Research Lab:
Concrete Laboratory

research

Research Lab: Concrete Laboratory

Leader of the Research Group: Prof. Dr. Md. Tarek Uddin

The Concrete Lab of the Department of Civil and Environmental Engineering (CEE) is conducting research works related to recycling, durability, and sustainability of construction materials. The research facilities of the lab are continuously improving to make it as a Center of Excellence for doing research work in the field of cement based construction materials. The research results of the laboratory are regularly published in the national and internationally renowned journals and conference proceedings. Currently, several groups of under-graduate and post-graduate students are doing research work on the following topics:

Effect of Aggregate Size and Sand to Aggregate Volume Ratio on the Properties of Concrete

To understand the variation of compressive strength and workability of concrete with the change of aggregate size and sand to aggregate volume ratio, a research project was planned. A student enrolled for the Degree of Master of Science in Civil Engineering was engaged with this research work and successfully completed the research project recently. More than 600 concrete cylinders were made and investigated. Based on the results of this research project, a technical paper was published recently in the Journal of Ultrasonics of Elsevier.

Fig. Section of Concrete Specimens Made with Different Maximum Aggregate Size (MAS)


Effect of Type of Chemical Admixture and Sand to Aggregate Volume Ratio on the Properties of Ready Mixed Concrete (RMC)

The use of ready mixed concrete (RMC) is becoming popular in Bangladesh. To keep RMC workable at the construction site, different kinds of plasticizers and superplasticizers are used. However, no studies have been conducted to identify the most effective type of plasticizer/superplasticizer with respect to the local environment in Bangladesh as well as local materials used in Bangladesh for making RMC. A student enrolled in the Master of Science in Civil Engineering program is conducting this research project. It is expected to complete this project by the mid of Year 2016. This research project has been sponsored by the The Structural Engineers Limited (SEL), Dhaka, Bangladesh.

Fig. Testing of Concrete Samples in UTM


Utilization of Steel Slag in Concrete as Coarse and Fine Aggregate

A significant amount of steel slag is produced during production of steel. This by-product can be utilized in concrete as coarse and fine aggregate. Therefore, to investigate the possibility of utilization of steel slag in concrete as coarse and fine aggregate, a research project has been initiated with the financial support from Bangladesh Steel Re-Rolling Mills Limited. A student enrolled in Master of Science in Civil Engineering is working on this research project. More than 500 concrete cylinders were made with different types of aggregate, replacement ratio, W/C, and s/a. This project will be completed by the end of Year 2016.

Fig. Different Types of Slag Aggregates


Relationship between UPV and Compressive Strength of Concrete for Different Types of Aggregate

To formulate the relationships between UPV and compressive strength of concrete, a research project has been initiated in 2015. The types of aggregates were brick chips, stone chips, black stone chips, and round shaped stone aggregate. Concrete specimens were made by varying type of aggregates, s/a, W/C and tested accordingly for UPV, compressive strength, tensile strength, and modulus of elasticity. Several relationships are proposed between UPV and compressive strength of concrete for different aggregates. This work will be completed by the end of Year 2016.

Fig. Different Types of Coarse Aggregates Commonly Used in Bangladesh


Fig. Measurement of UPV through Concrete


Possibility of Extraction of Metakaoline from the River Sand for Utilization with Cement

It is expected that a significant amount of metakaoline may present in the river sand of Bangladesh. To verify it, a research project has been initiated to extract metakaoline from the deposits of local rivers. The finer part of the river deposit (less than 0.015 mm) will be collected through sieving and then will be burnt at different temperature for different time periods. Mortar specimens will be made with the materials to check the reactivity of the material. If the material is reactive with the presence of lime, a part of cement can be replaced by this material. It is expected to get some preliminary research results on this project by the end of Year 2016 through the research work of a group of undergraduate student.