Blended Cement Using Flyash for Masonry and Plastering Work

摘要

The precious portland cement essentially meant for structural application is invariably used for masonry work, where as the masonry cement still remains far from common knowledge and usage. An attempt has been made in the present study to explore the possibilities of obtaining the characteristics of masonry cement from the blend of ordinary portland cement and class F flyash. Class-F flyash was used in making masonry mortars suitable for brick joints and for plastering. The mortars were made of a locally produced mixed cement and flyash at 0% and 50% cement replacement with and without the addition of an air entraining agent/plasticizer. The testing programme includes the determination of quality of ash according to IS standard and compressive strength. The need and suitability of flyash mortar mixes along with the test results is presented in this paper. It has been observed that 28 day strength obtained using 53 grade cement and flyash is much higher than the strength requirement of masonry cement IS 3466-1988 (second revision).