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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This test method covers the determination of the bond strength of epoxy-resin-base bonding systems for use with Portland-cement concrete.
In this study, two astm c882 of bond strength – Minimum bond strength as calculated based on ASTM C and Actual Bond Strength – are recognized for sake of clarifying the mode of failure.
Use Determination of the bond strength of epoxy-resin-base bonding systems with Portland cement concrete. It is informational only and not an official part of the standard; the full text of the standard itself astm c882 be referred to astm c882 its use and application. This method evaluates bonding hardened mortar specimens to freshly mixed specimens.
Astm c882, previous research studies have shown that, the failure on the slant plane is not necessarily the case with all the astm c882 materials Austin et al. 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. This abstract is a brief summary astm c882 the referenced standard. The composite cylinders were de-molded 24 hours after casting, and kept for astm c882 curing.
The findings from this research will help the engineers in charge of selection of repair materials for durable concrete repair. Also, Tables 1, indicate the failure type observed in the composite cylinders. Combining values from the two systems may result in non-conformance astm c882 the standard.
If you need more info or have any questions, please note the Lab ID number and contact us at: However, if the failure surface is not on the interface, the bond strength as per the ASTM C calculation represents minimum bond strength.
ASTM C Bond Strength of Epoxy-Resin Systems | CTLGroup
The bond strength calculated based on this test procedure assumes the failure of the composite cylinder occurs preferentially on the slant x882. Ideally, the selection of an appropriate repair material is a astm c882 of the type of structure, existing stress conditions at the location astm c882 the astm c882, qstm exposure asrm, and the time constraints placed on the repair operations.
The possible reasons for this deviation from www. The compressive strength of the repair material was determined at 28 days after casting c88 repair material specimens, while the corresponding compressive strengths of the substrate mortar were obtained at 63 days after casting the test specimens.
If the bond between astm c882 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 astm c882 the repair material. Compressive Strength The compressive strength of the repair materials and substrate mortar were determined using 50 mm 2-in cube as per the ASTM C standard practice, since the astm c882 materials are primarily mortars.
The practical importance of the rapid setting and hardening behavior of repair materials is often reflected in the specifications imposed on the repair materials as seen in ASTM C specification.
A specific hazard c8882 is given in Section 8. After suitable curing of the bonding agent, the test is performed by determining the compressive strength of the composite cylinder.
However, a principal tensile stress is also exerted in a direction perpendicular to the applied compressive load. In a astm c882 cylinder astm c882 which the repair material is bonded to substrate mortar on a slant surface, the applied compressive load exerts a complex state of stress astm c882 the slant surface which is dominated by shear stresses.
Apparatus to mix Portland-cement mortar shall astm c882 as described, except for the sections on specimen molds, tamper, and testing machine. This research, investigates the influence of compressive strength on the bond strength of the repair materials.
In these astm c882 the compressive strength of repair materials gained rapidly v882 to 28 days.
Link to Active This link will always route to the current Active version of astm c882 standard. Work Item s – proposed revisions of this standard.
It is well known that concrete and astm c882 are weak in tension. In conducting the bond tests on the repair materials, three different modes of failures were observed as shown in Figure 2.
Full text of “1. Civil IJCSEIERD INVESTIGATION ON ASTM C Rashmi R Pattnaik”
If the failure occurred astm c882 the slant surface, the actual bond strength astm c882 same as the minimum bond strength. Slant shear test method as per ASTM C standard is widely used to measure the bond strength of the repair materials. The composite cylinders were tested for bond strength as per ASTM C procedure after 28 days of casting.
It was observed that in the subsequent 28 days during which the composite cylinders were cured, the astm c882 mortar registered only an additional 6. The proportions of the materials used in preparing astm c882 substrate mortar were based on a cement-to-sand mass ratio of 1: While, repair material E failed in the repair material due to the compressive strength close to the substrate mortar. Search the history of over billion web pages on the Internet.
Figures 2 b and c show the failure of the composite cylinder in substrate and repair material, respectively, indicating a weaker material strength than the bond strength at the interface. Effect of Differences in Compressive Strength Table 1 shows the compressive strength of substrate and repair materials, and the bond strength of the repair materials. It can be observed from the results in Tables 1 that the repair materials A, B, C and D failed in the substrate mortar because of higher compressive strength than the substrate astm c882.
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This provided a means to evaluate the influence of the disparity of the mechanical properties of the repair and substrate materials on the bond strength of the composite cylinder. Warning —Fresh astm c882 cementitious mixtures are caustic and may cause chemical burns to exposed astm c882 and tissue upon prolonged exposure.
If you need more info or have any questions, please note the Lab ID number and contact us at:. The values stated in each system may not astm c882 exact equivalents; therefore, each system shall be used independently of the other.
Therefore, it is observed that for a good bond strength between repair material and substrate mortar the failure occurred in the substrate mortar or on the repair material rather than at the interface.