الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Self-curing concrete ( SCC ) is a new concrete incorporating self-curing agents which represent a new trend in the concrete construction in the new millennium. The concept of self-curing agents is to reduce the water evaporation from concrete and hence increase the water retention capacity of the concrete which causes continuous cement hydration and consequently the achievement of the concrete strength together with good quality. Eighty three different concrete mixes of self-curing concrete ( SCC ) and its conventional ( CC ) were selected to represent the most local materials can be used and prepared to study the effects of self-curing agent content and type, cement content and type, silica fume ratio, water-cement ratio and coarse aggregate content and type on fresh, mechanical and physical properties of concrete and at the same time their effects on durability properties. All tests results were analyzed with the aid of the ANOVA statistical method. To investigate the effects of self-curing agent content and type, three types were used, chemical type such as poly-ethylene glycol with ratio 1 % , 2 % and 3 % by weight of cementitious materials, saturated light weight aggregate type such as lica with ratio 10 % , 15 % and 20 % by volume of sand and powder type such as fine rubber with ratio 3 % by weight of cementitious materials to compare between them for self-curing under different curing regimes. The results of the present study indicate that, poly-ethylene glycol is one of the main responsible for producing self-curing concrete which exhibited improvement in concrete properties under all curing regimes and resistance to chloride attack compared to conventional concrete .Increasing the poly-ethylene glycol dosage from 2.0 % to 3.0 % did not show beneficial effect in concrete properties. Moreover, there is a critical dosage of poly-ethylene glycol for improvement of concrete properties and chloride attack resistance. This critical dosage depends on cement content, water-binder ratio. In general, this critical dosage near 2.0 %. Another main responsible for producing self-curing concrete is pre-soked light weight aggregate such as lica which exhibited acceptable results in concrete properties under all curing regimes and resistance to chloride attack compared to conventional concrete. The experimental investigation exhibited that the optimum ratio can be used is 15 % by volume of sand. Add to that, using poly-ethylene glycol ( Ch.type) in concrete gives relatively better results compared to saturated leca ( Leca.type ).