Self-compacting Eco Concrete: Innovation of Fly Ash and Marble Waste as Environtmentally Friendly and High Quality Concrete Materials

Zaenal Khafidho, Bagus Wicaksono, Yoga Bangun, Mj Rizqon Hasani


The development of construction in Indonesia is increasing every year, the data shows that Indonesia is the largest market of construction services in ASEAN with value of 267 billion US dollars ( 2015). This leads to the increasing need of construction materials such as concrete. With this condition, it will harm the environment because the concrete mix materials are found in nature such as cement and sand. From the problem, the researchers innovate concrete material from fly ash and marble waste with Self Compacting Concrete method. The purpose of this innovation was to produce high quality, economical and environmentally friendly concrete with Self Compacting Concrete (SCC) method. The researchers conducted V-funnel test, L.Box test, Slump Flow test and compressive strength of concrete. From the data obtained, V-funnel test on concrete was able to flow in 4 sec, L.Box had a concrete surface comparison of 1 cm, Slump Flow test had diameter of 85 cm on concrete with FC quality number 1, and the result of compressive strength of concrete was 34-45 Mpa with a preliminary design of 35 Mpa, but this result was obtained at the age of 7 days and it would get stronger at the age requirement of 28 days. The price of concrete in the market was currently IDR 1,100,000-/m3, while the SCC concrete with additional material of fly ash and marble waste was obtained the price of IDR 792,156,-/m3. So, it could save the time of 21 days and save the cost of IDR 307,800,-. Fly ash served as a replacement of cement by 30%, while marble was the replacement of aggregate to obtain maximum quality of concrete so that the concrete had called environmentally friendly. By this innovation, it can be obtained

timesaving, low cost estimation, high compressive strength and environmentally friendly concrete. 

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