Performance of Carbon Fiber Filament Reinforcing Cement Mortar

Ahmed Hamed El-Sayed Salama,Walid Fouad Edris

doi:10.28991/cej-2021-03091753

Ahmed Hamed El-Sayed Salama, Walid Fouad Edris

Open Access

https://doi.org/10.28991/cej-2021-03091753

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Abstract

This paper aims to study the effect of Carbon Fiber Filament (CFF) with different ratios and lengths on the physical and mechanical properties of cement mortar. An experimental program included 3 cm fixed length of CFF with 0, 0.25, 0.5, 0.75, and 1% different ratios by weight of cement addition were used in cement mortar cubes. Another experimental program of 0.5% CFF ratio with 1, 2, 3, 4, and 5 cm different lengths by weight of cement addition was used in cement mortar prisms. The physical and mechanical properties of cement mortar containing CFF were experimentally investigated at 7 and 28 days of curing. Workability, by means of flow table test, were measured. Density is conducted for cubes and prisms at the age of 28 days. At ages of 7 and 28 days, compressive and flexural strengths were studied. The study showed a reduction in workability with the increase of CFF ratios and lengths by 0.0 to 2.7% and by 0.9 to 5.4% respectively. Moreover, an improvement in density, compressive, and flexural strengths was observed. At ages of 7 and 28 days, the results showed that compressive strength increased by 33 and 31% respectively at 0.5% of CFF ratio while the flexural strength increased by 125 and 327% respectively with CFF length of 5 cm. Doi: 10.28991/cej-2021-03091753 Full Text: PDF

Highlights

Cement is the basic component in mortar manufacturing which is used as binder material
The results showed that the effect of carbon fiber filament (CFF) length addition was more effective than CFF ratio
Cement mortar containing carbon fiber filament (CFF) with 0, 0.25, 0.5, 0.75, and 1% of CFF with different ratios and fixed 3cm length by weight of cement addition were used in cement mortar cubes to specify its compressive strength

Summary

Introduction

Cement is the basic component in mortar manufacturing which is used as binder material. The major cons of cement mortar are resulted from its low tensile resistance, fracture toughness, low cracking resistance, and its brittle failure. Carbon fiber additions are considered as one of the main solutions to increase its toughness and bending resistance of the cement mortar by inhibiting the initiation, and propagation of cracks [1,2,3,4,5]. Interest and knowledge of the properties of carbon fiber for use as a modern building material had increased, as it is an environmentally friendly material with a high safety factor, and it helped to improve the structural composition of cement mortar [9,10,11,12,13]

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