Sulfoaluminate-belite cement from low-calcium fly ash and sulfur-rich and other industrial by-products

被引：182
作者：
Arjunan, P [1 ]
Silsbee, MR [1 ]
Roy, DM [1 ]
机构：
[1] Penn State Univ, Mat Res Lab, University Pk, PA 16801 USA
来源：
CEMENT AND CONCRETE RESEARCH | 1999年 / 29卷 / 08期
关键词：
hydration; Ca2SiO4; 3CaO center dot 3Al(2)O(3 center dot)CaSO(4); sulfate; waste management;
D O I：
10.1016/S0008-8846(99)00072-1
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The study describes the preparation and characterization of an environmentally friendly cement with performance characteristics similar to those of Portland cement, from a lime kiln bag house dust, a low-calcium fly ash, and a scrubber sludge. Promising preliminary results show the formation of relatively low-temperature phases calcium sulfoaluminate (4CaO . 3Al(2)O(3). SO3) and dicalcium silicate (2CaO . SiO2) at similar to 1250 degrees C if nodulized raw meal is used for clinker preparation and at 1175 degrees C if powdered raw meal is used as compared to the similar to 1500 degrees C sintering temperature required for Portland cement. Phases of the developed cements were predicted using modified Bogue calculations. Isothermal calorimetric measurements indicate the hydration properties of the cements are comparable to ordinary Portland cement. Mechanical properties and microstructural evaluations also were carried out. (C) 1999 Elsevier Science Ltd. All rights reserved.
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页码：1305 / 1311
页数：7
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