@thesis{thesis,
		author={Lubis  M. Firdaus Anzala Kahfi},
		title ={Pemanfaatan Blotong Tebu dan Abu Sekam Padi Sebagai Bahan Subtitusi dalam Pembuatan Batako dengan Penambahan Sikacim Concrete Additive},
		year={2018},
		url={},
		abstract={Producing concrete blocks with the addition of cane blotong and rice husk ash can reduce the use of cement and sand in the manufacture of construction materials. This study was aimed to assess the utilization of sugar cane blotong and rice husk ash as a substitution material in the manufacture of concrete blocks with the addition of sikacim concrete additive.This research was conducted at the Laboratory of Concrete, Faculty of Engineering, University of  Sumatra Utara from June to October 2017 using 2 factorial randomized complete design. The first factor was the composition of sugar cane blotong consisting of 3 levels, namely: (7.5%, 10%, 20%) and the second was the composition of rice husk ash which consists of 2 levels, namely: (50% and 60%). 
	The results showed that A1 (7.5% blotong) had the highest compressive strength of 11.23 MPa and A3 had the fastest time early connective ie 94.18 minutes while the time the final tie, together with other treatment that was 120 minutes, whereas for the highest absorption was at A3 (20% cane blotong) i.e 4.98%. The best mix of both materials was A1B1 (7.5% and 50% cane blotong and rice husk ash) with the compressive strength of 7.2 MPa and absorption value of 3.87%.}
		}