Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Purpose Many countries have started to use post-tensioned (PT) concrete because of its sustainability and low cost. However, it is not quite popular in Sri Lanka as the required knowhow and technology are not available within the country. By introducing PT concrete to the country, unwanted costs and time overruns could be eliminated from the construction projects. This paper, therefore, aims to identify the suitability and acceptability of PT concreting for/in Sri Lanka. Design/methodology/approach An extensive literature review was first carried out to gather knowledge on PT concreting. The four case studies that followed it included eight semi-structured interviews and a document review. Ten expert interviews were conducted finally to strengthen the findings of the literature review and case studies. Cross-case analysis and NVivo 11 content analysis software were used to analyze the data gathered. Findings Findings reveal that PT concreting saves cost and time of construction and that it can have a control over the resources required for construction, which makes it environment-friendly. PT concreting allows thinner concrete sections, extended spans, stiffer walls that resist lateral loads and stiffer foundations that resist the effects of shrinking and swelling soils. Originality/value It is found that PT concreting is more suitable for the construction industry in Sri Lanka than traditional concreting.

[1]  Nabil F. Grace,et al.  Flexural Behavior of Side-by-side Box-beam Bridges: A Comparative Study , 2011 .

[2]  Alan H. Mattock,et al.  The Behavior of Reinforced Concrete Corbels , 1976 .

[3]  Maher K. Tadros,et al.  PRECAST POST-TENSIONED SEGMENTAL POLE SYSTEM: U.S. Patent No. US 6,851,231 B2 , 2009 .

[4]  Łukasz Kosno,et al.  Evaluation of Precast Pre-post-tensioned Concrete Bridge Beams with the Use of GPR Method , 2016 .

[5]  Shivprakash Iyer,et al.  Ultrasonic C‐Scan Imaging of Post‐Tensioned Concrete Bridge Structures for Detection of Corrosion and Voids , 2005 .

[6]  Charles W. Dolan.  Developments in Non-Metallic Prestressing Tendons , 1990 .

[7]  Ö. Yurdakul,et al.  Strengthening of substandard reinforced concrete beam-column joints by external post-tension rods , 2016 .

[8]  I. Aoki.  A History of Concrete , 2010 .

[9]  Kuala Lumpur,et al.  Use of carbon fiber laminates for strengthening reinforced concrete beams in bending , 2011 .

[10]  Rajka Budin,et al.  Impact of hybrid system in polyester production , 2017 .

[11]  R WakchaureM.,et al.  OPTIMIZATION OF PRESTRESSED CONCRETE GIRDER , 2015 .

[12]  Maher K. Tadros,et al.  Simplified transverse post-tensioning construction and maintenance of adjacent box girders , 2012 .

[13]  Morris Schupack.  LARGE POST-TENSIONING TENDONS , 1972 .

[14]  Thomas H.-K. Kang,et al.  Combined half precast concrete slab and post-tensioned slab topping system for basement parking structures , 2016 .

[15]  Nabil F. Grace,et al.  Design Approach for Carbon Fiber-Reinforced Polymer Prestressed Concrete Bridge Beams , 2003 .

[16]  Tarja Häkkinen,et al.  Material Efficiency of Building Construction , 2014 .

[18]  Wps Dias,et al.  Distress in Prestressed Concrete Roof Girders at Cement Plant , 1994 .

[19]  Normando Perazzo Barbosa,et al.  Durability analysis of bamboo as concrete reinforcement , 2008 .

[20]  Kang Su Kim,et al.  Nonlinear analysis method for continuous post-tensioned concrete members with unbonded tendons , 2012 .

[21]  Ehsan Nikbakht,et al.  Investigation on seismic performance and functionality of self-centring post-tensioned segmental columns , 2018 .

[22]  Riadh Al-Mahaidi,et al.  Exterior post-tensioned band beam to column connections under earthquake loading , 2016 .

[23]  Marco Petrangeli,et al.  Analysis, Design and Construction of Two Extremely Skewed and Slender Post-Tensioned Concrete Bridges , 2013 .

[24]  F. Au,et al.  Experimental and numerical investigation of post-tensioned concrete flat slabs in fire , 2016 .

[25]  Lei Wang,et al.  Flexural behavior of bonded post-tensioned concrete beams under strand corrosion , 2017 .

[26]  Johan Silfwerbrand.  Sustainable concrete is more than just durable concrete , 2012 .

[27]  Nancy L. Leech,et al.  Enhancing the Interpretation of Significant Findings: The Role of Mixed Methods Research , 2004 .

[29]  Paul Zia,et al.  Behavior of Concrete Beams Reinforced with ASTM A1035 Grade 100 Stirrups under Shear , 2011 .

[30]  Andrew R.J. Dainty,et al.  A mixed methods research design for bridging the gap between research and practice in construction safety , 2014 .

[31]  Dohun Kim,et al.  Application of Post-Tension Technology on Tall Buildings , 2017 .