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RISShrinkage Characteristics of Alkali-Activated High-Volume Fly-Ash Pastes Incorporating Silica Fume
Publisher: ASCE
Abstract: The alkali-activation of high-volume fly ash (HVFA) produces a low-carbon sustainable cementitious binder with remarkable strength and chemical durability at room temperature. In this work, the influence of activator type ...
Influence of Nitrate Corrosion Inhibitors on Phase Stability of Alkali-Activated Slag against Chloride Binding and Natural Carbonation
Publisher: American Society of Civil Engineers
Abstract: Nitrate and nitrite-based corrosion inhibitors have been studied for decades for mitigating corrosion of steel embedded in ordinary portland cement (OPC) concrete; however, few studies are available regarding the effect ...
Effect 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 ...
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 ...
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) ...
Experimental and Numerical Investigations on the Rate-Limiting Step for Macrocell Corrosion of Reinforcing Steel in Concrete
Publisher: ASCE
Abstract: Macrocell corrosion is a frequent and detrimental problem plaguing reinforced concrete structures exposed to chloride environments. This paper investigates the rate-limiting step(s) of macrocell corrosion of reinforcing ...
Effects of Activator Types on Degradation Mechanisms of Metakaolin Geopolymer Mortars Exposed to High Temperature
Publisher: ASCE
Abstract: In this study, we investigated the degradation process of metakaolin-based geopolymers exposed to high temperatures up to 1,000°C. The changes in mechanical properties, microstructure, and phase assemblage of the samples ...
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 ...
Bond Behavior of Deformed Bars in Self-Compacting Lightweight Aggregate Concrete Subjected to Lateral Tensions
Publisher: American Society of Civil Engineers
Abstract: The bond performance of reinforcing bars to concrete, an indispensable factor in designing reinforced concrete structures, is deeply influenced by the stress states of surrounding concrete. In recent decades, although ...