An Experimental Investigation into theMechanical Properties of New Natural Fiber Reinforced Mortar

Abstract

Since the starting the 21st century, there is an increased awareness that non-renewable resources are becoming scarce, and dependence on renewable resources is growing. The 21st century may be the cellulosic century as we look more and more to renewable plant resources for products. It is easy to say that natural fibers are renewable and sustainable. Although the use of these materials is not new, horse hair was used in mortar and straw for mud bricks, and many plants types like sisal, coir, bamboo, jute, akwara, elephant grass…etc. In this papers, a human hair fibers (HHF) is studied as a reinforced material in cementitious material. A total of 86 concrete specimens (Cubes, cylinders, prisms and plates) are tested to study the effect of including human hair fibers HHF reinforcement on the mechanical properties of flowable mortar fiber reinforced concrete. Fibers of different lengths and equivalent diameters were used with an aspect ratio ranged from 500 to 700, fiber content ranges from zero to 1 percent by volume. The influence of fiber content on the compressive strength, splitting tensile strength, flexural strength and load deflection is presented for two w/c ratios (0.6 and 0.7). An improvement in the energy absorption capacity due to the fiber addition is observed, and the optimum fiber volume fracture is seen to be 0.8%. The experimental findings in our tested samples will encourage future researches in this direction for long term performance to extending this cheap type of fibers for use in structural applications especially for low strength cementitious materials. ‫ﺟدﯾد‬ ‫ﺑﻧوع‬ ‫اﻟﻣﺳﻠﺣﺔ‬ ‫اﻟﺳﻣﻧت‬ ‫ﻟﻣوﻧﺔ‬ ‫اﻟﻣﯾﻛﺎﻧﯾﻛﯾﺔ‬ ‫اﻟﺧواص‬ ‫دراﺳﺔ‬ ‫اﻟطﺑﯾﻌﯾﺔ‬ ‫اﻻﻟﯾﺎف‬ ‫ﻣن‬ ‫اﻟﺧﻼﺻﺔ‬ ‫اﻟ‬ ‫ﺔ‬ ‫ﺑداﯾ‬ ‫ذ‬ ‫ﻣﻧ‬ ‫رن‬ ‫ﻘ‬ 21 ‫ﺎدرة‬ ‫ﻧ‬ ‫ﺑﺣت‬ ‫اﺻ‬ ‫ددة‬ ‫اﻟﻣﺗﺟ‬ ‫ﺎدر‬ ‫اﻟﻣﺻ‬ ‫ﺎن‬ ‫ﺑ‬ ‫وﻋﻲ‬ ‫اﻟ‬ ‫ازدادت‬. ‫ﺎد‬ ‫اﻻﻋﺗﻣ‬ ‫ت‬ ‫ﻓﻧﻣ‬ ‫ددة‬ ‫اﻟﻣﺗﺟ‬ ‫ﺎدر‬ ‫اﻟﻣﺻ‬ ‫ﻰ‬ ‫ﻋﻠ‬ , ‫رن‬ ‫ﻗ‬ ‫ﻣﯾﺔ‬ ‫ﺗﺳ‬ ‫ن‬ ‫وﯾﻣﻛ‬ 21 ‫ﻣﻧﺗﺟ‬ ‫ﻰ‬ ‫اﻟ‬ ‫ر‬ ‫اﻟﻧظ‬ ‫د‬ ‫ﻋﻧ‬ ‫ﻠﯾﻠوزي‬ ‫اﻟﺳ‬ ‫ﺎﻟﻘرن‬ ‫ﺑ‬ ‫ﺎت‬ ‫اﻟﻧﺑﺎﺗﯾﺔ‬ ‫اﻟﻣﺻﺎدر‬. ‫ﺗﻣرة‬ ‫وﻣﺳ‬ ‫ددة‬ ‫ﻣﺗﺟ‬ ‫ﺎدر‬ ‫ﻣﺻ‬ ‫ھﻲ‬ ‫ھﻲ‬ ‫اﻟطﺑﯾﻌﯾﺔ‬ ‫اﻻﻟﯾﺎف‬ ‫ﺑﺎن‬ ‫اﻟﻘول‬ ‫ﻓﯾﻣﻛن‬. ‫ن‬ ‫ﻣ‬ ‫ﺎﻟرﻏم‬ ‫ﺑ‬ ‫دة‬ ‫ﺟدﯾ‬ ‫ر‬ ‫ﯾﻌﺗﺑ‬ ‫ﻻ‬ ‫واد‬ ‫اﻟﻣ‬ ‫ذا‬ ‫ھ‬ ‫ان‬ , ‫ﻧﺎﻋﺔ‬ ‫ﺻ‬ ‫ﻲ‬ ‫ﻓ‬ ‫ش‬ ‫اﻟﻘ‬ ‫ﺗﻌﻣل‬ ‫واﺳ‬ ‫ﺔ‬ ‫اﻟﻣوﻧ‬ ‫ﻲ‬ ‫ﻓ‬ ‫ﺗﻌﻣل‬ ‫اﺳ‬ ‫ﺎن‬ ‫اﻟﺣﺻ‬ ‫ﻌر‬ ‫ﻓﺷ‬ ‫اﻟطﯾﻧﻲ‬ ‫اﻟطﺎﺑوق‬ , ‫ﯾزال‬ ‫اﻟﺳ‬ ‫ﺎت‬ ‫ﻛﻧﺑ‬ ‫ﺔ‬ ‫اﻟطﺑﯾﻌﯾ‬ ‫ﺔ‬ ‫اﻟﻧﺑﺎﺗﯾ‬ ‫ﺎف‬ ‫اﻻﻟﯾ‬ ‫واﺳﺗﻌﻣل‬ ‫ﻛﻣﺎ‬ , ‫دي‬ ‫اﻟﮭﻧ‬ ‫ف‬ ‫اﻟﻠﯾ‬ , ‫زران‬ ‫اﻟﺧﯾ‬ , PDF created with pdfFactory Pro trial version www.pdffactory.com 1871 ‫وﻏﯾرھﺎ‬ ‫اﻟﺟوت‬ ‫ﻧﺑﺎت‬. ‫ﻟﺑﺣث‬ ‫ھذا‬ ‫ﻓﻲ‬ , ‫ﻓﺣص‬ ‫ﺗم‬ ‫ﻟﻘد‬ 86 ‫ﺎ‬ ‫ﻧﻣوذﺟ‬) ‫ﺎت‬ ‫ﻣﻛﻌﺑ‬ , ‫طواﻧﺎت‬ ‫اﺳ‬ , ‫ور‬ ‫اﻟﻣوﺷ‬ , ‫ﻊ‬ ‫ﻣ‬ ‫ﺔ‬ ‫اﻟرﻗﯾﻘ‬ ‫ﻔﺎﺋﺢ‬ ‫اﻟﺻ‬ (‫ﺔ‬ ‫اﻟﻣﯾﻛﺎﻧﯾﻛﯾ‬ ‫ﻔﺎت‬ ‫اﻟﺻ‬ ‫ﻰ‬ ‫ﻋﻠ‬ ‫ﻠﯾﺢ‬ ‫ﻛﺗﺳ‬ ‫ﺎن‬ ‫اﻻﻧﺳ‬ ‫ﻌر‬ ‫ﺷ‬ ‫ﺎف‬ ‫اﻟﯾ‬ ‫ﺎﻓﺔ‬ ‫اﺿ‬ ‫ﺄﺛﯾر‬ ‫ﺗ‬ ‫ﺔ‬ ‫ﻟدراﺳ‬ ‫ﻟﻠ‬ ‫اﻟﺷﻌر‬ ‫ﺑﺄﻟﯾﺎف‬ ‫اﻟﻣﺳﻠﺢ‬ ‫اﻟﻣﺳﯾل‬ ‫ﻛوﻧﻛرﯾت‬. ‫و‬ ‫ﺔ‬ ‫ﻣﺧﺗﻠﻔ‬ ‫وال‬ ‫اط‬ ‫ذات‬ ‫ﺎف‬ ‫اﻟﯾ‬ ‫ﺗﻌﻣﺎل‬ ‫اﺳ‬ ‫م‬ ‫ﺗ‬ ‫د‬ ‫ﻟﻘ‬ ‫ر‬ ‫ﻗط‬ ‫دل‬ ‫ﺑﻣﻌ‬ ‫ﺎوي‬ ‫ﯾﺳ‬ ‫ﺑﺔاﻟﻧﺣﺎﻓﮫ‬ ‫ﻧﺳ‬ ‫دود‬ ‫ﺣ‬ ‫ﻰ‬ ‫ﻋﻠ‬ ‫ول‬ ‫ﻟﻠﺣﺻ‬ ‫ﯾن‬ ‫ﻣﻌ‬ 500-700. ‫ﺔ‬ ‫ﻣﻘﺎوﻣ‬ ‫ﻰ‬ ‫ﻋﻠ‬ ‫ﻲ‬ ‫اﻟﻠﯾﻔ‬ ‫ﺄﺛﯾر‬ ‫اﻟﺗ‬ ‫ﺔ‬ ‫دراﺳ‬ ‫م‬ ‫وﺗ‬ ‫ﻐط‬ ‫اﻟﺿ‬ , ‫ل‬ ‫اﻟﺣﻣ‬ ‫ﺎت‬ ‫ﻣﻧﺣﻧﯾ‬ ‫ﺔ‬ ‫دراﺳ‬ ‫ذﻟك‬ ‫وﻛ‬ ‫ﺎء‬ ‫اﻻﻧﺣﻧ‬ ‫ﺔ‬ ‫ﻣﻘﺎوﻣ‬ ‫و‬ ‫ﺣب‬ ‫اﻟﺳ‬-‫ن‬ ‫ﻣ‬ ‫ﺔ‬ ‫ﻣﺧﺗﻠﻔ‬ ‫ب‬ ‫ﻟﻧﺳ‬ ‫راف‬ ‫اﻻﻧﺣ‬ ‫اﻟﻣﺎء‬ \ ‫ﻣﻧت‬ ‫اﻟﺳ‬) 0.6 ‫و‬ 0.7 .(‫ﺔ‬ ‫اﻟﺣﺟﻣﯾ‬ ‫ﺑﺔ‬ ‫ﺑﺎﻟﻧﺳ‬ ‫ف‬ ‫اﻟﻠﯾ‬ ‫ﺎﻓﺔ‬ ‫اﺿ‬ 0.8 % ‫ﻣ‬ ‫ل‬ ‫ﻛ‬ ‫ﺔ‬ ‫ﻣﻘﺎوﻣ‬ ‫ﺎدة‬ ‫زﯾ‬ ‫ﻰ‬ ‫اﻟ‬ ‫ادى‬ ‫ن‬ ‫اﻟﺿﻐط‬ , ‫واﻻﻧﺣﻧﺎء‬ ‫اﻟﺳﺣب‬ ‫وﻛﺎﻧت‬ 0.8 % ‫اﻟﺗطور‬ ‫ﻟﮭذا‬ ‫ﺟدا‬ ‫اﻟﻣﺛﺎﻟﯾﺔ‬ ‫اﻟﺣﺎﻟﺔ‬. ‫وف‬ ‫ﺳ‬ ‫ث‬ ‫اﻟﺑﺣ‬ ‫ﺗﺟدات‬ ‫ﻣﺳ‬ ‫اﻻﻟﯾﺎف‬ ‫ﻣن‬ ‫اﻟرﺧﯾص‬ ‫اﻟﻧوع‬ ‫ھذا‬ ‫ﻣﺟﺎل‬ ‫ﻓﻲ‬ ‫اﻻﺑﺣﺎث‬ ‫زﯾﺎدة‬ ‫اﻟﻰ‬ ‫ﯾؤدي‬. ‫ﮫ‬ ‫ﻛﻔﺎءﺗ‬ ‫ر‬ ‫اظﮭ‬ ‫اﻻﻟﯾﺎف‬ ‫اﺿﺎﻓﺔ‬ ‫ان‬ ‫اﻟﻘﻠﯾﻠﺔ‬ ‫اﻟﻣﻘﺎوﻣﺔ‬ ‫ذات‬ ‫اﻟﺳﻣﻧت‬ ‫اﻻﻧواع‬ ‫ﻓﻲ‬ ‫اﻟﻧﻣﺎذج‬ ‫ﻣﻘﺎوﻣﺔ‬ ‫زﯾﺎدة‬ ‫ﻓﻲ‬