Portland cement as a binder in concrete is the most widely used material in the construction. Performance of concrete made by Portland cement against attacks of chemical agents like acid and sulfate attacks is a matter of concern. Portland cement paste is decomposed in contact with acid. The main cause of this decomposition is the dissolution of C-S-H and Ca(OH) 2 in the cement paste which become unstable H 12.5. In most cases of acid attack on concrete, the attacking acid is a combination of several kinds of acid. For example, concretes affected by acid rain, acid attack on concrete is a mixture of sulfuric acid, nitric acid and hydrochloric acid. One of the most common types of acid attacks, especially in the sewer, attack caused by the oxidation of hydrogen sulfide gas (H 2 S).The concrete industry is one of two largest producers of carbon dioxide, creating up to 5% of worldwide man-made emissions of this gas, of which 50% is from the chemical process and 40% from burning fuel. Cement production process that is associated with high consumption of energy, so that energy consumption per ton of clinker for cement production in 1700 to 1800 mega joules. Also, the amount of energy needed to produce Portland cement is 4.53 MJ/kg, but for blast-furnace slag, as a material to replace cement, it is 0.31 MJ/kg, i.e. more than 14 times; in other words, the energy needed to produce slag is around 7% of the energy needed to produce Portland cement. Theoretically, any substance that has a combination of silicon and aluminum can be alkali activated. Alkali activated concrete reaction of a substance with a solid alumina silicate for the preparation of a solid material. One of the sources of alumina-silicate in our country is slag as a by-product. The alkali activated slag concrete and its performance in acidic environments were investigated as a solution considered by researchers in terms of its structural and performance features. In this dissertation, the feasibility of using steel slag for the production of durable concrete with alkali activated in acidic media was investigated. In order to evaluate the performance of alkali active slag concrete in the acidic environment, compressive strength of alkali activated at ages 7, 14, 28, 90, 120 and 180 days in the sulfuric acid and hydrochloric acid environment and weight loss of samples were measured after leaving the acid. To better understand and chemistry of the process after exposure to acid, XRF and XRD tests on samples after 6 months of exposure in two above-mentioned acidic environment was performed. The study examined, sodium hydroxide or potassium hydroxide Molarity, the amount of alkaline solution (sodium or potassium hydroxide to sodium silicate), alkali solution to slag (weight ratio), alkaline solution (sodium hydroxide or potassium hydroxide). The results showed that, compared with Portland cement concrete Slag active alkaline concrete performance is much better so that minimal loss of compressive strength of alkali activated Slag concrete after exposure to sulfuric acid and hydrochloric acid from 180 days to 14.55 and 4.00 percent respectively, while at the same age for Portland cement concrete 59.82 and 38.24 percent respectively. Weight loss after 6 months immersion Portland cement concrete in sulfuric acid and hydrochloric acid, 9.74 and 3.76 respectively. Key Words: Alkali-activated slag concrete, Durability, Sulphuric acid, Hydrochloric acid, Loss of compressive strength, Weight loss.