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.
|Published (Last):||15 November 2018|
|PDF File Size:||8.89 Mb|
|ePub File Size:||18.57 Mb|
|Price:||Free* [*Free Regsitration Required]|
Slant shear test method as per ASTM C standard is widely used to measure the bond strength of the repair materials. The experimental astm c882 consisted of casting 24 substrate mortar astm c882 in 76 mm 3-in. 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.
Full text of ” 1. It was observed that in the subsequent astm c882 days during which the composite cylinders were cured, the substrate mortar registered only an additional 6.
Also, Tables 1, indicate the failure type observed in the composite cylinders. This 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.
In cases where the failure of the composite cylinder was not on the slant surface, a composite compressive strength was determined. If the failure occurred on the slant surface, the actual bond strength is same as the astm c882 bond strength. 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.
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 astm c882 materials.
The technical data sheet astm c882 for selection of these repair materials are mostly based astm c882 ASTM test procedures. In astm c882 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.
In conducting the bond tests on the repair materials, three different modes of failures were observed as astm c882 in Figure 2. 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 astm c882 tensile strength corresponding to the compressive strength of the repair material. The composite cylinders were tested for bond strength as per ASTM C procedure after 28 days of casting.
When the compressive strength ratio between repair material and substrate mortar is approximately 1. Instructions Submit 1 quart of product and desired application rate. Order Form 2 Email complete form to contact listed below.
A modified slant shear test designed to enforce adhesive failure, Construction and Building Materials 41, pp astm c882. A specific hazard astm c882 is given in Astm c882 8. In these tests the compressive strength of repair materials gained rapidly up to 28 days.
The findings from this research will help the engineers in charge of selection of repair materials for durable concrete repair.
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 mortar and astj materials, respectively. Historical Version s – view previous versions of standard. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Sample Type Epoxy resin-base bonding systems, Astm c882 resin-base repair mortars, Epoxy resin-base concretes. The failure occurs on slant surface when the compressive strength astm c882 the repair materials are less than the compressive strength of substrate mortar. The details of these tests are astm c882 in the results section.
The astm c882 strength calculated based on this test astm c882 assumes the failure of the composite cylinder occurs preferentially on the slant astm c882. In case of composite cylinders that failed in substrate the compressive strength of repair materials are 1.
Evaluation astm c882 test methods for measuring the bond strength of portland cement based repair material to concrete, Cement, Concrete and Aggregate 1 1 pp. Compressive Strength The compressive strength of the astm c882 materials and substrate mortar were determined using 50 mm 2-in cube as per astm c882 ASTM C standard practice, since the repair materials are primarily mortars.
The composite cylinders were de-molded 24 hours after casting, and kept for moist curing. 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.
In the ASTM C specification, the bond strength between the repair material and substrate concrete is determined using the slant shear test method as specified in ASTM C test procedure. 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 mortar.
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. 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. In contrast, astm c882 specimens zstm repair materials cast alongside the composite cylinders exhibited a rapid gain in compressive strength, ranging from 31 MPa to astm c882 MPa 4, to 12, psi.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory astm c882 prior to use. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
It was also observed that the failure of the x882 cylinders occur on the interface, if the compressive strength of repair materials are lower than the compressive strength of the substrate mortar. A dummy section shall be machined asttm a astm c882 material that is not attacked by Portland-cement mortar.
Therefore, it is observed that for a good bond strength between repair material and substrate mortar astm c882 failure occurred in d882 substrate mortar or on the repair material rather than at the interface.
The test method covers bonding hardened concrete to hardened or freshly-mixed concrete. Work Item s – proposed astm c882 of this standard. The substrate mortar astm c882 cast 35 days earlier than repair materials, did not exhibit significant changes in their compressive strengths when tested alongside the repair materials.
Search the history of over billion web pages on the Internet.
Astm c882 of Differences in Compressive Strength In order to investigate the influence of differences in compressive strength of the repair and substrate materials astm c882 the bond strength of the repair material, composite cylinder specimens were prepared as per the ASTM C test method. 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 of the substrate mortar.
Full text of “1. Civil IJCSEIERD INVESTIGATION ON ASTM C Rashmi R Pattnaik”
The cubes of the repair materials were tested in compression at 28 days. The testing machine shall be as described. However, a principal tensile stress is also exerted in astm c882 direction asstm to the applied compressive load.