سلوك أنواع مختلفة من اسمنت المحلي و المستورد كمادة إنهاء

الملخص EN

That is absolutely necessary and the need for and use of cement in the end it became necessary to conduct laboratory tests for this article to find out its mandate despite the fact that there is control of the quality of materials produced for this article in the labs.

So I saw of national duty and humanitarian study of the properties of some types of cement and give guidance for users to choose the best quality by conducting laboratory tests to this article, so I took four samples of cement, two local (bridge and north) and the other imported from (the UAE and the Gulf) has been conducting chemical analysis and physicist, as shown in the table (1) and (2).

The research has included conducting several tests of cement mortar to select four different types of cemnt for three mixing ratio as shown in Table (3), namely, (1:1.5), (1:2), (1:3) and water to cement ratio w / c = 40 % were examined operator of the mortar soft (flow and stiffness) and density of wetlands and absorption of age (3) days and the dry density of age (1) days compressive strength and tensile at old (7,28) days which tests in three treatments (with air, water and oven) has been screening in the laboratory of concrete / at technical institute Musayib, Results show that (flow = 700 mm) and stiffness primary device Viket (12) minutes and hardening the final (27) min and this is identical to the specifications Iraq's number (5) for the years (1984), corresponding to the specification of the (BS-146-1973) and (ASTM-C595-1985) and the compressive strength of age (28) days with water treatment was better to have reached (28.31 Mpa) and tensile strength of age (28) days with water treatment eqal (5 Mpa acoording to Iraq number (5) for the year 1984.

So investors and users are advised to make sure of the type and quality of cement used in order to get high workability, high strength and high durability.