scholarly journals Effect of Resins / Exudates Inhibited Steel on the Flexural strength of Reinforced Concrete Beam under Corrosive Environment

2019 ◽  
Vol 1402 ◽  
pp. 022030
Author(s):  
K A Sambowo ◽  
P Prihantono ◽  
R A Sumarsono ◽  
P Kusumawardhana ◽  
I Widiasanti

Author(s):  
Nazim Abdul Nariman ◽  
Martin Husek ◽  
Ilham Ibrahim Mohammad ◽  
Kaywan Othman Ahmed ◽  
Diyako Dilshad ◽  
...  

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1137 ◽  
Author(s):  
Jongho Park ◽  
Sun-Kyu Park ◽  
Sungnam Hong

In this study, nine specimens were experimentally tested to analyze the strengthening efficiency of textile-reinforced mortar (TRM) and the difference in flexural behavior between prestressed and non-prestressed TRM-strengthened reinforced concrete beam. The test results show that TRM strengthening improves the flexural strength of TRM-strengthened reinforced concrete beams with alkali-resistant-(AR-) glass textile as well as that with carbon textile. However, in the case of textile prestressing, the strengthening efficiency for flexural strength of the AR-glass textile was higher than that of the carbon textile. The flexural stiffness of AR-glass textiles increased when prestressing was introduced and the use of carbon textiles can be advantageous to reduce the decreasing ratio of flexural stiffness as the load increased. In the failure mode, textile prestressing prevents the damage of textiles effectively owing to the crack and induces the debonding of the TRM.


2017 ◽  
Vol 6 (1) ◽  
pp. 8
Author(s):  
Agus Maryoto ◽  
Sugeng Waluyo ◽  
Yanuar Haryanto ◽  
Nor Intang Setyo Hermanto

The waste tire is produced more than 10 million tons every year in the world. This problem needs serious treatment to eliminate the waste tires. This work is aimed to recycle the waste tire in concrete as a reinforcement. The contribution of the waste tires in flexural strength capacity of concrete is investigated by using experimental work and numerical simulation. Since material is quite non-homogenous compared to the pure concrete, we use six concrete beam specimens with dimension 150 mm x 150 mm x 1000 mm to get better fitting results. One specimen is non reinforced concrete beam and five specimens are waste tires reinforced concrete beam. For each of the five specimen, the waste tire reinforcement is tensioned with 0%, 17%, 25%, 40% and 60% strain before casting the concrete. The flexural strength tests are conducted after 28 days concrete ages under three point loadings. After the test, we observe that the waste tire reinforcement together with pre-stress contribute significantly on the flexural strength of the concrete beam as predicted. Finally, to support the test, finite element analysis is performed as well in this work and compared with the experimental results.


The work aims to compare the flexural behavior of concrete beam using addition of steel fibers and glass fibers with normal beam in M30 grade concrete and to find the cracks developed in the concrete beam. Experiments include Compression test, Tensile strength and Flexural strength. In this study the performance of fiber reinforced concrete(FRC) beams under two- point loading system is discussed and comparative studies were made with normal mix concrete. In this study, we are casted the cube for 7 days and beam only for 28 days. The percentage addition by mass of cement for steel fiber is 1.5 % and percentage addition by mass of coarse aggregate for glass fiber is 1%. We are going to compare the results of compression test as well as flexural strength to normal concrete through different( 1.5 and 1) percentages. Final results, the comparison of normal beam to addition of fiber reinforced concrete beam, the maximum flexural strength is found in addition of steel fiber in concrete beam.


2021 ◽  
Vol 40 (2) ◽  
pp. 177-185
Author(s):  
U.T. Igba ◽  
J.O. Akinyele ◽  
F.M. Alayaki ◽  
S.I. Kuye ◽  
S.O. Oyebisi

The effect of the sulphate attack on reinforced concrete structures in Lagos lagoon environment has become a concern for stakeholders in the construction industry. This study investigated the flexural strength and microstructure of reinforced concrete beams for a period of 365 days. Thirty beams with dimension 150 mm × 150 mm × 600 mm were cast using grade 30 concrete with water cement ratio of 0.45 and cured for 28, 90 and 365 days, in both lagoon and fresh water. Flexural strength and microstructural test were carried out. The result showed that the flexural strength of concrete submerged in fresh and lagoon water were 24.6 and 20.3 N/mm2 respectively. The microstructure also confirmed the fact that specimens submerged in the lagoon had more defects and deterioration than the sample cured in fresh water at 365 days.


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