AN INVESTIGATION INTO QUALITY OF AGGREGATE IN ROAD CONSTRUCTION
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- NGN 3000
ABSTRACT
The current extensive use of low quality aggregate in Nigerian road for engineering applications is of concern because they appear to be a level of ignorance surrounding their existing properties and implications. This project was conceived for the purpose of comparing the crushed aggregate and one sample each was obtained from different locations and transported to ministry of works laboratory Enugu, Enugu State. These aggregate samples were tested. It also revealed that the standard strength for Abrasion is between 20 – 30 percent comparison were made between the results, precautions, procedures and observations. And this coarse aggregate should be tested and analyzed before using in any constructional purposes to ensure durability of engineering products. The highest and lowest compressive strength was obtained in the concrete specimens prepared with steel slag and calcareous limestone aggregates, respectively. Similarly, the split tensile strength of steel slag aggregate concrete was the highest, followed by that of dolomitic and quartzitic limestone aggregate concretes. The lowest split tensile strength was noted in the calcareous limestone aggregate concrete. The type of coarse aggregate also influences the modulus of elasticity of concrete. Weaker aggregates tend to produce a more ductile concrete than stronger aggregates do.
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