The work presented in this paper aims to the improvement of the moderately expansive clayey soil in AL-wahda district at Mosul city, by the addition of crushed limestone obtained from the waste of Masonry Factories presented in the industrial area, of east side of Mosul City.This abandoned wast material creates serious environmental problem in the area surrounding these factories requiring an urgent solution to dispose of the huge limestone belonging to Fat`ha Formation. Different amounts of the crushed limestone by weight (passing sieve No. 40) were added 2, 4, 6, 8 and 10% to the clayey soil from AL-wahda district at Mosul to reduce its expansiveness and to improve its engineering properties for many earth work construction. The results showed reduction in the plasticity of the clay and significant decrease in expansion to about 72%, which gives good results for road constructions.

Classifying soils into groups with similar behaviour, in terms of simple indices provide a general guidance about engineering properties of the soils. Complemetary physical properties of soil mean any three properties of soil that any two of them will be enough to estimate the third one, for examples Atterberg limits (Liquid Limit %, Plastic Limit % and Plasticity Index %) are substantially complementary physical properties due to the equational relationships between these three properties. Also the size fractions of soil that component from three fractions only (Clay %, Silt % and Sand %) are complementary physical properties because the total sum of these properties will be handred percent. In this study only two of the three complementary physical properties of soil have been converted to standardized values by subtracting each properties from the mean value and dividing the result by the standard deviation . The standardized values values are plotted on two dimensional graph which divided into a uniform area up on the unity standard deviation. Number of samples are measured in each area to draw the contours map which shows the individual groups . this a simple statistical treatment for a complementary physical properties of soils has been applied on soil data from Tulool Al-Bacth/Shirqat road. The resuls shows very satisfactory.