Journal of Petroleum Science and Technology، جلد ۳، شماره ۱، صفحات ۱-۷
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عنوان انگلیسی AN EXPERIMENTAL INVESTIGATION ON IMPROVING THE MEDIUM AND LATE-AGE COMPRESSIVE STRENGTHS OF CLASS G OIL WELL CEMENT
چکیده انگلیسی مقاله In this study, the effects of particle size distribution improvement and dense packing techniques on the 28- and 90-day compressive strengths of class G oil well cement have been investigated. It was observed that limited improvements in the particle size distribution of cement (regarding industrial possibilities) cannot result in a significant increase in 28- and 90-day compressive strengths. Also, in the application of the dense packing technique, silica fume and limestone powders with the grain size less than 45 micrometers cannot be utilized as substitutes for cement, because the addition of these materials simultaneously leads to the shortening of the setting times. The utilization of quartz powder as a filler exhibits partial pozzolanic properties at optimum substitution percentages, i.e. around 6 to 10% by weight; however, it can result in an almost 7% increase in the 28-day compressive strength of the hardened paste of the cement without any considerable effects on its setting times.
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نویسندگان مقاله علی اله وردی |
cement research center, school of chemical engineering, iran university of science and technology tehran, iran
سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

ابراهیم نجفی کانی | najafi kani
school of chemical, petroleum, and gas engineering, semnan university, semnan, iran
سازمان اصلی تایید شده: دانشگاه سمنان (Semnan university)

شادی سلطانی |
cement research center, school of chemical engineering, iran university of science and technology tehran, iran
سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

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