Pengaruh Komposisi Gypsum Terhadap Setting Time Pada Proses Produksi Semen PCC

Mala Hayati Nasution, Nevybryanti Bunga Nurcahyo Putri, Lukmilayani Candra

Abstract


Cement is a national strategic commodity. Based on data from the Ministry of Industry of the Republic of Indonesia in 2017, the total installed capacity of the national cement industry is 92.7 million tons per year with a consumption rate of 65 million tons per year. The raw materials for the cement production process are limestone, iron sand, clay, silica sand, and gypsum. A comparison of the composition of each raw material influences the type and characteristics of the cement produced. Gypsum is a raw material that affects the quality of the final cement product. Gypsum acts to regulate the hardening time and inhibits the binding time so that it can be used for a long time. This research was conducted to study the effect of gypsum composition on setting time in the Portland Composite Cement (PCC) production process. Gypsum was Tanjung Jati gypsum. Variation of gypsum composition were 0-5% -weight.  Based on SNI 15-2049-2004, the minimum initial setting time is 45 minutes and the maximum final setting time is 375 minutes. Based on the results of the research, PCC cement with 0 - 5%--weight gypsum met these standards. Increased gypsum composition causes an increase in both initial and final setting time.

Keywords


gypsum;setting time;cement;Portland Composite Cement;hydration reaction

References


Kementerian Perindustrian, Pasokan Semen Nasional 92,7 juta ton Pada Tahun 2017, http://www.kemenperin.go.id/artikel/16183/Industri-Semen, 2017.

SNI 03-6827-2002, Metode Pengujian Waktu Ikat Awal Semen Portland dengan Menggunakan alat Vicat Untuk Pekerjaan Sipil, Badan Standarisasi Nasional.

SNI 15-2049-2004, Semen Portland, Badan Standarisasi Nasional.

J.B. Hariawan, Pengaruh Perbedaan Karakteristik Type Semen Ordinary Portland Cement (OPC) dan Portland Composite Cement (PCC) terhadap Kuat Tekan Mortar, 2012, Universitas Gunadarma, Depok.

G.M. Sadiqul Islam dkk., Effect of Phosphogypsum on the Properties of Portland Cement, Procedia Engineering, Volume 171, 2017, pp. 744 – 751.

I. Purnawan dan A. Prabowo, Pengaruh Penambahan Limestone terhadap Kuat Tekan Semen Portland Komposit, Jurnal Rekayasa Proses, Volume 11, Nomor 2, 2017.

C. Chandara, K.A.M.Azizli, Z.A.Ahmad, E. Sakai, Use of Waste Gypsum to Replace Natural Gypsum as Set Retarders in Portland Cement, Waste Management, Volume 29, Issue 2, 2009, pp. 1675 – 1679.

A. Altun dan Y. Sert, Utilization of Weathered Phosphogypsum as Set Retarder in Portland Cement, Cement Concrete Research, Volume 34, Issue 4, 2004, pp. 677 – 680.

R. Boncukcuoğlu, M.T. Yilmaz, M.M. Kocakerim, V. Tosunogğlu, Utilization of Borogypsum as Set Retarder in Portland Cement Production, Cement Concrete Research, Volume 32, Issue 3, 2002, pp. 471 – 475.

W. She dkk., Utilization of Solidified Phosphogypsum as Portland Cement Retarder, Journal of Material Cycles and Waste Management, Volume 14, Issue 3, 2012, pp. 228, 233.

H. Ŏlmez dan E. Erdem. The Effects of Phosphogypsum on Setting and Mechanical Properties of Portland Cement and Trass Cement, Cement Concrete Research, Volume 19, Issue 3, 1989, pp. 377 - 384.

N. Bhanumatidas dan N. Kalidas, Dual role of gypsum: Set retarder and strength accelerator, The Indian Concrete Journal, 2004, pp. 1 – 4.

M.Singh dan M. Garg, Calcium Sulfate Hemihydrate Activated Low Heat Sulfate Resistant Cement, Construction and Building Materials, Volume 16, Issue 3, 2002, pp. 181 – 186.

Y. Erdogan, H. Genc dan A. Demirbas, Utilization of Borogypsum for Cement, Cement Concrete Research, Volume 22, Issue 5, 1991, pp. 841 - 844.

P.K. Mehta dan J.R. Brady, Utilization of Phosphogypsum in Portland Cement Industry, Cement Concrete Research, Volume 7, Issue 5, 1977, pp. 537 - 544.




DOI: http://dx.doi.org/10.26555/chemica.v6i1.13804

Article Metrics

Abstract view : 30 times

Refbacks

  • There are currently no refbacks.


 


View Chemica Stats

Lisensi Creative Commons
This work is licensed under a Commons Attribution-ShareAlike 4.0 International License.