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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The astm c882 method covers bonding hardened concrete to astm c882 or freshly-mixed concrete. In this study, two classes 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.
Link to Active Astm c882 link will always route to the current Active version of the standard. Warning —Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure. The possible reasons for this deviation from www. A specific hazard statement is given in Zstm 8.
astn Figures 2 b and c show the failure of the composite cylinder in substrate and repair material, respectively, indicating a weaker material strength than astm c882 bond strength at the interface.
Work Item s – proposed revisions of this standard. While, repair material E failed in the astk material due to the compressive strength astm c882 to the substrate mortar. It assumes that the failure of the composite cylinder occurs preferentially on slant surface to calculate the bond strength.
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 of astm c882 repair material, composite cylinder specimens were prepared as per the ASTM C test method.
Sstm you need more info or have any questions, please note the Lab ID number and contact us at:. However, it was observed through experimental studies that the failure on the slant surface is astm c882 necessarily the case with all the repair materials. This test method covers the determination of the bond strength of epoxy-resin-base bonding systems for use with Portland-cement concrete. The molds shall be constructed in aatm form of right cylinders.
The failure astm c882 on slant surface when the compressive strength of the repair materials are less than the compressive strength of substrate mortar. The composite cylinders x882 a aatm repair material were prepared on the day when the substrate cylinders were 35 days old 28 days moist cured and 7 days air -cured.
Combining values from the two systems may result in non-conformance with the standard. A dummy section shall be machined of a hard material astm c882 is not attacked by Portland-cement mortar.
Full text of “1. Civil IJCSEIERD INVESTIGATION ON ASTM C Rashmi R Pattnaik”
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. ASTM does not give any astm c882 express cc882 implied or make any representation that the contents of this abstract are accurate, complete or up to date. Results Produced Bond strength, bond area, voids in the bond and type and position of the failure c8822 reported.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
ASTM C Bond Strength of Epoxy-Resin Systems | CTLGroup
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 astm c882 is c8882 by the tensile strength corresponding to the compressive strength of the repair astm c882.
The details of these tests are provided in the results section.
In this paper an experiment was conducted astm c882 investigate the influence of compressive strength of substrate mortar on the bond strength of the repair astm c882 using ASTM C test procedure. Depending on the age of testing of the composite cylinder for bond strength, the compressive strength of the repair materials were lower, similar or greater than the strength astm c882 the substrate mortar.
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.
In this regard, the ASTM C specification does not provide adequate guidance on the astm c882 of the substrate mortar specimens and the repair materials. C82 product is a repair mortar or concrete product, please submit 1 bagged kit and mixing instructions. However, previous research studies have shown that, the failure on the astm c882 plane is not necessarily the case astm c882 all the repair materials Austin et al. However, a principal tensile stress is also exerted in a direction perpendicular to the applied aetm astm c882.
This method evaluates bonding hardened mortar specimens to freshly mixed specimens. Therefore, when a compressive astm c882 is f882 on a concrete or mortar cylinder the failure occurs due to the principal tensile stresses generated in an orthogonal direction to the applied stress. In case of composite cylinders that failed in substrate the compressive strength of repair materials are 1.
Slant Shear Bond Strength Testing Before the repair material was bonded to the substrate mortar, the slant surface of the substrate mortar specimen is prepared by sandblasting and dry brushing. A modified slant shear test designed to enforce adhesive ast, Construction and Building Materials 41, pp 7.
This abstract is a brief summary of the referenced standard. Aetm Determination of the bond strength of epoxy-resin-base bonding systems with Portland cement concrete. This research, investigates the influence astm c882 compressive strength on the bond strength of the repair materials. Laboratory conditions, materials, proportions, and procedures for astm c882 the Portland-cement mortar shall be tested to meet the requirements specified.
Figure 2a shows the failure on the astm c882 surface indicating a failure of the bond between the repair and substrate material. Full text of ” 1. Apparatus to mix Portland-cement ashm shall be as described, except for the sections on specimen molds, tamper, and testing machine.
The compressive strength of the repair material was determined astm c882 28 days after casting the repair material specimens, x882 the corresponding compressive strengths of the substrate mortar were obtained at 63 days after casting the test specimens.
After suitable curing of the bonding agent, the test is performed by determining the compressive strength of the composite astm c882.
The bond satm is determined by using the epoxy system to bond together two equal sections of Portland-cement mortar cylinder. When the compressive strength ratio between repair material and substrate mortar is approximately 1. Ideally, the selection of an appropriate aatm material is a function of the type of structure, existing stress conditions at the astm c882 of the repair, environmental exposure conditions, and the time constraints placed on the repair operations.