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Research paper thumbnail of SEISMIC VULNERABILITY ASSESSMENT: A CASE STUDY OF CUET CAMPUS

4th International Conference on Advances in Civil Engineering 2018 (ICACE 2018), 2018

Chittagong University of Engineering and Technology (CUET) campus is located in the Zone III of B... more Chittagong University of Engineering and Technology (CUET) campus is located in the Zone III of BNBC 2015 Draft with a seismic zoning coefficient 0.28g based on a maximum credible earthquake of 2 percent probability of exceedance of 50 years. In this University, many of the buildings including academic and residential were constructed before building code adaptation and seismic code provision enforcement. The present study has been carried out to assess the seismic vulnerability of existing buildings in CUET campus. Multi-level performance assessment techniques, i.e., FEMA 154, Turkish Preliminary Assessment and FEMA 310 are used to evaluate the seismic performance of the buildings. In this present study, total 25 buildings of CUET campus including 11 reinforced concrete and 14 masonry structures are assessed in the level 1 investigation. The structural information found in walk-down assessment procedure is presented in the Geographic Information System (GIS). Among them, 11 buildings which are student hostels and residential buildings are selected for level two investigation based on their level of importance in building use. Finally, detailed investigation was performed for those reinforced buildings.

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Research paper thumbnail of UTILIZATION OF PLASTIC WASTE IN CONCRETE AS A PARTIAL REPLACEMENT OF FINE AGGREGATE

3rd International Conference on Advances in Civil Engineering (ICACE), CUET, 2016

The onset of industrialization and the sustained urban growth of large population causes the buil... more The onset of industrialization and the sustained urban growth of large population causes the build-up of large amount plastic wastes. Because of the non-biodegradable property of plastics, decomposition is not possible. So, they remain in the environment for a long time, pollute soil and water that creates ecological problems. If these harmful non-biodegradable materials can be substituted as a construction material by using in concrete, that will be a significant source of plastic wastes management. This paper deals with the investigation of using grinded plastic wastes as a partial replacement of fine aggregate in concrete and to find the optimum percentage of plastic that can be used in concrete without reduction of concrete strength or with a slight amount of strength reduction which are considered as negligible. Plastic wastes consist of discarded old computers, TVs, refrigerators, radios, old electrical and electronic equipment were collected at first and then grinded through using a pulverizing machine. Through ACI method, a mix design was made for concrete of grade M-28. The proportion of mixing of the grinded plastic wastes are 2 %, 4 %, 6 %, 8 % & 10 %. The specimens have been cured for 7 & 28 days. Compressive strength and Tensile strength test of concrete were conducted. As the melting temperature of the plastic is low thus it is susceptible to temperature. So, it is important to focus on the impact of heat in concrete strength when using grinded plastic. Post-heat compressive strength test was also conducted. After obtaining the data, they were analyzed by comparing with a controlled specimen. Result had showed that there was slight reduction in strength with the mix proportion of 2%, 4% and 6% of grinded plastic wastes.

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Research paper thumbnail of SEISMIC VULNERABILITY ASSESSMENT: A CASE STUDY OF CUET CAMPUS

4th International Conference on Advances in Civil Engineering 2018 (ICACE 2018), 2018

Chittagong University of Engineering and Technology (CUET) campus is located in the Zone III of B... more Chittagong University of Engineering and Technology (CUET) campus is located in the Zone III of BNBC 2015 Draft with a seismic zoning coefficient 0.28g based on a maximum credible earthquake of 2 percent probability of exceedance of 50 years. In this University, many of the buildings including academic and residential were constructed before building code adaptation and seismic code provision enforcement. The present study has been carried out to assess the seismic vulnerability of existing buildings in CUET campus. Multi-level performance assessment techniques, i.e., FEMA 154, Turkish Preliminary Assessment and FEMA 310 are used to evaluate the seismic performance of the buildings. In this present study, total 25 buildings of CUET campus including 11 reinforced concrete and 14 masonry structures are assessed in the level 1 investigation. The structural information found in walk-down assessment procedure is presented in the Geographic Information System (GIS). Among them, 11 buildings which are student hostels and residential buildings are selected for level two investigation based on their level of importance in building use. Finally, detailed investigation was performed for those reinforced buildings.

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Research paper thumbnail of UTILIZATION OF PLASTIC WASTE IN CONCRETE AS A PARTIAL REPLACEMENT OF FINE AGGREGATE

3rd International Conference on Advances in Civil Engineering (ICACE), CUET, 2016

The onset of industrialization and the sustained urban growth of large population causes the buil... more The onset of industrialization and the sustained urban growth of large population causes the build-up of large amount plastic wastes. Because of the non-biodegradable property of plastics, decomposition is not possible. So, they remain in the environment for a long time, pollute soil and water that creates ecological problems. If these harmful non-biodegradable materials can be substituted as a construction material by using in concrete, that will be a significant source of plastic wastes management. This paper deals with the investigation of using grinded plastic wastes as a partial replacement of fine aggregate in concrete and to find the optimum percentage of plastic that can be used in concrete without reduction of concrete strength or with a slight amount of strength reduction which are considered as negligible. Plastic wastes consist of discarded old computers, TVs, refrigerators, radios, old electrical and electronic equipment were collected at first and then grinded through using a pulverizing machine. Through ACI method, a mix design was made for concrete of grade M-28. The proportion of mixing of the grinded plastic wastes are 2 %, 4 %, 6 %, 8 % & 10 %. The specimens have been cured for 7 & 28 days. Compressive strength and Tensile strength test of concrete were conducted. As the melting temperature of the plastic is low thus it is susceptible to temperature. So, it is important to focus on the impact of heat in concrete strength when using grinded plastic. Post-heat compressive strength test was also conducted. After obtaining the data, they were analyzed by comparing with a controlled specimen. Result had showed that there was slight reduction in strength with the mix proportion of 2%, 4% and 6% of grinded plastic wastes.

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