Ongoing Research Projects
“BD-Deck 1"- a new type of bridge deck
In Bangladesh, RC girder bridges are used for spans less than 24m, PC girder bridges for 24m-48m spans, and PC box girders for spans greater than 48m. Such bridges are cast in place (CIP) systems, which require long construction periods. In this research, the concept of a new bridge deck type has been explored, named “BD-Deck 1”. This is a segmental bridge type consisting of full-depth precast, pre-stressed concrete panels (PCP), jointed together by pre-stressing strands post-tensioned at the ends. This bridge deck system will use the existing designs of RC and PC girders, but will replace the cast-in-place (CIP) bridge deck with PCP full-depth panels. The proposed bridge type will be much more cost-effective, rapid in construction and have a longer service life with minimal maintenance.
In Bangladesh, RC girder bridges are used for spans less than 24m, PC girder bridges for 24m-48m spans, and PC box girders for spans greater than 48m. Such bridges are cast in place (CIP) systems, which require long construction periods. In this research, the concept of a new bridge deck type has been explored, named “BD-Deck 1”. This is a segmental bridge type consisting of full-depth precast, pre-stressed concrete panels (PCP), jointed together by pre-stressing strands post-tensioned at the ends. This bridge deck system will use the existing designs of RC and PC girders, but will replace the cast-in-place (CIP) bridge deck with PCP full-depth panels. The proposed bridge type will be much more cost-effective, rapid in construction and have a longer service life with minimal maintenance.
Simplified Design of Reinforced Concrete Buildings of Moderate Size and Height
Web Link- http://simplifieddesignofconcretestructures.weebly.com/
The aim is to create a simplification in the design process with minimum user input. The design aids in the form of graphs, are being generated for regular cases- residential/commercial. The scope is limited to moderate size and height buildings. A website has been created to benefit the user- free to use.
Web Link- http://simplifieddesignofconcretestructures.weebly.com/
The aim is to create a simplification in the design process with minimum user input. The design aids in the form of graphs, are being generated for regular cases- residential/commercial. The scope is limited to moderate size and height buildings. A website has been created to benefit the user- free to use.
Effect of Water to Cement Ratio and Age on Portland Composite Cement Mortar Porosity, Strength and Evaporation Rate
Durability and the compressive strength of concrete are directly related to the porosity, which is mainly dependent on Water to cement ratio. In this research, different w/c were used with constant amount Portland Composite Cement to find out whether the mortar porosity decreases significantly over time, after 28 days of water curing, while kept in air and if there is any interaction effect between the age of the mortar and different w/c; regarding porosity. It was also intended to find out if water-loss rate variation with different w/c has similar trend as porosity variation with different w/c.
Durability and the compressive strength of concrete are directly related to the porosity, which is mainly dependent on Water to cement ratio. In this research, different w/c were used with constant amount Portland Composite Cement to find out whether the mortar porosity decreases significantly over time, after 28 days of water curing, while kept in air and if there is any interaction effect between the age of the mortar and different w/c; regarding porosity. It was also intended to find out if water-loss rate variation with different w/c has similar trend as porosity variation with different w/c.
Compressive strength gain and Porosity reduction at different Days for OPC and PCC cement
This research focuses on the strength variation of European standard CEM I - Ordinary Portland Cement (OPC) and European standard CEM II - Portland Composite Cement (PCC) at different days as well as the porosity variation in different conditions and days. The porosity was measured for the duration under water, 28 days and in air after that. The aim of this study is to ascertain the effect of porosity and its corresponding compressive strength of mortars. This research reveals that OPC cement gains early age high compressive strength where as PCC cement gains high compressive strength at long age. The porosity reduction characteristics of OPC and PCC also differ, which can be attributed to pozzolanic reaction of PCC.
This research focuses on the strength variation of European standard CEM I - Ordinary Portland Cement (OPC) and European standard CEM II - Portland Composite Cement (PCC) at different days as well as the porosity variation in different conditions and days. The porosity was measured for the duration under water, 28 days and in air after that. The aim of this study is to ascertain the effect of porosity and its corresponding compressive strength of mortars. This research reveals that OPC cement gains early age high compressive strength where as PCC cement gains high compressive strength at long age. The porosity reduction characteristics of OPC and PCC also differ, which can be attributed to pozzolanic reaction of PCC.
Finding out the predictive compressive strength of concrete with brick chips as coarse aggregate
The aim is to come up with a predictive model using brick chips and stone chips. Concrete cylinders Compressive strengths are being measured at different days with known mix design. Also, we are collecting data from large and small projects.
The aim is to come up with a predictive model using brick chips and stone chips. Concrete cylinders Compressive strengths are being measured at different days with known mix design. Also, we are collecting data from large and small projects.
Simple Sound Technique to Assess Mortar and Concrete
The aim is to develop a method to collect and analyze simple sound data recorded upon hitting mortar/concrete surface to assess the quality.
The aim is to develop a method to collect and analyze simple sound data recorded upon hitting mortar/concrete surface to assess the quality.
Water absorption Meter
The aim is to develop a simple meter to measure water absorption similar to RILEM standard to be used with mortar/concrete surface which will be related to durability, porosity etc.
The aim is to develop a simple meter to measure water absorption similar to RILEM standard to be used with mortar/concrete surface which will be related to durability, porosity etc.
AUST undergraduate Projects under Dr. Latifee
Please click below for Project, students involved, copy of the submitted undergraduate project and thesis
drlatifeesproject.weebly.com/aust-undergraduate-projects.html
http://drlatifeesproject.weebly.com/aust-undergraduate-projects.html
Please click below for Project, students involved, copy of the submitted undergraduate project and thesis
drlatifeesproject.weebly.com/aust-undergraduate-projects.html
http://drlatifeesproject.weebly.com/aust-undergraduate-projects.html