Tests of bond resistance between concrete and steel

by Willis Appleford Slater

Publisher: Govt. Print. Off. in Washington

Written in English
Published: Pages: 66 Downloads: 800
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Subjects:

  • Reinforced concrete.

Edition Notes

Other titlesBond resistance of concrete and steel.
Statementby W.A. Slater, Engineer Physicist, Bureau of Standards, F.E. Richart, Structural Engineer, G.G. Schofield, Structural Engineer, Emergency Fleet Corporation. November 1, 1920 ...
Series[United States] Bureau of Standards. Technologic papers,, no. 173
ContributionsRichart, Frank Erwin, 1892- joint author., Scofield, George G., joint author., United States Shipping Board Emergency Fleet Corporation.
Classifications
LC ClassificationsT1 .U4 no. 173
The Physical Object
Pagination66 p. incl. illus., tables, diagrs.
Number of Pages66
ID Numbers
Open LibraryOL6630643M
LC Control Number20026017
OCLC/WorldCa13367194

-R a,d is the design pull-out resistance of the anchorage. Two ways of determining the design pull-out resistance R a,d are discussed in EC7 [2]; the first one refers to the pull-out resistance derived from the results of tests on anchorages and the second one is based on calculations [EN § (2)]. 1. Abraid the surface of the concrete in the test-area with a carbide stone or wire brush to remove any laitance and deposits. This aids in achieving sufficient bond between the steel disk and the overlay surface. 2. Advance a partial core (typically 50mm diameter) through the overlay, and aFile Size: KB.   The corrosion of steel will have a bad impact on the safety of reinforced concrete structure. In severe cases, it may even be disastrous. In order to understand the impact of steel corrosion on the structure, tests are carried out to study corrosion and expansion rules of steel bars as well as the impact rules of corrosion on bond force between steel and : Xian Feng He, Shou Gang Zhao, Yuan Bao Leng. testing grouted reinforcement in the field is evaluated. The bond strength of grouted reinforcing bars is not highly sensitive to differences in the hole preparation or cleaning methods studied. Grouts that provide strong bond at the grout­ concrete interface provide higher bond strengths than grouts that undergo failure at the grout­.

This study presents the experimental results of bond strength between steel reinforcement bar and grouted splice sleeve connector. In this study, the bond strength value between steel reinforcement and grout is first to be determined and then obtain the relationship between bond strength and slip in the grout based on the Size: KB. tigates the effect of the bonding geometry on the shear resistance of steel plates bonded to concrete. The bonding agent used was an epoxy resin. Different bonding widths and lengths were tested for two different types of concrete and for several temperature levels. In addition to the laboratory tests, a FEM model was used, first to. Index Terms—Bond strength, corrosion, experimental tests, finite element analyses, steel-concrete bond. I. INTRODUCTION. This study is part of a long-term research program started in at the Politecnico di Milano and focused on bond of corroded bars in concrete, [1]-[4]. Experimental tests of. connections between steelwork and concrete or masonry structures. The work was prepared by earlier SCI report on connections between steel and other materials that provided important source material for this study. The connections between steel and other materials include:File Size: 2MB.

Simple tests could cover differentiation between carbon and stainless steel, or between and , or between series and series, or ferritic/duplex and austenitic grades. Full laboratory chemical analysis is needed for some cases (such as differentiating between low and standard carbon grades) or when it has become a legal rather than. The performance of reinforced concrete structures depends on adequate bond strength between concrete and reinforcing steel. ACIR Bond and Development of Straight Reinforcing Bars in Tension (Reapproved ) describes bond and development of straight reinforcing bars under tensile load. Bond behavior and the factors affecting bond are discussed, including concrete cover and bar . The process for casting or pouring concrete without interruption from start to finish is known as continuous casting. This avoids the problem of joining new construction concrete with concrete already poured. If such a joint is not properly made, _____ joints, which are planes of weakness result. For reinforced concrete structures, the bond between steel and concrete takes on a key role. In the case of dynamic loading, it The increase of bond resistance was higher for low concrete strength than for high In tests with long bond length steel fracture has been the main failure mechanism [4]. The stress distributionFile Size: KB.

Tests of bond resistance between concrete and steel by Willis Appleford Slater Download PDF EPUB FB2

Tests Of Bond Resistance Between Concrete And Steel [Willis Appleford Slater, Frank Erwin Richart, George G. Scofield] on *FREE* shipping on qualifying offers. This is a reproduction of a book published before This book may have occasional imperfections such as missing or blurred pagesCited by: 5.

Class Book Volume 4-A > f id X T* TXf* 1 4 A. TT•r T. THEORYANDAVAILABLEDATA. ExperimentsbyMarsh,DeJoly,ere haveproventhatthefrictionalresistanceistheprincipal itemof"bond. Tests of bond resistance between concrete and steel / By Willis Appleford Slater, joint author. George G. Scofield, joint author.

Frank Erwin Richart, United States. CONCLUSIONS 20 VII. REFERENCES 21 Helot A STUDY OP BON]) STRESS BETWEEN CONCRETE AND STEEL by Cheng-Yee Wang 1 SYNOPSIS The bond strength between concrete and steel is an im- portant factor from which to determine a sound design for the reinforced concrete.

This problem was introduced as early as by Mr. Thaddeus. concrete and steel material and mechanical properties and load history. The model is implemented within the framework of the finite element method, and a non-local model-ing technique is used to incorporate dependence of the bond response on the stress, strain and damage state of the concrete and steel in the vicinity of the concrete-steel interface.

Abstract. This test method deals with the standard procedures for establishing the relative bond strength of steel reinforcing bars in concrete using beam-end specimens.

This test method shall determine the effects of surface preparation or condition (such as bar coatings) on the bond strength of deformed steel reinforcing bars to concrete. The bond stress between steel and concrete was evaluated by pull out test under the conditions of the bar inserted in the still fresh concrete and when inserted in the hardened concrete with : M.

Doria, A. C Sales, N. de A. Andrade. Present work includes the studying of. the effect of polluted steel bars with the oil on the bonding stress between these bars and. concrete material with taking into account many variables such as embedded length of steel. bar, bar size and degree of pollution.

Test results have shown that the difference of the bond failure pattern between the LWAC and normal weight concrete is significant as the compressive strength of concrete is less than 40 MPa. Tests of Bond Between Concrete and Steel (Classic Reprint) [Duff Andrew Abrams] on *FREE* shipping on qualifying offers.

Excerpt from Tests of Bond Between Concrete and Steel Comparative Values for Bond on Plain Round Bars Effect of Varying Quantity of Cement and Mortar Effect of Anchoring Ends of Bars. About the Publisher Forgotten Books publishes hundreds of. 1 ASTM A, “Standard Test Method for Comparing Bond Strength of Steel Reinforcing Bars to Concrete Using Beam-End Specimens,” and ACI R, “Bond and Development of Straight Reinforcing Bars in Tension,” provide better correlation and comparison of.

The corrosion product, rust, resides at the interface between steel rebar and concrete, thus degrading the bond between steel rebar and concrete. However, rust that is well adhered to the underlying steel helps the bond between steel and concrete (1,2).Cited by: The strengthening of reinforced concrete structures using externally bonded steel or advanced fibre reinforced plastic (FRP) composites is becoming increasingly common.

A key factor affecting the behaviour and reliability of such strengthened structures is the bond strength between the steel or FRP plate and the concrete substrate. The bond properties of reinforcing steel bars embedded in structural concrete made with locally available natural lightweight aggregates, was studied using pull-out tests on Cited by: 2.

The APULOT test philosophy is to perform the reinforced concrete quality control from appropriate steel-concrete bond testing in the construction site, i.e., ascertain the compliance of the concrete compression strength ";in situ"; by means of bond strength through correlation between these respective strengths, proposed by Lorrain et al.

[17]. Cement Standards and Concrete Standards ASTM's cement and concrete standards are instrumental in the evaluation and testing of concrete, cement, and aggregates.

Concrete can have different properties depending upon the mixture that is used in creating it, which contains cement, chemical admixtures, and. Tests of bond between concrete and steel.

Urbana, University of Illinois [] (OCoLC) Material Type: Government publication, State or province government publication: Document Type: Book: All Authors / Contributors: Duff A Abrams.

This video shows a laboratory experiment for a pullout test on a reinforced concrete. The reinforcement is ribbed and embedded to almost the full length of the concrete specimen. Keywords: Concrete Connections, Adhesion, Bond, Friction, Dowel Action, Shear Resistance 1. Introduction The connections between concrete layers with different ages may occur in a wide range of situations, from structures rehabilitation and repairing to the construction of new buildings both with precast or cast-in-situ elements.

The use ofFile Size: KB. Abstract: This paper presents a study about the bond of high strength concrete with high strength steel. Fourteen pull out tests were carried out to determine the bond.

The concrete strength was about 70 MPa and the steel was a MPa grade. Bar diameters used w 16, 20, 25, 28, 32 and 36 mm. The development and maintenance of a sound band is an essential requirement of a concrete patch repair.

Tensile bond tests are increasing in popularity as a means of measuring this adhesive property, both on site for quality control and in the laboratory for materials evaluation. This paper discusses the main issues relevant to tensile bond testing, namely material properties, surface Cited by:   In reinforced concrete, a good bond between the reinforcement and the concrete is required for an optimal interaction of these two materials.

In the present contribution, an attempt is made to lay down the factors influencing the value of the ultimate bond stress τ du in a formula by a theoretical approach. The stress condition in the concrete around the bar is described by means of the model Cited by: 6.

conventional bond characteristics of the steel used as reinforcement in reinforced concrete. Thus, test indicated the two curves that is representing the slip of the bar as a function of the load applied to the beam. The interfacial transition zone (ITZ) at the vicinity of the reinforcing bar affects the bond between steel and concrete.

TESTSOFBONDRESISTANCEBETWEENCONCRETE ANDSTEEL ,t,ld CONTENTS Page uction 6 eandscope 6 ledgment 8 A pull-out bond test with short bond length for estimation of the splitting tendency of different rib shapes for reinforcing bars is proposed and investigated.

In the test the bond force component along the bar is separated from the radial one. The radial component is determined by measuring circumferential strain in.

Title: Testing the Bond between Repair Materials and Concrete Substrate Author(s): A. Abu-Tair, S. Rigden, and E. Burley Publication: Materials Journal Volume: 93 Issue: 6 Appears on pages(s): Keywords: bonding; concretes; cyclic loads; flexural strength; repairs; shear properties.

Date: 11/1/ Abstract: The bond strength of repair materials to the concrete substrate. corroded reinforcements showed a higher percentage of bond strength degradation due to concrete cracking during the pullout tests[6]. An experimental investigation was conducted by Wu, Lv, Zhou and Fang to explore the degradation model of bond stress between concrete and deformed steel bars with four different diameters (12,16,20 and a loss of bond between the steel and the concrete and subsequent delamination and spalling.

If left unchecked, The first defense against corrosion of steel in concrete is quality concrete and sufficient concrete cover over resistance is improved. Bond stress behavior between concrete and steel rebar: Critical investigation of pull-out test via Finite Element Modeling and Analysis Md.

Rashedul Kabir, Md. Mashfiqul Islam International Journal of Civil and Structural Engineering 83 Volume 5 Issue 1 bonding between concrete and reinforcing steel Size: KB.

National testing organizations frequently participate in the many product tests conducted at NGC Testing Services. Fire, acoustical, structural and analytical test laboratories are available commercially through NGC Testing Services SM for other manufacturers and research interests.

For information, call or The American Concrete Institute. Founded in and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design.Read More: Measurement of Air Content in Concrete by Pressure Air Method 3.

Setting Time. The action of changing mixed cement from a fluid state to a solid state is called “Setting of Cement”. Initial Setting Time is defined as the period elapsing between the time when water is added to the cement and the time at which the needle of 1 mm square section fails to pierce the test block to a.