Assessment of frictional-bond strength at the interface of single SSF in cementitious composite and prediction of accompanying pressure of surrounding matrix

AbstractThis paper explores the behavior of the interface of glass fiber and cementitious matrix under the effect of aging. Pull-out tests of multiple alkali resistant glass fiber strands embedded in portland cement paste matrix were conducted. Four different curing regimes of 3 and 14 days normal curing, in addition to 3 and 7 days accelerated aging were employed. A recently developed method of characterizing interfacial properties was used to identify and evaluate the important parameters at interface. The experimental data are presented on the parameter of shear stiffness of a fiber-matrix boundary layer, the shear bond strength, the frictional bond strength and the specific surface energy as a function of fiber embedded length. It was observed that aging had a larger effect on the stiffness of the interface, the shear bond strength and the specific surface energy than on the frictional bond.

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Experimental Study of Bond Behavior Between Rebar and PVA-Engineered Cementitious Composite (ECC) Using Pull-Out Tests

Frontiers in Materials ◽

10.3389/fmats.2021.633404 ◽

2021 ◽

Vol 8 ◽

Author(s):

Jie Xiao ◽

Xiang Long ◽

Ming Ye ◽

Haibo Jiang ◽

Lingfei Liu ◽

...

Keyword(s):

Bond Strength ◽

Layer Thickness ◽

Volume Content ◽

Cementitious Composite ◽

Fiber Volume ◽

Cover Layer ◽

Bond Behavior ◽

Engineered Cementitious Composite ◽

Functional Relationships ◽

Pull Out

As a novel civil engineering material, Engineered Cementitious Composite (ECC) has attracted more and more attention due to its strain-hardening characteristics, good post-cracking resistance and its unique properties. Bonding between Engineered Cementitious Composite (ECC) and rebar has a great effect on the mechanical behavior of structural members. In this paper, direct pull-out tests were conducted to understand the bond behavior between the ECC and rebar. The test parameters included rebar diameter and type, cover layer thickness, embedment length and fiber volume content. Bond-slip curves, failure and cracking pattern and bond strength were compared and discussed. The test results indicated that the bond strength decreased with the increase of embedded length. Through regression analysis with the test data, the functional relationships between bond strength and cover layer thickness and rebar diameter were fitted well. According to the positive and negative signs of the fitting parameters m and n, the relationship between the bond strength and the cover layer thickness and the rebar diameter could be determined. The bond strength increased obviously with the increase of fiber content. When the fiber volume content was 1, 1.5 and 2%, the bond strength of these specimens were 1.5, 2.5 and 3.1 times that of specimens without polyvinyl alcohol (PVA) fiber.

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Gun Liner Emplacement

Journal of Pressure Vessel Technology ◽

10.1115/1.4007008 ◽

2012 ◽

Vol 134 (4) ◽

Author(s):

William S. de Rosset

Keyword(s):

Plastic Deformation ◽

Bond Strength ◽

Coefficient Of Friction ◽

Refractory Metal ◽

Elastomeric Material ◽

The Coefficient Of Friction ◽

Frictional Bond ◽

Load Frame ◽

Metal Liner

The development of a process to emplace a refractory metal liner inside a gun tube is described. The process consists of filling the liner with an elastomeric material and then slipping this arrangement into the gun tube. The ends of the liner are plugged with plastic disks and pressure is applied to the elastomeric material by a load frame. Plastic deformation of the gun tube results in residual radial stresses that induce a frictional bond between the liner and gun tube. Efforts are described to increase the bond strength through increasing the coefficient of friction.

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Bond strength of steel bars embedded in high-performance fiber-reinforced cementitious composite before and after exposure to elevated temperatures

Fire Safety Journal ◽

10.1016/j.firesaf.2017.06.006 ◽

2017 ◽

Vol 92 ◽

pp. 98-106 ◽

Cited By ~ 22

Author(s):

Xiuling Li ◽

Yi Bao ◽

Na Xue ◽

Genda Chen

Keyword(s):

Bond Strength ◽

High Performance ◽

Elevated Temperatures ◽

Cementitious Composite ◽

Fiber Reinforced ◽

Steel Bars ◽

Before And After ◽

High Performance Fiber

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Review on Experimental Study on Effect of Corrosion In Reinforced Concrete Fly-Ash Beam

International Journal of Scientific Research in Science and Technology ◽

10.32628/ijsrst207318 ◽

2020 ◽

pp. 92-96

Author(s):

Shubham N. Dadgal ◽

Shrikant Solanke

Keyword(s):

Fly Ash ◽

Bond Strength ◽

Structural Damage ◽

Pullout Test ◽

Partial Replacement ◽

Structural Members ◽

Accelerated Corrosion ◽

Resistivity Method ◽

Electrical Resistivity Method ◽

Structural Failures

In modern days for structures in coastal areas it has been observed that the premature structural failures are occurs due to corrosion of the reinforcements of the designed structural member. The corrosion causes the structural damage which in turn leads to reduction in the bearing capacity of the concerned structural members. The aim of this study was to study the effect of partial replacement of fly ash to minimize the corrosion effect. Beams were designed and corroded by using artificial method known accelerated corrosion method. The beams were then tested for flexural and bond strength. Also the weight loss of the reinforced bars was been determined using electrical resistivity method. The fly ash will replace by 10% and 15%.The strength will calculate at varying percentage of corrosion at 10% and 15%. Beams will cast at M25 grade concrete. The flexural strength will test by using UTM and the bond strength will calculate using pullout test.

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