Sustainable and Greener Self-Compacting Concrete incorporating Industrial By-Products: A Review

Impact response of two-layered grouted aggregate fibrous concrete composite under falling mass impact

Inhomogeneous mechanical behaviour of concrete subjected to monotonic and cyclic loading

Crumb rubber has been used since sometime to improve the impact and toughness of normally brittle concrete. As the failure due to fatigue and impact loadings is a problem in normal concrete; the flexibility of the rubber aggregates could be the key to solve it. Even though there is a marginal reduction in the mechanical properties of crumb rubber concrete, this can be overcome by appropriate treatment of the crumb rubber aggregates. Methods, such as mechanical, chemical, thermal and microwave treatment could be used to treat crumb rubber aggregates to enhance their adhesion with the cement mortar. This is desirable since a significant positive impact on the environment could be achieved by utilizing crumb rubber from scrap tires in concrete resulting in the solution of their disposal problems and conserving the depleting sources of natural aggregates. Even though some literature on the properties of crumb rubber concrete is available, there is a need to evaluate methods to overcome the deficiencies of crumb rubber concrete. This paper is a state-of-the-art review on the mechanical, durability, thermal, and acoustic properties of concrete incorporating untreated- and treated-crumb rubber. The beneficial treatment methods have been categorized. It is hoped that this review will encourage the use of crumb rubber concrete in the construction of infrastructure and form a basis for further research on this material. The use of crumb rubber concrete will lead to a sustainable utilization of a waste material, leading to environmental protection and conservation of depleting sources of natural aggregates.

Properties of concrete with untreated and treated crumb rubber – A review

Experimental investigation of concrete fracture behavior with different loading rates based on acoustic emission

Experimental study on fatigue properties of normal and rubberized self-compacting concrete under bending

Experimental study and analytical modeling on hysteresis behavior of plain concrete in uniaxial cyclic tension

Influence of high temperature on post-peak cyclic response of fly ash concrete under direct tension

The utility model discloses a curved test device that draws of developments based on hopkinson pressure bar technique, characterized by from left to right sets gradually power device, trip rod, foil gage, incident bar and test piece on the platform, power device and the trip rod with the incident bar separation, the foil gage is connected with strain acquisition instrument, strain acquisition instrument and oscilloscope are connected, the foil gage sets up the middle part of incident bar, incident bar strike the end tip include with the incline of test piece line contact and with upward side, downside that the incline is adjacent, left surface and right flank, the incline is located the incident bar assaults the positive centre of end tip The utility model provides a can simplify the experimental procedure, reduce the contact end error among the traditional test, get rid of the ripples reshaper to and reduce the curved test device that draws of developments based on hopkinson pressure bar technique of signal of telecommunication error

Curved test device that draws of developments based on hopkinson pressure bar technique

The invention discloses a concrete dynamic direct tensile test device based on a drop hammer test. The concrete dynamic direct tensile test device comprises a casting die, a test piece cast by the casting die, and a fixing device for testing tensile mechanical properties, wherein the test piece comprises a first cylinder and a second cylinder which are arranged sequentially from top to bottom, and is provided with a blind hole along an axial direction, and the diameter of the blind hole is smaller than that of the second cylinder; an impact stick for applying an impact load to the blind hole is arranged on the fixing device; and a disc is arranged at the bottom of the impact stick. Compared with a common cylinder test piece and a beam-shaped test piece, the test piece adopted by the concrete dynamic direct tensile test device disclosed by the invention is simple in structure and has smaller mass, and a rubber gasket or a rubber disc placed in a contact area between the fixing device and the test piece is beneficial for reducing the internal force action and the influence of an inertia effect on impact load reading; and compared with a conventional measuring method, the concrete dynamic direct tensile test device disclosed by the invention can directly measure the dynamic direct tensile mechanical property of concrete under an intermediate strain rate condition, is high in data accuracy, small in error and strong in operability, and has broad application prospects.

Yebo Huang

Papers

Experimental study on fatigue properties of normal and rubberized self-compacting concrete under bending

Experimental study and analytical modeling on hysteresis behavior of plain concrete in uniaxial cyclic tension

Influence of high temperature on post-peak cyclic response of fly ash concrete under direct tension

Curved test device that draws of developments based on hopkinson pressure bar technique

Concrete dynamic direct tensile test device and method based on drop hammer test