الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
A majority of the durability issues in concrete structures deal with the diffusion of one or several ions into the material. However, due to the complexity of the different mechanisms involved, a single model predicting a universal response cannot be used. The rate of deterioration of concrete structures by external chemical attack depends on the following:
• Concrete quality including porosity and degree of hydration.
• Presence of water in contact with concrete.
• Concentration, chemical identity, and solubility in water of the chemical.
• Environmental effects such as temperature and humidity and their variations.
The interaction between chloride diffusion and micro cracks in the structures affects the durability of these structures. Limited information is available on the influence of these factors on chloride ion penetration into concrete.
There is a great deal of misunderstanding of the terms water and chloride permeability and waterproof. Water permeability is a most commonly thought of when discussing ”high performance concrete”. Waterproof is a term often used when describing the ability of a structure to hold in or hold out water. Both low strength and durability are closely linked to low permeability. However, the problem of creating durable structures fit for their designed purpose requires a broader understanding of what exactly is meant by low permeability concrete and waterproof concrete.
The main objective of this study is comparing effect of different water proofing materials on permeability and chloride penetration and how can these materials decrease the permeability of Concrete.
The rapid chloride permeability test CRCPT), as it is commonly called, has been in existence for over 20 years and was standardized by ASTM over 15 years ago. The test is used extensively in the concrete industry for assessing concrete quality and is now being included in concrete specification documents. The results of the RCPT to the coated concrete specimens by the sealing materials depend on copolymer cement at different ages comparison with the control mix. It was found that the sealing materials depend on polymers DROPped to lower than the control specimen by 23.5 %, and 20.3% after 28, 90 days curing respectively, sealing materials depend on 3 faces active C2S DROPped to lower than the control specimen by 0.03 %, and 24 % after 28, 90 days curing respectively and specimens by the sealing materials depend on 4 faces active C2S DROPped to lower than the control specimen by 0.01 %, and 32.5 % after 28,90 days curing respectively.
The results of the RCPT to the concrete specimens by the sealing mortar materials depend on active C2S at different ages in compared with the control mix DROPped to lower than the control specimen by 0.01 %, and 76.8 % after 28, 90 days curing respectively. when sealing materials depend on mortar 1 cm used and It was found that the sealing materials depend on mortar 2 cm used DROPped to lower than the control specimen by 50.9 %, and 100 % after 28,90 days curing respectively.