Experimental Study of Fiber Reinforcement Mortar and its Application in Masonry Structure
Keywords:
cement I.S 1489:(Part I fly ash based), RECRON 3s fiber, fine aggregate, coarse aggregate, brick-I class, water, standard sandAbstract
Structures built with brick units bonded together by mortar in between are called brick masonry structure, and very common in India. Masonry is made up of two distinct and very different components –the brick themselves, and, the mortar which have different material properties, with brick usually having a higher strength and stiffness compared to mortar. Further mortar is usually cementations material having little tensile strength and showing brittle behavior. Use of appropriate reinforcement in mortar could substantially improve the performance of brick masonry of shear, bond, compression, energy, absorption (toughness) and crack resistance and this thesis investigated the improvements in the case when short fibers are used. An attempt was made to study the properties of fiber reinforcement mortar (FRM) and its application in masonry structures using appropriate experiments. Cement sand mortars were cast using different volumes of fibers and tested in compression and spilt tension. After narrowing down the range of suitable mix proportions, compression and shear bond tests were performed using appropriately prepared brick masonry units (BMUs) prepared with plain mortar and FRM. In the first part of study, the tests were carried out in accordance with ASTM C780, and other relevant Indian specification. For testing the BMUs, the compression tests were carried out according to standardized procedures, but an original procedure had to be developed for testing the BMU in shear. As far as the effect of fiber addition or mortar properties is concerned, it was found that as fiber is added to the matrix, the compressive strength increases by only 5-10% while the ultimate deformation decreases. However, the increase in the split tensile strength and the toughness was found to be 18-25% and 4-5 times, respectively. Whereas specimens without fiber content between 0.1% and 0.25%, showed capability to take load even after the ultimate load has been reached.
References
. ACI Manual 544.1R - Fiber Reinforced Concrete (Table 4.1) .
. Indian Journal of Science and Technology, Vol.4, No.8, August 2011.
. Anderson,D.E, and Hoffman, E.S. Design of Brick Masonry Columns, Proceedings of fist International conference on masonry structural system, UniversityTexas Texas, Austin, pp.94-100,1969.
. ASTM C 1314-03b : Standard Test Method for compressive strength of Masonry prisms, ASTM fourth edition,2001.
. IS 1542 : Indian standard sand for plaster – specification, Bureau of Indian Standard , 1992( Reprint Feb 1999 ).
. IS 2116: Indian standard specification for sand for masonry mortar Bureau of Indian Standard , 1980 ( Reprint Feb 1999 ).
. IS 2250: Indian standard Code of practice for preparation and use of Masonry mortar , Bureau of Indian Standard , 1981 ( Reprint Feb 1993).
. IS 1489: (Part 1 Fly Ash based ): Indian standard specification Portland Pozzolana Cement , Bureau of Indian Standard , 1991 Third Revision ( Reprint March 1993).
. IS 3495:Method of Test of Burnt Clay Building Brick -Part 1: Determination of compressive strength , Bureau of Indian Standard , 1981 Part 1 to 4 : 1993.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors contributing to this journal agree to publish their articles under the Creative Commons Attribution 4.0 International License, allowing third parties to share their work (copy, distribute, transmit) and to adapt it, under the condition that the authors are given credit and that in the event of reuse or distribution, the terms of this license are made clear.
