QAQC in Construction

Effects of Silica Fume on the Strength and Durability Properties of Concrete This article presents the effects of silica fume on compressive strength, splitting tensile strength, resistance against chloride penetration and water absorption of concrete. Results indicated that the use of silica fume in concrete increased the compressive strength of concrete. Increase in water-binder ratio reduced the compressive strength of concrete irrespective of the use of silica fume. Silica fume had no noticeable effect on the splitting tensile strength of concrete. The resistance against chloride ion penetration increased with the increase in the contents of silica fume in concrete. A reduction in water-binder ratio (from 0.35 to 0.30) increased the ability of the concrete to resist chloride ion’s penetration. The introduction of silica fume in concrete reduced the water absorption capacity of concrete. A change in water-binder ratio also dramatically reduced the water absorption of concrete.

Interview for RE and Civil Engineer by MOT (Saudi Arabia) Q: 01 What are the duties or responsibilities of Civil Engineer? (asked every times) Ans: Actually Civil Engineer has to assist the R.E in all respects, including site supervision and office works. He has to check the quality of work as per contractual agreements of the contract, specification & according to Client / MOT circulars. To make draft regarding the site problems & forward to R E. To make valuable coordination b/w the contractor & consultants. He has to organize the duties of site staff. To monitor the program according to contract schedule & inform to section Resident Engineer. To make coordination b/w concerned department regarding the removal of obstacles. To maintain the daily & weekly report, regarding site activities & forward to Section Resident Engineer. To write site instructions note & forward to section Resident Engineer for action. He has to keep records of a