DESIGN OF CONCRETE MIXES (NON-AIR ENTRAINING) USING THE LICAL AGGREGATES IN MOSUL CITY

	DESIGN OF CONCRETE MIXES (NON-AIR ENTRAINING) USING THE LICAL AGGREGATES IN MOSUL CITY
AL-TAQANI
Article 1, Volume 24, Issue 2, 2011, Pages 0-0
Abstract
Trial mixes were made to study and define the best mix design method applied to local aggregate (Gravel and sand obtained from the area located between Al-Rasheediah and Al-Danadan place in Mosul city). Test results indicated that : (a) Generally , when the discussing the results with relation to mix proportions and different levels of workability , the Building Research Establishment method (British method) recorded an increase in the workability and compressive strength rather than the American Concrete Institute (ACI) method using the local aggregate located at the assigned region above , the percentages of increasing in these properties are shown in the following table : Workability levels Slump test (%) Compressive Strength (%) (Low) , Slump = (3-5) cm. 28.03 12.07 (Medium) , Slump = (8-10) cm. 14.40 10.48 (High) , Slump = (15-80) cm. 21.40 12.10 Averages 21.27 % 11.55 % (b) It is possible to make another comparison , for a given water/cement ratio , the Building Research Establishment method (British method) gives a workability higher than that obtained by the American Concrete Institute (ACI) method , and for the same water/cement ratio the (ACI) method gives a compressive strength higher than that obtained by the (British method). (c) The Building Research Establishment method (British method) is more practical and applicable than the American Concrete Institute (ACI) method because it takes into account type of cement , type of aggregates as well as other characteristics (especially particle shape).
Keywords
Concrete; non; Entrained Air; mix design; ACI; British

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