Page 22 - September 2017 Digital

Project reference High Rise Tower- Supertall Sky Scraper COVER STORY case study Client : Sree Ram Urban Infrastructure Ltd Project : Palais Royal Con Contractor : Raghuveer Urban Constructionstractor : Raghuveer Urban Constructions No. Floors : 88 Height : Approx 320 M Total conc : Approx 170000 CuM Concrete: M50 Flowable50 Flowable M M60 Flowable M80 grade Self Compacting Concrete Enhancing pumpability of concrete in Highrise construction A major challenge in the construction of highrise buildings is maintaining the vertical pumpability of concrete to big heights, while preserving its low viscosity. Sika’s ViscoCrete plasticizers ® 1August 26, 2017 Self compacting concrete – Key challenges do this job well. By IBRAHIM SHAIKH, SENIOR PRODUCT MANAGER, SIKA INDIA. CHALLENGES: to the above challenges - Sika® ViscoCrete® are very versatile polymers unlike SNF Main challenges when concreting at great technology polymers. PCE polymers are tailor made heights: and can be designed according to specifc • High performance concrete (HPC) Pumping concrete to the desired height requirements. • Conveying (Pumping) concrete to the Because of very low water : cement ratio and • Adsorption speed required height high fnes content, the concrete becomes • Water reduction • Workability (Flowability) over time very sticky, very viscous, and difcult to • High workability Most tall building projects use high pump. Sika® ViscoCrete® technology helps • Reduced Stickiness performance concrete (HPC) which ranges in reducing the viscosity, yield stress, giving • Stability / Viscosity from 50Mpa– 100Mpa better fresh concrete behavior even at such a • Slump retention without retardation Requirement of HPC: low water : binder ratio so that concrete can • Less sensitive “Afcons took a leap of faith a couple of years back when it decided to • Very low water/Cement ratio be pumped easily to the required height. According to above properties polymers integrate the Candy software into its system. The company was generally less than 0.3 could be formulated to achieve desired chugging away with its legacy system but we felt the need for a more • Considerably high cement content Workability over time: properties. advanced tool. We started looking for software that wouldn't just • Part of cement is replaced by To bring the concrete from long distances With the use of Sika ViscoCrete technology calculate tender cost but give a near-accurate analysis of tenders. We cementitious materials or site batched concrete, the concrete should following properties could be well wanted it to also give a quick and correct estimation while tendering. • Use of High efcient have a minimum fow retention period of achieved: We chose Candy from a pool of software and our decision was Superplasticizers 2-3 hours for pumping and fnishing, and it • Better fresh concrete behavior vindicated. It exceeded our expectations in terms of performance.” Challenges for Making High Performance should set normally. • Stable mix AFCONS INFRASTRUCTURE concrete: Sika® ViscoCrete® technology retention • Less viscous • Variations in fne and coarse polymers help in retaining (workability) • Less stickiness Put your project on track and advance full steam ahead with CCS. aggregates fowability for hours without any efect on • High water reduction • Diferent source of cement with the setting time of the concrete. • Slump fow retention without Get on board with us, call us on +91 22 66932600 / +91 484 4114141 or email info@ccsasia.com varying mineralogy retardation • Diferent cementitious materials SIKA VISCOCRETE • Durable concrete structure properties Sika ViscoCrete Superplasticizers use • Better cost performance • Varying climatic conditions admixture technology based on new • Easily pumpable to the desired height A robust Superplasticizers is the solution generation PCE polymers. PCE polymers • Sustainable concrete mix u 24 construction opportunities|SEPTEMBER 2017