Microwave sintering of sulphoaluminate cement with utility wastes

详细信息    查看全文

• 作者：Li ; Haoxuan ; Agrawal ; Dinesh K. ; Cheng ; Jiping ; Silsbee ; Michael R.
• 关键词：Microwave sintering ; Sulphoaluminate belite cement ; Industrial by-products ; X-ray diffraction ; Hydration
• 刊名：Cement and Concrete Research
• 出版年：2001
• 出版时间：September, 2001
• 年：2001
• 卷：31
• 期：9
• 页码：1257-1261
• 全文大小：214 K

文摘

Class C flyash, baghouse dust and scrubber sludge have been successfully used for sulphoaluminate belite (SAB) cement preparation by microwave sintering. For proper raw mix proportioning, the modulus of gehlenite (C₂AS)¹ formation (MG) and modulus of calcium sulphosilicate (2C₂S·CS) formation (MS) were put forward. The results indicated that, when MG and MS were 0.90–1.10, C₂AS and 2C₂S·CS could be chemically eliminated when microwave-sintered at low temperature; with the 1150°C/10 min sintering condition, microwave-prepared sample had developed into SAB cement clinker with the main phases of C₄A₃S and β-C₂S, while a conventionally fired one had not; with proper gypsum addition, microwave-prepared SAB cement developed strength similar to Type-I cement in 28-day hydration.