• Leni Rumiyanti Universitas Lampung
  • Listiani Listiani Department of Physics FMIPA Lampung University Jl. Prof. Dr. Sumantri Brojonegoro No 1, Bandar Lampung 35144
  • Tika Damayanti Department of Physics FMIPA Lampung University Jl. Prof. Dr. Sumantri Brojonegoro No 1, Bandar Lampung 35144
Keywords: Lahat fly ash, PCC cement, the chemical quality of cement, physical quality of cement


Research has been carried out on the optimization of the use of Lahat Fly Ash as an Additive Portland Composite Cement (PCC) which aims to determine the optimum conditions for adding Lahat fly ash to produce cement with physical and chemical requirements in accordance with SNI 7064:2014 and discover the ideal composition of cement with fly additions Lahat ash from various cement compositions. The quality analysis in making PCC cement is chemically in the form of Insoluble Residue (IR), Loss of Ignition (LOI), and free lime (FCaO) as well as the quality of physics in the form of Blaine, setting time, and cement mortar compressive strength. The results obtained after the process of making PCC cement with the addition of 14% Lahat fly ash, namely PCC cement in optimum conditions with physical and chemical requirements in accordance with SNI 7064: 2014 where the ideal composition of PCC cement manufacture is 14% Lahat fly ash, clinker 62%, 3% gypsum, 18% limestone, and 3% pozzolans in making PCC cement. Therefore, Lahat fly ash can be used as an alternative mixture in making PCC cement.


Munir, “Utilization of Fly Ash for Quality and Safe Hollow Blocks for the Environment,” Research Report on Masters in Environmental Sciences, Diponegoro University, 2008.

Ministry of Energy and Mineral Resources of the Republic of Indonesia. 2018. 2017 Results and Outlook 2018 Mineral and Coal Subsectors. Available: http://esdm.go.id/.

Regulation of Government Regulation No. 18 of 1999 concerning Management of Hazardous and Toxic Waste.

S. P. R. Wardani, “Utilization of Fly Ash for Soil Stabilization and Other Civil Engineering Purposes in Reducing Environmental Pollution,” Journal: Faculty of Engineering, 2008.

P. Nugraha and Antoni, “Concrete Technology,” Yogyakarta: Andi Offset, 2004.

M. Farhan, “Addition of Coal Ash as a Mixed Material for Cement Making Process,” Thesis, Palembang: Sriwijaya Polytechnic, 2016.

National Standardization Agency, SNI 7064:2014, Portland Composite Cement, Jakarta.

J. B. Hariawan, “Effect of Differences in the Characteristics of Cement Ordinary Portland Cement (OPC) and Portland Composite Cement (PCC) Type on Mortar Compressive Strength,” Essay, West Java: Gunadarma University, 2007.

N. Dahliar,, S. Widodo and A. Tonggiroh, “Effect of Coal Ash Composition on Portland Cement Clinker Quality at PT Semen Tonasa Unit III,” Journal of Geoscience, Vol. 10. No. 02. Pp. 59-60, 2014.

National Standardization Agency, SNI 2049:2015, Portland Cement, Jakarta.

Hargono, M. Jaeni and F. S. Budi, “Effects of Comparison of Pozolan Cement and Portland Cement Against Form Conservation and Cement Press Strength,” Journal of the Chemical Engineering Department, Faculty of Engineering, 2003.

T. Ningsih, R. Chairunnisa and S. Miskah, “Material Utilization of Rice Husk Ash Additive at Cement Portland PT Semen Baturaja (Persero) Tbk.,” Journal of Chemical Engineering, Vol. 18. No. 4. Pp 59-66, 2012.