Effect of Barium Oxide on the Formation and Coexistence of Tricalcium Silicate and Calcium Sulphoalu

• 作 者: 陈琳 沈晓冬
• 机 构: State Key Laboratory of Materials-oriented Chemical Engineering,Nanjing University of Technology,
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2009年03期
• 关键词: coexistence Portland calorimetry silicate expanded minerals adding shrinkage vis

Formation and coexistence of tricalcium silicate (C3S) and calcium sulphoaluminate ( C 4 A 3s ) minerals in Portland cement clinker containing calcium sulphoaluminate were investigated. The f-CaO content, mineral composite and formation of mineral in the clinker were analyzed respectively by chemical analysis, differential scanning calorimetry(DSC) and X-ray diffraction. The results show that, adding a suitable amount of BaO can improve the burnability of raw meal and promote the f-CaO absorption. Tricalcium silicate and calcium sulphoaluminate minerals can form and coexist in clinkers at 1 234-1 317 ℃ by the addition of BaO to the raw meal. A suitable amount of BaO expanded the coexistence temperature of two minerals by 58 ℃ .

Formation and coexistence of tricalcium silicate (C3S) and calcium sulphoaluminate (C 4 A 3s) minerals in Portland cement clinker containing calcium sulphoaluminate were investigated. The f-CaO content, mineral composite and formation of mineral in the clinker were analyzed respectively by chemical analysis , differential scanning calorimetry (DSC) and X-ray diffraction. The results show that, adding a suitable amount of BaO can improve the burnability of raw meal and promote the f-CaO absorption. Tricalcium silicate and calcium sulphoaluminate minerals can form and coexist in clinkers at 1 234-1 317 ° C by the addition of BaO to the raw meal. A suitable amount of BaO expanded the coexistence temperature of two minerals by 58 ° C.