Nowadays concrete plays a major role in the construction of various structures. Considering high rate of concrete consumption and increasing need for cement production , It is necessary to pay attention to the environmental degradation effects of this substance.vulnerability of concrete which is made of portland cement, against aggressive environmental factors like acids, sulfates, gases, chlors, seawater, freeze and thaw cycles can be problematic in some cases and it can cause demolition of concrete. Although concretes with high compressive strength, they typically show greater resistance to physical and chemical attacks but other factors such as permeability and density of inner structure of concrete and layout of internal pores in concrete can have a special effect in the durability of concrete. Hence alkali-activated materials were developed with the purpose of eliminating these mentioned flaws in cement concrete and for the production of alkali-activated slag concrete. In the present research was attempted, with available material in the country, one-part alkali-activated slag concrete which in term of production is such as Cement concrete, produced and be studied. Purpose of this study was to investigate the effect of micro silica and polypropylene fibers on the performance of one-part alkali-activated slag concrete in aggressive environment and investigation of permeability of this type of concrete. One-part alkali-activated slag concrete is made from mixture of solid activator sodium metasilicate pentahydrate, cement, aggregate, and water.due to the aim of this study which it was investigation of effect of micro silica and polypropylene fibers,all mixes have a constant mixing design and only variable parameters in mixing designs are different amounts of consumable micro silica and polypropylene fibers. In order to evaluate the performance of one-part alkali-activated slag concrete in acidic and sulfates environments changes in compressive strength, mass and sample size in the ages 90, 120, 210 days in soluble environment of 5% magnesium sulfate and sulfuric acid solution with pH=1 is measured to check the permeability one-part alkali-activated slag concrete , water impermeability test at age of 28 days , carbonation test under 4% and 28% concentration of Co2 and rapid chloride penetration test (RCPT) at the age of 90 days was carried out.For the better Understanding of processes performed on one-part alkali-activated slag concrete in acidic and sulfate environments imaging was performed with scanning electron microscope (SEM). the results of experiments showed using polypropylene fibers with 0.1 to 0.3 percent of concrete volume has a decent effect on the performance of one-part alkali-activated slag concrete in acidic and sulfate environments. while using micro silica with 5, 10 15 weight percent as a binder replacement reduce the durability of concrete in magnesium sulfate environments also according to the result of permeability tests use of micro-silica has a positive effect on the permeability of one-part alkali-activated-activated slag concrete and reduces the penetration of water, Co2 gas, and chloride ion Keyword: one-part alkali-activated slag concrete, sodium metasilicate pentahydrate, micro silica, polypropylene fibers, sulfuric acid environment, magnesium sulfate environment, permeability