Testing bond strength of masonry.

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Published by Building Research Establishment in Watford .

Written in English

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SeriesBRE digest -- 360
ContributionsBuilding Research Establishment.
ID Numbers
Open LibraryOL20655022M
ISBN 100851254950
OCLC/WorldCa59970702

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These test methods are intended to provide simplified and economical means for gathering comparative research data on the flexural bond strength developed with different types of masonry units and mortar or for the purpose of checking job quality control (materials and workmanship).

Withdrawn Rationale: This test method provides two procedures for measuring bond strength of mortar to masonry units: a crossed brick couplet tensile test for evaluating mortar-brick bond strength and a stacked-bond, flexural test for evaluating mortar-concrete block bond strength.

Masonry Mortar Specifications. ASTM C (masonry mortar) ASTM C91 (masonry cement) ASTM C (mortar cement) Test Methods. ASTM C (compressive strength) ASTM C (autoclave expansion) ASTM C (bond strength) ASTM C (masonry mortar analysis) ASTM C (flexural bond strength) ASTM C (hardened mortar analysis) ASTM C (flexural.

Improved method of testing tensile bond strength of masonry mortars (Bulletin / Research and Development Laboratories of the Portland Cement Association. Research Dept) [Kuenning, William H] on *FREE* shipping on qualifying offers.

Improved method of testing tensile bond strength of masonry mortars (Bulletin / Research and Development Laboratories of the Portland Cement Author: William H Kuenning. nor of the masonry (i.e., wall) compressive strength. Specifica-tion for Masonry Structures (ref.

6) includes two alternatives for documenting masonry compressive strength; one based on the type of mortar and the compressive strength of the masonry units; the other based on File Size: KB. Inadequate bond strength will inevitably lead to cracking in masonry construction.

Because this cracking is a brittle mode of failure and there is often little scope for redistribution of stresses, there is potential for widespread damage if bond strength is inadequate.

The weakness might become apparent only when the masonry is subjected to anFile Size: KB. Shear testing of stack bonded masonry. Determination of initial shear strength” [10]. Here, the testing method adopted is the Saxer E L.

Tests on structural bond of masonry mor tars to. ASTM EStandard Test Methods for Flexural Bond Strength of Masonry. ASTM CStandard Test Method for Measurement of Flexural Bond Strength. In addition to the preceding standards, other standards, while not generally used for quality assurance testing.

The material properties of mortar which influence the structural performance of masonry are compressive strength, bond strength and elasticity.

Because the compressive strength of masonry mortar is less important than bond strength, workability and water retentivity, the latter properties should be given principal consideration in mortar selection.

Mortar cement (ASTM C, ref. 4j) is a hydraulic Testing bond strength of masonry. book similar to masonry cement, with the added requirement of a minimum bond strength requirement. Blended hydraulic cements (ASTM C, ref. 4g) consist of standard portland cement or air-entrained portland cement (denoted by -A) combined through blending with such materials as blast furnace.

Building mortar (Scanned copy) by BRE (Jun) £ Download this book (PDF) Book Description. Please note that this is a scanned copy of a paper originally published inso the text is not as clear as in documents created as pdf files. Testing bond strength of masonry (Scanned copy).

ASTM C looks similar to other masonry unit standards developed through ASTM, and covers: 1) minimum requirements for constituent materials, 2) sampling and testing criteria, and; 3) requirements for minimum compressive strength, minimum freeze-thaw durability, minimum bond strength, maximum drying shrinkage, and physical dimensions.

Sarangapani et al. () have focused on the relationship between shear bond strength and masonry compressive strength. Reddy and Vyas () have examined the impact of the bond strength of.

The American Society for Testing and Materiais in introduced "Standard Methods of Tests for Flexural Bond Strength of Masonry" E These are laboratory tests in which supports and loadings are well defined. The Brit­ ish Standard Code of Practice for StructUl-al Use or. A Masonry Laboratory Testing Technician is an individual who has demonstrated the knowledge and ability to perform laboratory procedures required for preparation and testing of masonry construction-related materials including brick, structural clay tile, concrete masonry units, prisms, mortars, and grouts.

the masonry if the net area compressive strength of concrete masonry units is 2, psi. 28)When using the Unit Strength Method for Type M mortar, what is the net area compressive strength of A. 1, B.2, C.3, D.2, 29) When transporting grout specimens to the lab, the specimens shall be kept in _____.

The upright position in a protected vehicleFile Size: KB. The purpose of conducting bond wrench tests on a wall that had been previously tested with an air bag to determine if the method outlined in the test procedure, HCTP, was a practical method of in-situ testing, and to compare it with ASTM C which is a method for testing masonry prisms.

Testing compressive strength of masonry before construction and for every m 2 of masonry work during construction is required as per Building Code Requirements and Specification for Masonry Structure (ACI 11) and under its quality assurance program, certification of : Madeh Izat Hamakareem.

BOND STRENGTH OF THE BRICK MASONRY Christy 1, Shanthi 2 and D. Tensing 3 School of Civil Engineering, Karunya University, Coimbatore, Tamil Nadu, India ABSTRACT This paper presents the experimental investigations of small burnt clay brick masonry samples.

The shear bond strength has been obtained from 3 brick triplets. The flexural tensile bond strength of each mortar joint is given for each test method used. A comparison of the results is included in an attempt to correlate the loading sleeve test method results to the bond wrench test results.

MATERIALS Masonry Cement The scope of the work was limited to a type S masonry cement, obtained in 34 kg (75 pound)File Size: KB. I recommend this book for practicing engineers and engineering students. It provides a very thorough but concise overview of nondestructive testing of masonry.

In addition, it provides a good index, a list of manufacturers and references for further research.5/5(1).

This paper deals with an experimental study on flexural bond strength of masonry using various blocks in combination with different mortars. Flexural bond strength of masonry has been determined by testing stack-bonded prisms using a modified bond wrench test set-up.

The effect of mortar composition and strength on the masonry's flexural bond strength using three types of masonry Cited by: The bond between fresh and hardened concrete can be subjected to various stress states depending on the application and service conditions.

Four test methods, reflecting different stress states at the bond between the fresh and hardened concrete, are by: 6. At this scale, the bond zone state may be characterized by concrete and steel material properties (e.g., concrete compressive strength, concrete tensile strength, concrete fracture energy or steel yield strength) that are well defined by standardized tests.

Finally, bond zone representation at this scale enables essentially direct. Brick-mortar bond strength has been determined through flexure bond strength and shear bond strength tests.

A relationship between the masonry prism compressive strength and bond strength has been obtained. The results clearly indicate that an increase in bond strength, while keeping the mortar strength constant, leads to an increase in the.

Planning the evaluation --Conducting a condition survey --Evaluating cracks --Strength testing --Surface techniques --Shear testing --In-place bond wrench --Pulse transmission techniques --Flatjack tests for in-place masonry evaluation --Analyzing wet walls --Miscellaneous techniques.

There is no British Standard for testing existing brickwork, however indicative results for testing brick strength can be obtained using the test method for new bricks. A set of ten whole bricks is required for specification compliance purposes but recognising the difficulties in obtaining bricks from existing masonry this number is sometimes.

Brick-mortar bond strength has been determined through flexure bond strength and shear bond strength tests. A relationship between the masonry prism compressive strength and bond strength has been obtained.

The results clearly indicate that an increase in bond strength, while keeping the mortar strength constant, leads to an increase in the. The strength of a masonry wall is not entirely dependent on the bond between the building material and the mortar; the friction between the interlocking blocks of masonry is often strong enough to provide a great deal of strength on its own.

The blocks sometimes have grooves or other surface features added to enhance this interlocking, and some dry set masonry structures forgo mortar altogether. A Compressive Strength Requirements B.2 Unit strength method Quality assurance A.1 Testing Agency’s services and duties B.1 Inspection Agency’s services and duties Specify f′m except for veneer and glass unit masonry.

Specify when strength of grout is to be determined by Size: KB. During compressive strength tests, the cubic test specimens showed minor dependencies on the fiber material and on the exact print path (C or D) being used.

In contrast, the direction in which the compressive load was put on the samples has a major influence on the test results. All results are summarized in Table for compressive strength and in supplementary material (Table 5.A2) for.

SAMPLING AND TESTING CONCRETE MASONRY UNITS Figure 1—measurement of Web & Face Shell Thickness 1 2 in. (13 mm) A B B Section A-A: Section B-B: 1 2 in. (13 mm) Web height A. information on compressive strength testing is available in references 8 and Calculations Using the data gathered in the preceding test methods, theFile Size: KB.

Khalaf, Fouad M.,“New Test for Determination of Masonry Tensile Bond Strength,” Journal of Materials in Civil Engineering, November/December, pp • Portland Cement Association, a, Bond Strength Testing of Masonry, IS • Portland Cement Association, b, Factors Affecting Bond Strength of Masonry, IS •.

BeforeIBC required the bond strength of SFRM—when tested in accordance with ASTM E,—to be in excess of kPa ( psf). InIBC moved away from a single value for the bond strength of SFRM for all buildings, and implemented bond strength requirements based on the building’s height.

The code maintained the kPa bond strength demand for buildings with a height of less. Use of NDT methods for testing existing masonry structures time to time ensures the quality and strength requirements for intended use. Sometimes, the masonry structure has to be used for purpose other than intended use when designed, in that case, it is essential that the structure is evaluated for new loads or load combinations or additional.

A Study of the Compatibility of Brick and Mortar for Maximizing Masonry Bond. Flexural Bond Strength of Concrete Masonry Prisms Using Masonry Cement. Flexural Bond Strength TestingAn Evaluation of the Bond Wrench Testing. Standard Test Method for Bond Strength of Mortar to Masonry Units (Withdrawn ) ASTM C PRACTICE FOR PREPARATION OF FIELD REMOVED MANUFACTURED MASONRY UNITS AND MASONRY SPECIMENS FOR TESTING.

Epoxy bolting or doweling may be in concrete, masonry, or other materials. Inspections are performed to confirm installation depth, cleanliness of hole, size and grade of dowel/bolt, and epoxy materials used.

Pull testing can also be performed to confirm the bond strength. Masonry. Contents Page Listofsymbols V SIconversionunits VI Abstract 1 uctionandobjective 1 1 als 2 Brick 2 Concretemasonryunits 2 Mortar 3 ecimens 3 Descriptionofwalls 3 Fabricationofwalls 6 File Size: 5MB.

Masonry flexural bond strength is tested using an apparatus known as a bond wrench (Figure 1), which clamps on and applies torque to the top unit of a prism until the bond between the unit and the rest of the prism -Place Testing of Masonry.

An investigation into the shear bond strength of masonry Isidoros Couroupis A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in fulfilment of the requirements for the degree of Master of Science in Engineering. JOHANNESBURG, This document specifies a method for determining the bond strength of horizontal bed joints in masonry using a bond wrench.

Guidance is given on the preparation of the specimens, the conditioning required before testing, the testing equipment, machine, the method of test, the method of calculation and the contents of the test report.ASTM Masonry Standards for the Building Industry.

Test methods for sampling and testing concrete masonry units, brick, mortar, and grout are included, as well as methods for measuring drying shrinkage of concrete block, bond strength of mortar to unit masonry, and water penetration and : $

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