فهرست مطالب moein khoshroo

The highest part of chemical ions present in the seawater is related to the chloride ion. In this research, the effect of chloride curing condition on the properties of concrete containing zeolite as a mineral admixture and micro-nano bubble water is evaluated. Based on the experiments including X-ray diffraction, compressive strength, water absorption, chloride permeability and electrical resistance, it was determined that the addition of zeolite and micro-nano bubble water to the mixture improved the properties of concrete in the chloride conditions. Also results show that the chloride curing condition causes an improvement in the properties of concrete at the age of 28 days because of the formation of Friedel salt. With increasing age of concrete up to 90 days and decomposition of Friedel salt composition in samples, the process of improvement is reduced. The highest effects on improving the mechanical properties and durability of concrete at the age of 28 days is related to the sample containing 15% zeolite and 100% micro-nano buble water under chloride curing conditions. Improvement contents in the mentioned situation are 47, 78, 254, 84 and 49 percent corresponds to the compressive strength, tensile strength, electrical resistance, chloride permeability and water absorption test respectively.

In this paper, the effect of using natural zeolite as a supplementary cementitious material and micro-nano bubble as a substitute for concrete mixture water has been evaluated on the mechanical properties and durability of concrete. The evaluated parameters for properties of modified concrete include: compressive strength, tensile strength, Bending strength, electrical resistivity and water absorption. The results indicate that the use of zeolite and micro-nano bubble in concrete increases the mechanical properties and the durability of concrete. The greatest improvement is related to the two-phase samples from the combination of 10% zeolite and 100% micro-nano bubble, which compressive strength, tensile strength, bending strength and electrical resistivity increase by 15, 14.88, 5.65 and 194.12% respectively, and water absorption decrease by 25.22%. In general, according to the results, it can be concluded that zeolite and micro-nano bubble, improve the mechanical properties and durability of concrete and their combination has the most positive effect on modified concrete.