Comparative Analysis of Tunnel Formwork System and Aluminum Formwork System for High Rise Buildings

Comparative Analysis of Tunnel Formwork System and Aluminum Formwork System for High Rise Buildings

Kalbhor Shailesh S

PG Student Civil – Construction management Rajarambapu Institute of Technology, Rajaramnagar,Sangali

Abstract The high rise building construction consist of number of repetitive activities and also have same identical floors. The increase in duration of construction greatly affects the construction cost. Selection of best formwork system gives best result in cost saving. Formwork consist of 20-25% of total cost of project[2]. So that used advanced formwork system helps in cost saving as reduction slab cycle time. This study is done for comparative analysis of tunnel formwork system and aluminum formwork used for high rise building construction.

Keywords Formwork, High Rise Building, Tunnel Formwork , Cost

1. INTRODUCTION

   The high rise building involves high cost investment which is increased day by day as delay in execution is occurred formwork systems are key factors in determining the success of a building construction project in terms of cost, speed, quality and safety of work. Selecting poor quality of formwork systems in aiming to minimize the cost of project will directly affect the speed and quality of construction. According to the National building code of India, a tall building is one with four floors or more or a high-rise building is one 15 meters or more in height. . The formwork used in construction project contain 20-25% cost of project[2], so that selection of best suitable formwork for high rise building will result in successful completion of project.

   The formwork can be defined as the temporary structure which is used to support the fresh concrete until it gain its own strength. The Formwork selection for high rise building is depend upon the cost , time and finishing quality. High rise building construction consist of many type of repetitive activity. For repetitive work and high rise building construction Tunnel formwork system and aluminum formwork system is developed.

2. TUNNEL FORMWORK SYSTEM

   The tunnel formwork is room formwork in which RCC slab and walls are casted in continuous pour. Then By Using hot air blows thermal curing is used for accelerate the concrete. The cycle Time for tunnel formwork system is 1-3days only, The tunnel formwork system is very useful for repetitive room design.

   Operational cycle

   The 24 Hour cycle defines the works to be done each day. To establish this cycle, the overall structure is divided into a number of more or less similar construction phases,

   Dr. A. C. Attar

   Professor Department of Civil Engineering

   Rajarambapu Institute of Technology,

   Rajaramnagar,Sangali

   corresponding to a days work. The necessary manpower and equipment are then determined according to the size of these phases. To reach maximum efficiency, the phases done every day are similar.

   The cycle is divided into the following activities:

   1. Initial striking operations

   2. Movement of forms

   3. Final preparation

   4. Pouring

3. ALUMINIUM FORMWORK SYSTEM Aluminium formwork also known as MIVAN technology..

   MIVAN system is formwork construction, cast in situ concrete wall and floor slabs cast monolithic provides the structural system in one continuous pour. Large room sized forms for walls and floors slabs are erected at site. These forms are made strong and sturdy, fabricated with accuracy and easy to handle. They afford large number of repetitions (around 250).

   Operational cycle time

   Sr.no	Activity
   1	Wall Shuttering
   2	Slab Shuttering
   3	Prob Install
   4	Slab level
   5	Leveling
   6	Line and plumb
   7	Wall reinforcement
   8	Slab Reinforcement
   9	Electrical fitting
   10	Casting of slab
   11	De shuttering wall
   12	De shuttering slab

4. OBJECTIVES

   1] Collection of primary and secondary data

   2] Comparison of Tunnel formwork system and aluminum formwork system used for high rise building construction on time cost quality and its characteristics parameters.

   3] Techno-Economical analysis of both formwork system

5. METHODOLOGY

   For data collection questionnaires was prepared on the basis of objectives of the project. Then for questionary survey and data collection two different sites were studied, Rohan Builders India Pvt Ltd. is using Tunnel Formwork System and Tricon Infra Buildtech Pvt Ltd using aluminiumsystem.

   Case Study 1	Case study2
   RohanAbhilasha,wagholi	PanchshilHighrise,Wagholi
   Residential	Residential
   Tunnel Formwork System	Aluminium Formwork System
   MESA Imalat Hi TekInsat	Tricon Infra Buildtechpvt .Ltd.

   Case study Details

6. DATA COLLECTION A] Data Collected from Interview

   Sr.No	Parameters
   1	Cost
   	Initial Invesment	High
   	Avg cost/m2	25000/m2
   	Labour Cost/m2	200/m2
   2	Numbers of repetations	500
   3	Cycle time	3days
   4	Deshuttering time	10hrs
   5	Manpower requirments	55-60Nos/slab area
   6	Accuracy	+- 3mm
   7	Durability	High
   8	Wastage of material	0%
   9	Additional Equipment Requirements	Tower crane, Concrete Spreader
   10	Curing method	Thermal curing
   11	Finishing	Paint Finish

   From Case study 1 Rohan Builders:

   From Case Study 2 Tricon Infra Buildtech

   Sr.No	Description
   1	Initial Investment(for Project)	High
   2	Average cost/sq.m	8500
   3	Labour cost / sq.m	165
   4	Maintenance cost	10
   5	Storage cost	02
   6	Cycle time	12days
   7	Size of panel	600*2050
   8	Weight of panel	8.50kg/sq.m
   9	Salvage value	50% of cost
   10	Number of repetitins	110Nos
   11	De-shuttering time	24hrs
   12	Additional Equipment requirement	Staff and material
   13	Manpower requirement	3labour/day/sq.m
   15	Durability	High
   16	Finishing	Fine
   17	Percentage of wastage	0%
   18	Accuracy	+-5mm
   19	Curing method	Curing compound

7. DATA ANALYSIS General Comparative statement

   Sr.No	Description	Tunnel formwork	Aluminium Formwork
   1	Initial Investment(for Project)	High	High
   2	Average cost/sq.m	25000rs	8500rs
   3	Labour cost / sq.m	175-200/slab area	165
   4	Maintenance cost		10
   5	Storage cost		02
   6	Cycle time	24hours	12days
   7	Size of panel	1 to 4 m	600*2050
   8	Weight of panel	2-4 tonne	8.50kg/sq.m
   9	Salvage value		50% of cost
   10	Number of repetitions	500nos	110Nos
   11	De-shuttering time	10hrs	24hrs
   12	Additional Equipment requirement	Tower crane & boom placer	Staff and material
   13	Manpower requirement	55-60nos /slab	3labour/day/sq.m
   14	Permissible fresh concrete pressure	NA	NA
   15	Durability	High	High
   16	Finishing	Paint finish	Fine
   17	Percentage of wastage	0	0%
   18	Accuracy	+-3mm	+-5mm
   19	Curing method	Thermal curing	Curing compound
   20	Casting System	RCC monolithic	RccFramed

   Initial Cost/m2

   Type	Unit	Rate
   Tunnel Formwork	Sq. mt	25000 Rs
   Aluminium Formwork	Sq. mt	8500 Rs

   Cycle Time (days)

   Type	Days
   Tunnel Formwork	3 days
   Aluminium Formwork	14 days

   Numbers of repetitions

   Type	Nos.
   Tunnel Formwork	500
   Aluminium Formwork	200

   Cost Analysis for Numbers of repetitions

8. CONCLUSION

   From Data analysis and study of both formwork system it is concluded that initial cost/sq.m for tunnel formwork is high But as the numbers of repetations increases tunnel formwork system is best suitable after 500 nos repetations. So that Aluminium formwork can be used for 200 repetations.

9. REFERENCES

1. Sandip P. Pawar and P.M.Atterde (June 2014) Comparative analysis of formwork in multistory building. IJRET,Volume;03 Special issue;09

   June 2014

2. ArbazKazi and FauwazParkar (Dec 2015) Comparative study and decision making for formwork technique to be adopted on construction site in Mumbai IJRET Volume; 04 Issue; 12 Dec 2015

3. Hisham A. Abou Ibrahim and Farook R. Hamzeh (April 2016) Role of Formwork system in High Rise building construction

   The masterbuilder april 2016

4. K.Loganathan and K.E.Viswanathan ( April 2016) A study on Cost, Duration and Quality analysis of different formworks in high rise building IJSER Volume 7; Issue 4 April 2016

5. Tejas D. Aradhye and Emeritus M.R.Apte ( May 2016 )

   Study of Advanced tunnel formwork system in high rise building

   IJRET Volume; 05 Issue; 05 May 2016

6. National Building code of india 2005