@thesis{thesis,
		author={Umar  Nuraziza and Yuhanah  Tri},
		title ={Pengaruh Subtitusi Abu Batu dan Cangkang Telur Terhadap Kekuatan Beton},
		year={2020},
		url={http://156.67.221.169/3372/},
		abstract={The use of concrete as a building material has long been widely applied by the community. More than 60% of construction development projects in Indonesia use concrete. In this research, the manufacture of concrete uses stone ash which is a waste material from the production process of crushed stone used for concrete mixtures, as well as eggshells which are waste products from baking process. From these problems, a study aims at utilizing stone ash as a substitute for fine aggregate and eggshells as a substitute for cement in mixing concrete. The concrete specimen made has a diameter of 15 cm and a height of 30 cm and designed according to SNI 7656 - 2012 standard with the 5 variations proportion of the mixture which are normal concrete, stone ash mixture with variations of 0%, 10%, 20%, and 30% of the amount of fine aggregate required and eggshells as the independent variable that is 5% of the required cement amount. The test parameters are compressive strength, slump test and concrete absorption. Slump testing was conducted during the concrete manufacturing process for each variation. The absorption test was conducted the 28th day, while for the concrete compressive strength test it conducted on the 7th, 14th and 28th day. The highest compressive strength was found in the variation of 20% stone ash and 5% eggshells of 22.65 MPa with the absorption value of 4.48%.}
		}