ANIMAL BONE AS CONCRETE MATERIAL
Of all experience regarding concrete that has been used from time to time, it is known that cement is one of the forming materials of concrete, where manufacturing cement would result in a high carbon emission that is unsafe for the environment. Because of that reason, researchers began to find an alternative material to stabilize the carbon emission from manufacturing cement.
Rully A. Safitri, a lecturer from the Muhammadiyah University of Tangerang found out that using animal bone as a substitute of cement mixture can reduce the carbon emission and also increase the concrete quality by adding the mixture of animal bone and the rice husk ash. Rice husk ash is pozzolanic reactive material and often used to increase the surface area of aggregate and other microscopic materials of cement in high-quality concrete. It performs SiO2 oxide reaction and CaO in animal bones with air produces CSH compounds that have binder properties similar to cement so that the usage of Portland cement can be reduced. From some research, it is also known that Portland cement donate 7% CO2 to the atmosphere. The difference between normal concrete and mixed concrete with animal bones is that the weight of mixed concrete with animal bones is 2% lighter than normal concrete.
This type of concrete has never been used in public because it is only created for research purposes. But from the result, it is highly probable for this type of concrete to be used in the near future.
REFERENCE: Safitri, R. A. (2019). Limbah Tulang Hewan Sebagai Bahan Pengganti Tambahan Campuran Beton