.1% Sika AER-15 Sika Viscorete Solutio The first use of S cocrete i a America precast plat allowed the successful completio of the project with modular hotel rooms that could ever have bee achieved with stadard cocrete. W/B ratio.42 Desity 236 kg/m 3 Air cotet 4.6% 64 cm 2 Time [hours] ardeed cocrete Fcw 7 d = 4.1 N/mm 2 8 9

6 Sika Viscorete Techology: Iteratio al ase Studies Shark ad Pegui Aquariums at the Oceaopolis Marie Park i Brest, Frace A extesio of the marie park Oceaopolis ear Brest i Brittay. Buildig of two giat aquariums with very large opeigs i the fair faced cocrete walls. Why S was Used Very dese etwork of reiforcig bars. Better placig rates of cocrete were desired. Surfaces with very regular aspect ad colour were required. No segregatio at the bottom of the walls. ocrete with high flow characteristics to completely fill the formwork, especially aroud the large opeigs for widows etc. Pipe Scree for a Rail Tuel at the Meirad Lieert Square, Zurich, Switzerlad ocrete quality B 35/36 watertight ompletely fillig of the tubes igh efficiecy i cocretig Sika Solutio ocrete Mix Desig Aggregate gradig /16 mm Bider 38 kg/m 3 EM II/A-L 32.5 ad 5 kg/m 3 Fly Ash Admixture 1.7 % Sika Viscorete-1 ocrete Mix Desig Sad /3.15 mm 85 kg Aggregate 6/ mm 82 kg Bider emet EM I 52.5 R 29 kg Filler 15 kg 198 l Admixtures Sika Viscorete -3 S (.9 %) 3.96 kg Sika Viscorete -2 (.4 %) 1.76 kg Erectio of a ew R&D buildig i Tokyo, Japa. For the complex basemet, ew cocrete techologies were ecessary. Why S was Used igh stregth cocrete was required for this structure to improve the earthquake resistace; for the costructio ad complex desig with extreme reiforcemet easy pumpig ad placig was required. Flow target 65 / 5cm for 12mi Fial stregth > 6 N/mm 2 ocrete temperature Desity 2295 kg W/B ratio.45 Gravel/Sad ratio 1.2 Air cotet.8 % o site 75 cm Outside air temperature Trasport time 3 mi Placig time 25 mi for 6 m 3 ardeed cocrete Fcw 28 d 38 N/mm 2 Basemet for a ew Research ad Developmet Buildig i Tokyo, Japa A pipe scree had to be istalled to give additioal support to the very thi groud cover over the ew rail tuel at the Meirad Lieert Square i the ceter of Zurich. Te cocrete pipes of 1.55 m diameter (wall thickess 15 mm) were pipejacketed meters ito the soil from a access trech to form the pipe scree i advace of tuel borig. The soil from iside the pipes was removed ad the soil aroud the pipes ijected to cosolidate it. Reiforcig steel cages were the iserted ito the pipes ad they were cocreted sectio by sectio with S. Why S was Used The decisio was made to use Self ompactig ocrete, because the cocrete had to be pumped at least 5 m, the placed with o possibility of additioal vibratio, esurig that the complete pipe was filled without segregatio ad bleedig. osistet watertight cocrete quality had to be maitaied. W/B ratio.44 Desity 2361 kg/m 3 Air cotet 1.7% SF 5 cm = 3 SF max =72cm ardeed cocrete ocrete before pumpig ad before flow distace over 5 m: ompressive stregth after 7 days: 35.2 N/mm 2 ompressive stregth after 28 days: 47.2 N/mm 2 ocrete after 12 m pumpig distace ad after flow distace of 5 m: ompressive stregth after 7 days: 37.9 N/mm 2 ompressive stregth after 28 days: 44.6 N/mm 2 ores from the structure after 12 m pumpig distace ad after flow distace of 5 m: ompressive stregth after 7 days: 34.3 N/mm 2 ompressive stregth after 28 days: 46. N/mm 2 ocrete Mix Desig Belite emet (Low eat emet) with 7% udesified silicafume W/B = 28%, 165kg water/m 3 cocrete rushed sad ad gravel (max. size: 2mm) Admixture Sika Viscorete, dosage 2.8% o bider SF 5 cm 6569cm < 6 sec Very soft cocrete, easy to pump, excellet flow behaviour eve at cocrete temperature of 33 ardeed cocrete Fcw 28 d 86 N/mm 2 11

7 Also Available from Sika Sika ocrete Series Your Local Sika ompay The iformatio, ad, i particular, the recommedatios relatig to the applicatio ad ed-use of Sika products, are give i good faith based o Sika s curret kowledge ad experiece of the products whe properly stored, hadled ad applied uder ormal coditios. I practice, the differeces i materials, substrates ad actual site coditios are such that o warraty i respect of merchatability or of fitess for a particular purpose, or ay liability arisig out of ay legal relatioship whatsoever, ca be iferred either from this iformatio, or from ay writte recommedatios, or from ay other adviceoffered.the proprietary rights of third parties must be observed. All orders are accepted subject to our curret terms of sale ad delivery. Users should always refer to the most recet issue of the Product Data Sheet for the product cocered, copies of which will be supplied o request. Iteret: ISO ertified Quality System 91/ EN sice ertified Maagemet System ISO 141 sice 1997 S&W /99SI / Sika AG, Switzerlad 12