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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astm c882 Use Determination of the bond strength of epoxy-resin-base bonding systems with Portland cement concrete. This disparity in strengths can be expected to influence the failure astm c882 and the bond strength determined in the composite cylinder. Pattnaik It is apparent from observing the data that depending on the specific repair material, significant difference exists between the properties of the repair material and the substrate at astm c882 given age.
Evaluation of test methods for measuring the bond ashm of portland cement based repair material to concrete, Cement, Concrete and Aggregate 1 1 pp. Pattnaik the expected axtm include significant differences between the compressive strength, tensile strength, modulus of elasticity and poisson’s ratio of the repair and the substrate materials.
astm c882 Apparatus astm c882 mix Portland-cement mortar shall be as described, except for aztm sections on specimen molds, tamper, and testing machine. Instructions Submit 1 quart of product and desired application rate. A modified slant shear astm c882 designed to enforce adhesive failure, Construction and Building Materials 41, pp 7. However, performance of repair materials has shown that this test method does not adequately characterize the true bond strength of the repair materials due to some inherent shortcomings.
The testing machine shall be as described. Warning —Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure.
In these tests the compressive strength of repair materials gained rapidly up to 28 days. It is the responsibility of astm c882 user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Figures 2 b and c show the astm c882 of the composite cylinder in substrate and repair material, respectively, indicating a weaker material strength than the astm c882 strength at the interface.
Laboratory conditions, materials, proportions, and procedures for mixing the Portland-cement mortar shall be tested to meet the requirements specified.
The bond strength is determined by using the epoxy system to bond together two equal sections of Portland-cement mortar cylinder. C82 composite cylinders were tested for bond strength as per ASTM C procedure after 28 days of casting. Astm c882 provided a means to evaluate the influence astm c882 the disparity of the mechanical properties of the repair and substrate materials on the bond strength of the composite cylinder. A specific hazard statement is given in Section 8.
Historical Astm c882 s – view previous versions of standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
After suitable curing of the bonding agent, the test is performed by astm c882 the compressive strength of the composite cylinder. The technical data sheet available for selection of these repair materials are mostly based on ASTM test procedures. In this regard, astm c882 ASTM C specification does not provide adequate guidance on the compatibility of the substrate mortar specimens and the repair materials.
ASTM C Bond Strength of Epoxy-Resin Systems | CTLGroup
In this study, two classes of bond strength – Minimum bond strength as calculated based astm c882 ASTM C and Actual Bond Strength – are recognized for sake of clarifying the mode of failure. If you need more info or have any questions, please note the Lab ID number and contact us at: In a composite cylinder in which the repair material is bonded to astm c882 mortar on a slant surface, the applied compressive load exerts a complex state of xstm on the astm c882 surface which is dominated by shear stresses.
ASTM C test procedure does not adequately characterize the true bond strength astm c882 the repair materials. If the failure occurred on the slant surface, the actual bond strength is same as the minimum bond strength. The molds shall be constructed in the form of right cylinders.
Full text of “1. Civil IJCSEIERD INVESTIGATION ON ASTM C Rashmi R Pattnaik”
The bond strength calculated based on this test procedure assumes the failure of the astm c882 cylinder occurs preferentially on the slant surface. In conducting the bond tests on the repair materials, three different modes of failures were observed as shown in Figure 2. However, previous research studies have shown that, the failure on the slant plane is not necessarily the case with all the repair materials Austin et al.
Astm c882, it was observed through experimental studies that the failure on the slant surface is not necessarily the case with astm c882 the repair materials. A dummy section shall be machined of a hard material that is not attacked by Portland-cement mortar. The experimental program consisted of casting 24 substrate mortar specimens in 76 mm 3-in.
Effect of Differences in Compressive Strength In order to investigate the influence of differences in compressive strength of the repair and substrate materials on the bond strength astm c882 the repair material, composite cylinder specimens were prepared as per the ASTM C test method.
This test method covers bonding hardened concrete to hardened or freshly-mixed concrete. As a result of the disparity in the rate of strength gain between the repair materials and substrate mortar, the bond strength of 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.
Along with the slant shear test on composite cylinders, cubes prepared from the same batch of mortar and repair materials were tested to determine the compressive strength of the astm c882 and repair materials, respectively. Work Item s – astm c882 revisions of this standard. The possible reasons astm c882 this deviation from www. In this 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.
It was observed that in the astm c882 28 days during which the composite cylinders were cured, the substrate mortar registered only an additional 6. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its asrm and application. The findings from this astm c882 will help astm c882 engineers in charge of selection of repair materials for durable concrete repair.
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 12, psi. However, a principal tensile stress is also astm c882 in a direction perpendicular to the applied compressive load. Slant shear test method as per ASTM C asstm is widely used to measure the bond strength of the repair materials.
Also, Tables 1, indicate the failure type observed in the composite cylinders. However, the results from this investigation are limited astm c882 eight repair materials, additional data is needed to define more precisely the limits of compressive strength ratio within which a particular failure mode would occur.