Effect of Dry-Wet Cycles on Diffusion Properties of Chloride Ions in Unsaturated Lithium Slag Concrete
Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 1
Abstract
The deterioration of concrete durability was caused by chloride ion erosion under the action of dry and wet circulation. The dry and wet circulation was simulated by immersion and spray under different relative humidity conditions. By measuring the free chloride ion content and the total chloride ion content in different depths of the intrusive concrete specimens, based on the Hill model in the growth curve function, the effects of lithium slag content, environmental relative humidity and erosive chloride mass fraction on the chloride ion diffusion properties of concrete under dry and wet cycles were investigated. The result indicates that under the dry-wet cycle, the time required for the total content of chloride ions in the interior of the concrete to reach the threshold is gradually prolonged as the relative humidity of the environment decreases and the mass fraction of the etched sodium chloride solution increases. When the lithium slag replaces the cement by 20% and the Hill coefficient n is the smallest, the total time required for the total chloride ion content in the intrusive concrete to reach the threshold is the longest. When the internal sampling depth of lithium slag concrete is 1 mm to 5 mm, the order of free chloride ion content is ( RH = 40% condition) > ( RH = 80% condition) > ( RH = 60%condition) > ( RH = 100% condition) . The total chloride ion content inside the concrete under the dry and wet cycle does not increase monotonously with the decreasing of relative humidity.
Authors and Affiliations
Jing TAN, Chuanjian TANG, Hao CHEN, Yong WEN
Keywords
Related Articles
- EP ID EP427035
- DOI 10.15926/j.cnki.issn1672-6871.2019.01.013
- Views 85
- Downloads 0
Design of Magnetic Field Probe for Antenna Near-field Test
A magnetic field probe was designed for the antenna near-field test in the form of coplanar waveguide. An electromagnetic simulation model was established to calculate S21 and S11 parameters of the probe,and the probe ha...
Effect of Void Fraction on Viscosity of Lubricating Oil
Turbine oil and Nitrogen gas were mixed to produce a gas-oil two-phase flow to study the effect on viscosity of the lubricating oil of the variation of the gas void fraction under different ventilation flow. The gas void...
Vehicle Load Extreme Value Prediction and Load Effect Based on POT Model
In order to study the influence of the development and variation of vehicle load on bridge structure,according to the measured data of 176 918 six axles vehicles on Yuzhan expressway by using weigh-in-motion( WIM) system...
Experiment on Developing Technology with Plastic Tube Cast-in-place Concrete Pile in Construction
Plastic tube cast-in-place concrete pile( TC pile) had obvious reaming effect and pre-bearing capacity shortage in the construction. In view of this issue,developing new technology test for TC pile was carried out. This...
Interface Layer Structure and Properties of Cu / Al Compound Plate
The Cu / Al composite plate was prepared by twin-roll casting. Peel testing and tensile testing were used to test mechanical properties of Cu / Al composite. The scanning electron microscope( SEM),energy dispersive spect...