Abstract
ABSTRACT
One of environmental pollution and global warming sources is cement industrials. In line to
diminish the effects of cement industrial activities on environment, wastes are used in cement
mortar as a partial replacement of cement weight throughout the present study. These wastes
comprise poultry egg shell which is wealthy in calcium and glass of bottles of juices and soft drink
which has high content of silica. Both types of wastes were grinded carefully and passed sieve No.
200 ( 75μm opening size) to produce egg shell powder (ESP) and milled glass (MG). Cement was
substituted by (5%, 7.5%, and 10% ESP), and (10% MG). These ratios of replacement was
evaluated individually and in groups by compressive strength test at age of 28 days and drying
shrinkage test at ages of 4, 11, 18, 25, and 60 days of drying. Results of tests indicated that
compressive strength and drying shrinkage have the same trend when the replacement ratios of ESP
used individually in mortar mixes. The higher results were recorded with ratios of 5% and 7.5%.
While, compressive strength increased when 10% of MG was used as a partial replacement of
cement, and drying shrinkage decreased at ages 11, 18, and 25 days of drying. The combination of
MG and ESP in one mix, decrease compressive strength in all percent of addition. However the
gathering of MG to 5% of ESP, and MG to 7.5% of ESP decrease drying shrinkage at all age of
testing when compared it with the reference mix.
