@thesis{thesis,
		author={TAMBUN  SAMUEL SAMPE HAMONANGAN and Tanzil  Gunawan},
		title ={KAJIAN PENGARUH SUBSTITUSI SERBUK KACA DAN FLY ASH SEBAGAI PENGGANTI SEMEN TERHADAP KUAT TEKAN BETON DAN KETAHANAN TERHADAP SULFAT},
		year={2013},
		url={http://repository.unsri.ac.id/104706/},
		abstract={Concrete is a construction material that has been commonly used for buildings, bridges and
other. Concrete in use at a particular location was also vulnerable to Chemical and environmental
attack. Therefore we need additional material in the concrete mixture. Glass powder and fly ash are
additives that contain material that can bind with the help of water and speed up concrete hardening.
This research will discuss the influence of the addition of glass powder and fly ash as a
partial replacement for cement in concrete mix with water cement ratio of 0.6 and the percentage
replacement of cement by glass powder 0%, 5%, 10%, and 15% and fly ash 0%, 5%, and 10% of the
compressive strength of concrete is molded to the shape of a cylinder diameter of 15 cm and height 30
cm, then soaked in plain water and water containing sulfate. Soaking age at 7, 21, and 28 days.
The results show, that concrete immersed with plain water and water containing sulfate has
the highest compressive strength of substituted concrete with 5% glass powder and 5% fly ash with a
value of 25.97 MPa at 28 days of usual water immersion. In addition, the sulfate immersion resulted
in a decrease in the compressive strength of concrete. The decrease in compressive strength of
concrete smallest occurred in 5% powdered glass and 10% fly ash of 1.17% at 28 days. It can be
concluded, despite growing percentage of glass powder and fly ash in concrete, it can decrease the
compressive strength of concrete, but the sulfate is not significant enough to affect the compressive
strength of concrete}
		}