Strength Enhancement in Type K Expansive Cement Using Additives

Type K cement belongs to a special class known as shrinkage‐compensating cement. A literature survey reveals that very little research has been conducted on the performance of this type of cement when additives are used with it. The writer studies the physical, chemical, and microstructural characteristics of a type K cement to which up to 10% of a silica fume and a superplasticizer are added. Several techniques, such as conduction calorimetry, X‐ray diffraction, thermal analysis, and SEM/EDXA are used for this investigation. It is demonstrated that significant strength increase can be obtained through the use of additives in type K cement. Changes in rheological properties, however, can result from such additions. Adjustments in the amount of sulphate and aluminate components may lead to better control of setting and viscosity in this cement.