C – 99 Standard Test Method for Bond Strength of Epoxy-Resin Systems Used With Concrete By Slant Shear, Bond strength-concrete, Compression. The slant shear test method, ASTM C, is widely employed test procedure to determine the bond strength of repair materials for selection of repair material for . 1 Nov This standard is issued under the fixed designation C /C M; 1 This test method is under the jurisdiction of ASTM Committee C09 on.
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In these tests the compressive astm c882 of repair materials gained rapidly up to 28 days. In cases where astm c882 failure of the composite cylinder was not on the slant surface, a composite compressive strength was determined.
The proportions of the materials used in preparing the substrate mortar were based on a cement-to-sand mass ratio of 1: The testing machine shall be as described. Effect of Differences in Compressive Strength Table 1 shows the compressive strength of substrate and repair materials, astm c882 the bond strength of the repair materials.
Pattnaik the expected behavior include significant differences between the compressive strength, tensile strength, modulus of elasticity and poisson’s ratio of the repair and the substrate materials.
The cubes of the repair materials were tested in compression at 28 days. This abstract astm c882 a brief summary of the referenced standard. Use Determination of c882 bond strength of epoxy-resin-base bonding systems with Portland cement concrete.
However, performance of repair materials has astm c882 that this test method does not adequately characterize the true bond strength of the repair materials due to some inherent shortcomings.
Results Produced Bond strength, bond area, voids in the bond and type and position of the failure are reported. astm c882
Full text of “1. Civil IJCSEIERD INVESTIGATION ON ASTM C Rashmi R Pattnaik”
Laboratory conditions, materials, asmt, and procedures for mixing the Portland-cement mortar shall be tested to meet the requirements specified. Also, Tables 1, indicate the failure type observed in the composite cylinders.
Astm c882, it is observed that for a good bond strength between astm c882 material and substrate mortar the failure occurred in the substrate mortar or on the repair material rather than at the interface.
When the compressive strength ratio between repair material and substrate mortar is approximately 1. However, if the failure surface is not on the ast, the bond strength as per the ASTM C calculation represents minimum bond strength. The bond strength calculated based on this test procedure assumes the failure of the composite cylinder occurs preferentially on the slant surface. The composite cylinders were de-molded 24 hours after casting, and kept for moist curing. Effect of Differences in Compressive Strength Astm c882 order to investigate the influence of differences in compressive strength of the repair and substrate materials on the bond strength of the repair astm c882, composite cylinder specimens were prepared as per the ASTM C test method.
In contrast, test specimens of repair materials cast alongside the composite cylinders exhibited a rapid gain in compressive strength, ranging from 31 MPa to 82 MPa 4, to astm c882, psi.
Astm c882 values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Slant shear test method as per ASTM C standard is widely used to measure the bond strength of the repair materials. However, previous research studies have shown that, the failure on the slant plane is not astm c882 the case with all the repair materials Austin et al.
Work Item s – proposed revisions of this standard. As a result of the disparity in the rate of strength gain between the repair materials astm c882 substrate mortar, the bond strength astm c882 a given repair material determined at any particular age reflected the influence of a unique combination of properties of the repair and the substrate materials.
The substrate mortar specimens cast 35 days earlier astm c882 repair materials, did not exhibit significant changes in their compressive strengths when tested alongside the repair materials. Ideally, the selection of an asfm repair material is a function of the type of structure, existing stress conditions at the location of the repair, environmental exposure conditions, and the time constraints astm c882 on the repair operations.
Evaluation of test methods for measuring the bond strength of portland cement based repair material to concrete, Cement, Concrete and Aggregate 1 1 pp. Time qstm Results Please contact a CTLGroup chemical services representative or Project Manager to discuss astm c882 individual project zstm astm c882 testing response times.
ASTM C Bond Strength of Epoxy-Resin Systems | CTLGroup
This paper investigates the influence of compressive strength of repair materials and substrate mortar on the failure pattern of the composite cylinders and observed that compressive strength of repair materials influence the failure pattern and bond strength of repair materials.
Astm c882 on the astm c882 c82 testing of the composite cylinder for bond strength, the compressive strength of the repair materials were lower, similar or greater than the astm c882 of the substrate mortar.
In case of composite cylinders that failed in substrate the compressive strength of repair materials are 1. ASTM C test procedure does not adequately characterize the true bond strength of the repair astm c882.
A modified slant shear test designed to enforce adhesive failure, Construction and Building Materials 41, pp 7. Link to Active This link will always route to the current Active version of the standard. After suitable curing of the bonding agent, the test is performed by determining the compressive strength of the composite cylinder.
In astm c882 paper an experiment was conducted to investigate the influence of compressive strength of substrate mortar on the bond strength of the repair materials using ASTM C test procedure. This method evaluates bonding hardened mortar specimens to freshly mixed specimens. In the ASTM C specification, the bond strength between the repair astm c882 and substrate concrete is determined using the slant shear test method as specified in ASTM C test procedure. In astm c882 composite cylinder in which the repair astm c882 is bonded to substrate mortar on a slant surface, the applied compressive astm c882 exerts a complex state of stress on the slant surface which is dominated by shear stresses.
Search the history of over billion web pages on the Internet. If the bond between the repair material and the substrate material is good to sustain the shear stresses generated on the slant surface, then the failure mode in the composite cylinder is dictated by the tensile strength corresponding to the compressive strength of the repair astm c882. Compressive Strength The compressive strength of the repair materials and astm c882 mortar were determined using 50 mm astm c882 cube as per the ASTM C standard practice, since the repair materials are primarily mortars.
However, it was observed through experimental studies that the failure on the slant surface is not necessarily the case with all the repair materials.
Order Form 2 Email complete form to contact listed below. The possible reasons for this deviation from www. Figures 2 b and c show the failure of the astm c882 cylinder in astm c882 and repair material, atsm, indicating a weaker material strength than the bond strength at the interface.
Combining values from the two systems may result in non-conformance with the standard. It assumes that the failure of the composite cylinder occurs preferentially on slant surface to calculate the bond strength.
In conducting the bond tests on the repair materials, three different modes of failures were observed as shown in Figure 2.