CORE Metadata, citation and similar papers at core.ac.uk Provided by National Academic Repository of Ethiopia Addis Ababa Science & Technology University School of civil engineering and Construction Technology and Management (Department of Construction Technology & Management) Assessment on Reducing Plastering Cost in Addis Ketema Sub City Condominium Project BY SALIHIN BEKRI OMER A project submitted to The School of graduate studies of Addis Ababa Science and Technology University in partial fulfillment of the requirement for the degree of Master of Engineering in Construction Technology and Management JUNE 2016 Assessment on Reducing Plastering Cost in Addis Ketema Sub City Condominium Project 2016 Table of Contents Table of Contents .................................................................................................................................... i List of Figure .......................................................................................................................................... iii List of Table............................................................................................................................................ iv Abstract .................................................................................................................................................... v CHAPTER ONE - INTRODUCTION ........................................................................................................... 1 1.1 BACKGROUND ........................................................................................................................... 1 1.2 STATEMENT OF THE PROBLEM.............................................................................................. 2 1.3 RESEARCH OBJECTIVE ............................................................................................................ 2 1.4 SCOPE AND LIMITATION OF THE STUDY .............................................................................. 3 1.5 SIGNIFICANCE OF THE STUDY ............................................................................................... 3 CHAPTER TWO - LITRATURE REVIEW ................................................................................................... 4 2.1 DEFINITIONS ......................................................................................................................... 4 2.2 USES OF PLASTERING .......................................................................................................... 4 2.3 TYPES OF PLASTERING ........................................................................................................ 5 2.4 APPLICATION OF PLASTER .................................................................................................. 6 2.5 COATS OF PLASTERING ....................................................................................................... 6 2.5.1 Scratch coat plastering .................................................................................................. 6 2.5.2 Brown coat plastering..................................................................................................... 7 2.5.3 Finish coat application ................................................................................................... 7 2.6 DELAY BETWEEN COATS ..................................................................................................... 7 2.7 PLASTERING FINISHES: ........................................................................................................ 8 2.8 THICKNESS OF PLASTERING................................................................................................ 9 2.8.1 Recommended thickness of cement plastering .......................................................... 9 2.8.2 Local Code and Standard ............................................................................................. 11 2.8.3 International Codes and Standards ............................................................................. 11 i Masters Program –AASTU, Department of Construction Technology and Management Assessment on Reducing Plastering Cost in Addis Ketema Sub City Condominium Project 2016 2.9 STEPS IN PLASTERING WORK............................................................................................ 12 2.10 MIX RATIO FOR CEMENT SAND PLASTERING ................................................................... 14 2.11 DEFECTS IN PLASTERING .................................................................................................. 14 2.12 MORTAR WASTAGE AND PLASTERING ............................................................................. 15 CHAPTER THREE- RESEARCH METHODOLOGY ................................................................................... 16 3.1 INTRODUCTION ...................................................................................................................... 16 3.2 RESEARCH APPROACH AND TECHNIQUES .......................................................................... 16 3.3 DATA AND INFORMATION SOURCE ...................................................................................... 17 3.4 POPULATION AND SAMPLING............................................................................................... 17 CHAPTER FOUR- RESULT AND DISCUSSION ........................................................................................ 19 4.1 GENERAL ................................................................................................................................. 19 4.2 EFFECT OF BLOCK WORK ON PLASTERING ......................................................................... 20 4.3 EFFECT OF CONCRETE WORK ON PLASTERING.................................................................. 21 4.4 PLASTERING WORK ................................................................................................................ 23 4.4.1 Profitability of Plastering ............................................................................................. 23 4.4.2 Plastering Thickness ...................................................................................................... 24 4.4.3 Mortar Wastage .............................................................................................................. 26 4.4.4 Plastering Cost Calculation ........................................................................................... 27 CHAPTER FIVE- CONCLUSION AND RECOMMENDATION .................................................................... 32 5.1 CONCLUSION .......................................................................................................................... 32 5.2 RECOMMENDATION ................................................................................................................ 33 BIBLIOGRAPHY ....................................................................................................................................... 34 Annex ...................................................................................................................................................... 35 ii Masters Program –AASTU, Department of Construction Technology and Management Assessment on Reducing Plastering Cost in Addis Ketema Sub City Condominium Project 2016 List of Figure Figure 1 plastering work application [16]........................................................................................... 13 Figure 2 sketch showing how to check level of wall [16] ................................................................. 13 Figure 3 Reasons for poor quality Block work in the site by the respondents .............................. 21 Figure 4 concrete quality in the site by respondents with respect to size and dimension......... 21 Figure 5 Chiseling Bulged beam (block E1, 12) .................................................................................. 23 Figure 6 Reason given by respondents for concrete profitability ................................................... 23 Figure 7 Thick plastering blockE2 ........................................................................................................ 24 Figure 8 Shows that nearly 4cm plastering thickness (block 24) .................................................... 25 Figure 9 Shows that more than 5cm thick plastering around stair case (block 2 E1) .................. 25 Figure 10 show wastage percentage In the site ................................................................................. 27 iii Masters Program –AASTU, Department of Construction Technology and Management Assessment on Reducing Plastering Cost in Addis Ketema Sub City Condominium Project 2016 List of Table Table 1 Recommended plastering thickness by uniform building code, California ....................... 9 Table 2 New Zealand standard for plastering thickness [13] .......................................................... 11 Table 3 united states standard for plastering thickness [14] .......................................................... 12 Table 4 Recommended mix ratio for cement plastering [7] ............................................................ 14 Table 5 Population and sample for questionnaire ............................................................................. 18 Table 6 responses for questionnaire .................................................................................................... 20 iv Masters Program –AASTU, Department of Construction Technology