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RISEffect of Strain History and Mixture Proportions on Early-Age Cement Paste and Mortar Stress Relaxation
Publisher: ASCE
Abstract: The influence of sand particles, aging, and water–cement (w/c) ratio on the viscoelastic relaxation modulus of cement paste and mortars was measured at early ages (1–28 days). Furthermore, the relaxation modulus ...
Utilization of Silica Fume to Stabilize the Dispersion of Carbon Nanofilaments in Cement Paste
Publisher: American Society of Civil Engineers
Abstract: The incorporation of carbon nanofilaments in cementitious materials has been researched extensively in the past decade. However, the poor dispersibility of these filaments remains a hurdle to harnessing their exceptional ...
Quasi-Static Axial Damping of Poroviscoelastic Cylinders
Publisher: American Society of Civil Engineers
Abstract: Design of infrastructure materials with inherent material damping may help dissipate energy during dynamic loading events such as earthquakes, thereby reducing structural damage and risk of collapse. One possible method ...
Comparison of Permeability of Cementitious Materials Obtained via Poromechanical and Conventional Experiments
Publisher: American Society of Civil Engineers
Poromechanical Damping of Cementitious Materials
Publisher: American Society of Civil Engineers
Abstract: Other than through the creation of fracture surfaces, cementitious materials do not generally contribute significantly to strain energy dissipation or damping during dynamic loading of civil infrastructure. In this paper, ...
Correlation of Radial Flow-Through and Hollow Cylinder Dynamic Pressurization Test for Measuring Permeability
Publisher: American Society of Civil Engineers
Abstract: The results of the dynamic pressurization test and of the radial flow-through test on hollow cylinders of the same material are compared to validate the newly developed hollow dynamic pressurization technique. The results ...
Viscoelastic Poisson’s Ratio of Asphalt Mixtures
Publisher: American Society of Civil Engineers
Abstract: The Poisson’s ratio (PR) of asphalt mixtures is a fundamental material property that is an important input parameter to viscoelastic pavement models. It is typically assumed that PR of asphalt is time independent or, in ...
Regularized Density-Driven Damage Mechanics Model for Failure Analysis of Cementitious Composites
Publisher: American Society of Civil Engineers
Abstract: This paper presents the mathematical derivation and numerical implementation of a novel regularized density-driven damage mechanics (D3M) model for simulating failure in concrete members. The novel idea behind the derivation ...
Accelerated Autogenous Healing of Concrete Pipe Sections with Crack and Decalcification Damage
Publisher: American Society of Civil Engineers
Abstract: Many concrete water-distribution systems are past their service life and need repair due to leaks associated with cracks. Autogenous healing of concrete cracks and leaks can sometimes occur if the chemistry of distributed ...
Mechanical Properties of Nanocomposite Cement Incorporating Surface-Treated and Untreated Carbon Nanotubes and Carbon Nanofibers
Publisher: American Society of Civil Engineers
Abstract: To study the effects of functionalized carbon nanotubes (CNTs) and carbon nanofibers (CNFs) on the mechanical properties of cement composites, both untreated and treated CNFs and CNTs were added to cement paste in ...