RESEARCH ON THE MECHANICAL BEHAVIOR AND FLEXURAL STRENGTH OF PRECAST CONCRETE COLUMNS USING HIGH STRENGTH GROUT-FILLED COUPLING SLEEVES

To study the cyclic behavior of partially precast steel fiber high-strength concrete columns with high-strength steel bars, four full-sized square column specimens were fabricated and tested under constant axial load and horizontal cyclic load. The effects of the strength of precast concrete shell and the diameter of cast-in-place column core were analyzed in detail. The results show that partially precast steel fiber high-strength concrete columns have good seismic performance and deformation ability. Compared to the concrete column with lower strength of precast concrete shell, the concrete column with higher strength of precast concrete shell showed higher bearing capacity and energy dissipation capacity while lower ductility. Moreover, with the increase of the diameter of cast-in-place column core, the bearing capacity and the deformation ability of the specimen decreased. Finally, based on the experimental research and theoretical analysis, a calculation model for predicting the maximum bearing capacity was proposed, and the results obtained from the formulas were in good agreement with those from the experiments.

Download Full-text

Comparative Study of Shear and Flexural Strength for Various Parameters on Hardened High Strength Fibre Reinforced Concrete Beam (HSFRC) for M70 and M80 Grade

SSRN Electronic Journal ◽

10.2139/ssrn.3430048 ◽

2019 ◽

Author(s):

Rakhi Nimbhore ◽

Rahul Pandit ◽

Abhijeet Wadekar

Keyword(s):

Reinforced Concrete ◽

Flexural Strength ◽

Comparative Study ◽

Concrete Beam ◽

High Strength ◽

Reinforced Concrete Beam ◽

Fibre Reinforced Concrete

Download Full-text

Modelling compressive strength, flexural strength and chloride ion permeability of high strength concrete incorporating metakaolin and fly ash

Materials Today Proceedings ◽

10.1016/j.matpr.2021.01.789 ◽

2021 ◽

Author(s):

Tarun Gehlot ◽

Suresh Singh Sankhla ◽

Sangeeta Parihar

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Flexural Strength ◽

High Strength Concrete ◽

Chloride Ion ◽

High Strength ◽

Ion Permeability ◽

Strength Concrete

Download Full-text

Microstructures and Mechanical Behavior of Bulk Nanocrystalline γ–Ni–Fe Produced by a Mechanochemical Method

Journal of Materials Research ◽

10.1557/jmr.2002.0147 ◽

2002 ◽

Vol 17 (5) ◽

pp. 991-1001 ◽

Cited By ~ 9

Author(s):

X. Y. Qin ◽

J. S. Lee ◽

C. S. Lee

Keyword(s):

Yield Strength ◽

Mechanical Behavior ◽

Light Emission ◽

Hot Isostatic Pressing ◽

Microstructural Analysis ◽

High Strength ◽

Compression Tests ◽

Mechanochemical Method ◽

Force Microscopy ◽

Bulk Nanocrystalline

The microstructures and mechanical behavior of bulk nanocrystalline γ–Ni–xFe (n-Ni–Fe) with x = ∼19–21 wt%, synthesized by a mechanochemical method plus hot-isostatic pressing, were investigated using microstructural analysis [x-ray diffraction, energy-dispersive spectroscopy, light emission spectrum, atomic force microscopy (AFM), and optical microscopy (OM)], and mechanical (indentation and compression) tests, respectively. The results indicated that the yield strength (σ0.2) of n-Ni–Fe (d ∼ 33 nm) is about 13 times greater than that of conventional counterpart. The change of yield strength with grain size was basically in agreement with Hall–Petch relation in the size range (33–100 nm) investigated. OM observations demonstrated the existence of two sets of macroscopic bandlike deformation traces mostly orienting at 45–55° to the compression axis, while AFM observations revealed that these bandlike traces consist of ultrafine lines. The cause for high strength and the possible deformation mechanisms were discussed based on the characteristics of microstructures and deformation morphology of n-Ni–Fe.

Download Full-text

Properties of High-Strength Flowable Mortar Reinforced with Palm Fibers

ISRN Civil Engineering ◽

10.5402/2012/718549 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Eethar Thanon Dawood ◽

Mahyuddin Ramli

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Physical And Mechanical Properties ◽

High Strength ◽

Test Results ◽

Palm Fiber ◽

Toughness Index ◽

Strength And Toughness

This study was conducted to determine some physical and mechanical properties of high-strength flowable mortar reinforced with different percentages of palm fiber (0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, and 1.6% as volumetric fractions). The density, compressive strength, flexural strength, and toughness index were tested to determine the mechanical properties of this mortar. Test results illustrate that the inclusion of this fiber reduces the density of mortar. The use of 0.6% of palm fiber increases the compressive strength and flexural strength by about 15.1%, and 16%, respectively; besides, the toughness index (I5) of the high-strength flowable mortar has been significantly enhanced by the use of 1% and more of palm fiber.

Download Full-text