Master of Science, The Ohio State University, 2012, Civil Engineering
As society moves into the future, environmental concerns such as global warming increase due to human activity (U.S. EPA 2009:2). In construction, the use of cement in concrete contributes to this problem. Scientists and Engineers believe building green, yet durable, is the key to solving this problem. To achieve this goal, researchers must move backward in time to examine how our predecessors built their structures without modern technology, and then they can incorporate the techniques that were used to reduce waste.
One of the most qualified structures to examine is the Great Wall of China. The technology they used was not only environmentally friendly, but the structure is also very durable. Some parts of the structure that were built over two thousand years ago still exist today.
The research is focused on Ming and Pre Ming dynasty. The research centers on the similarities and differences between the two time periods in construction techniques. Since the Great Wall is very long in length, this research and the research methods mentioned below are limited to Beijing, Hebei and Gansu province.
The author found out that the main construction method that was used was rammed earth. The rammed earth method is a technique of building walls by compressing the raw materials such as earth, gravel and lime into the shape of a wall. The construction materials that they used to construct the Great Wall were mainly fire kiln bricks and mud bricks. Fire kiln bricks are made through chemical change when the clay is fired up in the kilns until it is vitrified. Mud bricks, on the other hand, are made through a physical change by letting the bricks dry out in the sun. The main transportation of the material to construct the Great Wall was using a class 2 lever wheelbarrow, though the workers used animals as well.
Since the Great Wall was built a long time ago, many historical records and documents were lost or destroyed. The methods listed above are not binary, meaning they (open full item for complete abstract)
Committee: Fabian Tan (Advisor); Frank Croft (Committee Member); Shive Chaturvedi (Committee Member)
Subjects: Civil Engineering