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RISEffect of Dolomite Filler on the Sulfuric Acid Resistance of Alkali-Activated Slag Binders
Publisher: ASCE
Abstract: In this work, the influence of a dolomite filler, in combination with pulverized fly ash, on the sulfuric acid (H2SO4) resistance of alkali-activated slag (AAS) is studied. The evolution of compressive strength and mass ...
Prediction of Effective Chloride Diffusivity of Cement Paste and Mortar from Microstructural Features
Publisher: ASCE
Abstract: In this paper, a two-step model is proposed to predict the effective chloride diffusivity of cement paste and cement mortar. The prediction effective chloride diffusivity results of cement paste and cement mortar are ...
Influence of Cyclic Drying–Wetting and Carbonation on Oxygen Diffusivity of Cementitious Materials: Interpretation from the Perspective of Microstructure
Publisher: ASCE
Abstract: The oxygen diffusion coefficient of coastal concrete structures under cyclic drying–wetting and carbonation is one of the most crucial factors in its durability performance. In this work, the oxygen diffusion coefficients ...
Influences of Corrosion Degree and Uniformity on Bond Strength and Cracking Pattern of Cement Mortar and PVA-ECC
Publisher: American Society of Civil Engineers
Abstract: Engineered cementitious composites (ECCs), which have a strain-hardening behavior under tension, is widely used for repairing and retrofitting reinforced concrete structures. In such applications, the performance of the ...
Effect of Stress on the Critical Chloride Content of Steel Bar in Simulated Concrete Pore Solution
Publisher: ASCE
Abstract: This work reveals influence of the stress state of steel bars on the critical chloride content for depassivation in a simulated concrete pore solution (SCPS). The passivation behavior of steel in chloride-free SCPS and ...
Experiment and Modeling of the Effect of Aggregate Shape on the Chloride Diffusivity of Concrete
Publisher: American Society of Civil Engineers
Abstract: The purpose of this paper is to evaluate the effect of aggregate shape on the chloride diffusivity of concrete through laboratory experiments and theoretical analysis. In the experiment, three types of crystal glass spheroids ...
Chloride Penetration in Reinforced Concrete Beams under Combined Sustained Loading and Drying–Wetting Cycles
Publisher: ASCE
Abstract: In this paper, the spatial and time-variant chloride distribution in RC beams subjected to combined sustained flexural loads and cyclic drying–wetting action is studied. By means of the digital image correlation (DIC) ...
Evaluation of Nonuniform Corrosion of Steel in Concrete Based on Two-Yoke Magnetic Sensor
Publisher: ASCE
Abstract: The present study aims to develop a two-yoke magnetic sensor system, measuring the mass loss of steel in concrete subjected to nonuniform corrosion. The impressed current method was employed to induce the nonuniform corrosion ...
Investigations on Water Vapor Adsorption–Desorption of Cementitious Materials and Its Induced Permeability under Isothermal Steady-State Flow
Publisher: ASCE
Abstract: H2O(g) adsorption-desorption of cementitious materials and their permeability is a vital indicator for their durability designs, which significantly affects the occurrences of corrosion, carbonization and freeze–thawing, ...
Correlating the Chloride Diffusion Coefficient and Pore Structure of Cement-Based Materials Using Modified Noncontact Electrical Resistivity Measurement
Publisher: American Society of Civil Engineers
Abstract: The electrical resistivity of hardened cement-based materials was measured in this work by a modified noncontact electrical resistivity measurement (MN-CM). The resistivity was further processed to compute the chloride ...