Characterization of PCC Cement by Addition of Napa Soil from Subdistrict Sarilamak 50 Kota District as Alternative Additional Material for Semen Padang

2nd International Conference on Mathematics, Science, Education and Technology

数学;自然科学;教育

Mawardi, M.^1 ; Deyundha, D.^1 ; Zainul, R.^1 ; Zalmi, P.R.^1

Chemistry Department, Faculty of Mathematics and Science, Universitas Negeri Padang, Jln. Prof.Dr.Hamka Air Tawar, Padang

25131, Indonesia^1

关键词: Composite cements;    Initial setting time;    Insoluble residue;    Natural materials;    Setting time;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/335/1/012034/pdf
DOI  :  10.1088/1757-899X/335/1/012034

来源: IOP

【 摘 要 】

The study has been conducted to determine characteristics of the portland composite cement by the addition of napa soil from Sarilamak subdistrict, 50 Kota District as an alternative additional material at PT. Semen Padang. Napa soil is a natural material highly containing silica and alumina minerals so that it can be one of material in producing cement. This study aims to determine the effect of napa soil on the quality of portland composite cement. Napa soil used in the variation compositions 0%, 4%, 8%, 12% and 16%, for control of cement used 8 % of pozzolan and 0 % of napa soil. Determination of cement quality by testing cement characteristics include blaine test, sieving, lost of ignition or LOI, insoluble residue, normal consistency, setting time and compressive strength. Cement was characterized using XRF. Fineness of cement decreases with the addition of napa soil. Lost of Ignition of cement decreased, while the insoluble residue increased with the addition of napa soil. Normal consistency of cement increasing, so does initial setting time and final setting time of cement. While the resultant compressive strength decreases with the addition of napa soil on 28 days, 342, 325, 307, 306, and 300 kg / cm2.