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بخشی از متن مقاله Three Equation Method For Concrete Mix Design word :
سال انتشار: 1389
محل انتشار: سومین کنفرانس بین المللی مقاوم سازی لرزه ای
تعداد صفحات: 12
نویسنده(ها):
Hakim S. Abdelgader – Full Professor, Al-fateh University, Tripoli, Libya
Ali S. El-baden – Assistance Professor, Al-fateh University, Tripoli, Libya
چکیده:
A good design for concrete mixes is considered as a milestone for the construction of any concrete member or structure capable of fulfilling economic, serviceability and durability requirements, as well as safety and efficiency throughout its useful life. Mix design is defined as the process for determining the right quantities of concrete’s components, namely; cement, aggregate, sand and water. Currently, there are several international methods locally approved for mix designs, such as: The American Concrete Institute method (ACI) and the British Standard method (BS), which are widely used in Libya at research centers, universities, concrete batch plants as well as pre-cast concrete manufacturing plants (e.g.: pre-stressed concrete beams, concrete columns and slabs, ……etc). These methods depend on certain equations and graphs derived from mathematical analysis of the results obtained from previous experience in this field. Generally speaking, mix design methods give some indications and starting points, and designers need to test and adjust the results obtained by trial mixes to investigate the variables relating to the characteristics and properties of local materials and the effect of surrounding environmental conditions. This paper illustrates: · The steps used for mix design using the Three Equations Method, which is referred to as the Bolomeya method. “This method is used in some research centers in Poland and was recently applied in the laboratories of the Civil Engineering Department in the University of Al-fateh in Libya”. · Results obtained by this method using the local materials subject to local environmental conditions
