• Cement Symposium
• /
• no.29
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• pp.50-57
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• 2002

• Cement Symposium
• /
• no.30
• /
• pp.146-152
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• 2003

• Cement Symposium
• /
• no.23
• /
• pp.83-91
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• 1995

• Cement Symposium
• /
• no.24
• /
• pp.75-81
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• 1996

• Cement Symposium
• /
• no.20
• /
• pp.119-125
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• 1992

• Cement Symposium
• /
• no.21
• /
• pp.108-115
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• 1993

• Proceedings of the Korea Concrete Institute Conference
• /
• 2008.11a
• /
• pp.549-552
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• 2008

The cement is accomplished with CaO, SiO2, Al2O3 and Fe2O3, etc. After pulverizing materials of the limestone, the sand and the clay(shale), iron ore, the cement becomes clinker materials sintering from the rotary kiln of oxidizing atmosphere. The part in the materials of the clinker is substituted with slag, sludge etc. and it is used. because The chromium which is to be included in the clinker materials, in sintering process hexavalent chromium is converted with the chrome. Consequently it changed the type and a content of clinker materials and test hexavalent chromium of the clinkers which is manufactured.

• Cement Symposium
• /
• no.19
• /
• pp.54-58
• /
• 1991

• Cement Symposium
• /
• no.12
• /
• pp.23-29
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• 1984

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.11 no.3
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• pp.218-225
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• 2023

In this study, we examine the feasibility of using chlorine in clinker as an early-strength cement by the effect of accelerating the cement hydration reaction of chlorine. Clinker with a chlorine content of 200-1,000 ppm was prepared using actual cement kilns, and 46 cement samples were prepared by adding gypsum and admixtures(GGBFs and limestone). We measured consistency, setting, 1-28 days compressive strength and analyzed them statistically. Test results indicated that an increase of the chlorine content resulted in shortening of initial and final setting time and the improvement of 1 day compressive strength. But the 28 days compressive strength was decreased. Specifically, when the chlorine content was increased from 230 to 965 ppm, the 1 day compressive strength increased up to 4.6 MPa, improvement effect was superior to that of increasing Blaine in the range of 3,400-3,970 cm²/g.