Abstract:
At the present in construction industry the post tensioning method used widely due to its
advantages compare to previous time. In developing countries like Ethiopia the benefit of post tensioning slab are yet to be recognized. By using post tensioning method we can achieve the
most economical and safe design for residential as well as commercial buildings. This paper
deals with the study of comparison of reinforced and post tension slab with respect to cost
estimate and project time consumption. The cost was analyzed by using unit rate analysis. For
this application of cost estimation a commercial building is consider as a case study. The plan of
the commercial building (G+6) and above is considered. The results indicate that PT slab has
cost better than that of RC slab system. The main tools for the collection of data included
questionnaires, interviews and site visit were used to identify the various efforts that have been
made in the past to evaluate and examine the cost and time impact of post tensioning on selected
building projects. Simple statistical analysis involving tables and percentages were used in
analyze the results from the questionnaire. Secondary sources of data were obtained from
relevant literature that covered research, publication on the subject matter. The results from
analysis ranked from the first to third position by contractors, consultants and owners that the
most significant factors causing post tensioning construction on building construction projects
are:-cost factors, time factors and Operations factors respectively. The results of this study
recommend to the government there is a need to establish post tensioning department, establish
laws and policies that toward managing and application of post tensioning construction at all
levels in a construction projects, The study recommended the clients who involved in the
construction industries to take the post tensioning history of the post tensioning contractors and
as a criterion in awarding contracts and Taking training on new technology which is afford the
construction cost and good applicable on our country to participate and invest on it. The study
recommended the consultants to give attention to new technology that is affordable and
applicable.
