Behavior of fiber reinforced concrete for controlling the rate of cracking in canal-lining. (30th November 2017)

• Record Type: Journal Article
• Authors: Zia, Asad; Ali, Majid
• Is Part Of: Construction & building materials. Volume 155(2017)
• Page Start: 726
• Page End: 739
• Publication Date: 2017-11-30
• Subjects: A aggregate -- C cement -- CCE compressive cracked absorbed energy (MPa) -- CPE compressive pre-crack absorbed energy (MPa) -- CS compressive strength (MPa) -- CTE compressive total absorbed energy (MPa) -- CTI compressive toughness index (−) -- FCE flexural cracked absorbed energy (kN·mm) -- FPE flexural pre-crack absorbed energy (kN·mm) -- FRC fiber reinforced concrete -- FRCs fiber reinforced concretes -- FS flexure strength (MPa) -- FTE total flexural absorbed energy (kN·mm) -- FTI flexural toughness index (−) -- JF jute fibers -- JFRC jute fiber reinforced concrete -- kN kilo-Newton -- LS linear shrinkage (mm) -- mm millimetre -- MoR modulus of rupture (MPa) -- MPa mega Pascal -- NF nylon fibers -- NFRC nylon fiber reinforced concrete -- PC plain concrete -- PPF polypropylene fibers -- PPFRC polypropylene fiber reinforced concrete -- S sand -- SCE splitting-tensile cracked absorbed energy (kN·s) -- s second -- SPE splitting-tensile pre-crack absorbed energy (kN·s) -- SS splitting-tensile strength (MPa) -- STE splitting-tensile total absorbed energy (kN·s) -- STI splitting-tensile toughness index (−) -- WA water absorption (%) -- W/C water-cement -- Δ deflection (mm) -- Δo deflection at the maximum load (mm) -- εo strain at the maximum stress (−); Concrete -- Canal-lining -- Seepage -- Shrinkage -- Water absorption -- Water losses -- Cracking -- Mechanical properties -- Jute fiber reinforced concrete -- Nylon fiber reinforced concrete -- Polypropylene fiber reinforced concrete; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.08.078
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Reduction in the rate of cracking in concrete canal-lining is aimed. Concrete reinforced with fibers (i.e. jute, nylon, and polypropylene) is examined. Mechanical properties, water absorption, and linear shrinkage are investigated. Plain concrete is taken as reference for comparison. A significant enhancement in considered properties is noticed. Abstract: Seepage is a major water loss (20–30%) from the canal as compared to the other forms of water losses. Concrete is commonly used for canal-lining to reduce the seepage loss. Considerable seepage (15–20%) has been observed even in the cement–concrete conventional sections. The performance of canals decreases with an increase in the rate of cracking in concrete canal-lining. The rate of cracking in canal-lining can be reduced by improving the flexure, compressive, and splitting-tensile strengths of concrete. Out of these, splitting-tensile strength of concrete plays a vital role in controlling cracks. The use of fibers for characteristics improvement of concrete is very ancient. Natural fibers include many benefits, like low cost due to its abundance, least health hazards, and flexibility. The use of synthetic fibers as reinforcement in matrix has also attained intentness by reasons of its high strength, less water absorption, and low density in nature. The overall aim of the research program is to explore materials for better performance of canal-lining in terms of reduced water losses by controlling its rate of cracking due to alternate wetting and drying, and due to differential settlement, etc. The purpose of this work is to examine experimental behaviors of jute fiber reinforced concrete (JFRC), nylon fiber reinforced concrete (NFRC), and polypropylene fiber reinforced concrete (PPFRC) for controlling the rate of cracking in canal-lining. For this purpose, the mechanical properties (compressive, splitting-tensile, and flexure strengths, energies, and toughness indices), water absorption, and linear shrinkage of JFRC, NFRC, and PPFRC are determined experimentally as per ASTM standards. The properties of plain concrete (PC) are used as reference. The proportion of 1:3:1.5:0.7 (cement: sand: aggregate: water) is used for PC mix. The mixes of JFRC, NFRC, and PPFRC are manufactured by adding the jute fibers, nylon fibers, and polypropylene fibers, respectively, in the same mix design as that of PC. For production of each type of fiber reinforced composite (FRC), fibers having length of 50 mm are added in concrete by an amount of 5% (by mass of cement). A reduction in compressive properties, and an improvement in splitting-tensile and flexural strengths, water absorption and linear shrinkage is exhibited by FRCs over that of PC. Among the tested FRCs, PPFRC shows better performance. This may ensure to control the rate of cracking in canal-lining, ultimately improving its performance.