Evaluation of Sulphate Resistant Cement and Oil-well Cement Produced in Al-Hadbaa Cement Plant
Iraqi National Journal of Earth Sciences,
2021, Volume 21, Issue 2, Pages 43-59
AbstractTwenty-three samples are collected (9 samples of sulfate-resistant cement, 7 samples for each of the oil-well cement, class B and G) during four months from the production line of Al-Hadbaa cement plant, which operates in the wet production method, in Hammam Al-Alil district south of Mosul city. The research aims to evaluate the chemical and physical properties of sulfate-resistant cement and oil-well cement produced in the studied plant according to the approved standard specifications. Some of the samples are analyzed by X-ray diffraction device, and chemically by X-ray fluorescence and gravimetric titrimetric chemical methods. The results of physical tests are obtained (fineness by Blaine method and sieves, water-cement ratio, setting time (initial and final), soundness by autoclave method, and compressive strength) for cement of three types according to the requirements of the Iraqi Standard Specification (no.5, 1984). As well as the results of physical tests (mixing water percent, fineness, slurry density, thickening time, free fluid content, compressive strength, and dry cement density) for oil-well cement are according to the requirements of the American Petroleum Institute specifications for the samples taken from Al-Hadbaa cement plant, which is carried out within the requirements of quality control overproduction.
The study concludes that the results of chemical analysis, calculating some of the chemical moduli, percent of mineral phases, and results of physical tests for three types of cement are close in their values, and conforming to the limits of chemical and physical requirements of the Iraqi Standard Specification (no.5, 1984). Except that the aluminate phase C3A content, which is more than the required limit. The results of chemical analysis, calculating the percent of mineral phases, and the results of physical tests for the studied oil-well cement are in conformity to the limits of chemical and physical requirements of the American Petroleum Institute Specifications (API 10A, 2010), for the cement type of moderate resistant for sulfate (class B and G). Except for the values of alite phase C3S content, and alkalis (sodium) equivalent Na2OEQ for class G, which are not conforming to specifications.
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