AN EXPERINMENTAL INVESTIGATION ON PROPERTIES OF GLASS FIBRE REINFORCED MORTAR
Author(s):
b.sandhya madhu latha, D.Ravi Kanth
Keywords:
plasticisers, Poly propylene fibre STEALTHe3, resistant fibre CEM- FIL, Zr O2 & Si O2, C-S-H gel & CaOH2
Abstract
Concrete mortar posses very low tensile strength ,limited ductility and little resistance to cracking. Addition of small closely spaced, uniformly distributed fibres act as crack arrester, Substantially increase static & dynamic properties With increasing water content bleeding , plastic shrinkage, reduction in strength will occur. With decreasing water content hydration process is incomplete, increase in gel/ space ratio will happens. By adding plasticisers and other chemicals for workability & to achieve strength will act temporarily. To come across these two problems by the addition of small amount of fibres effectively control early age plastic shrinkage & cracking. In the present work two types of fibres Poly propylene fibre STEALTHe3, Alkali resistant fibre CEM- FIL was used. PPfibre act mechanically in the cement mortar & act as crack arrester with increased Flexural, Compressive, Split tensile strength properties. AR fibre act chemically with the cement mortar by the formation of Zr O2 & Si O2 .These two oxidants act with the C-S-H gel & CaOH2 which are by products of hydration , by increasing alkali content in the cement mortar, and durability properties and are shown in my work. Both fibres have increased mechanical & durability properties when compared to control mix. In water absorption test both fibres have no effect because fibre will evaporate at the temp. of 1100C. When compared to HCl ,H2SO4 shows more loss of weight because of the action of sulphates on the cement mortar and as time is going on byproduct CaOH2 leached away from the mortar. Finally as result we conclude that addition of small amount of fibres will increase 5 to 15 % in strength and durability properties of cement mortar.
Article Details
Unique Paper ID: 145066

Publication Volume & Issue: Volume 4, Issue 7

Page(s): 238 - 242
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