scholarly journals Effects of Incorporating Fiber Cocktail on Mechanical Properties of Concrete

2018 ◽  
Vol 203 ◽  
pp. 06011
Author(s):  
Saeed Ahmad ◽  
Ayub Elahi ◽  
Hafiz Waheed Iqbal ◽  
Faiza Mehmood
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Steel Fiber ◽  
Research Work ◽  
Polypropylene Fiber ◽  
Point Load ◽  
Strength Test ◽  
Load Test ◽  
Compressive Strength Test ◽  
Fiber Concrete

The objective of this research work was to determine the effect of fiber cocktail on mechanical properties of concrete. Three types of fibers were used namely monofilament polypropylene fiber, steel fiber and glass fiber. Steel and glass fiber were incorporated in concrete at different dosages while the content of Polypropylene fiber was kept constant. For this purpose, cubes (150×150×150mm) and prisms (101×101×508mm) were casted for compressive strength test on cubes and Two-Point load test on prisms. Eighteen different mixes were prepared such as control mix, single fiber concrete, double hybrid concrete and triple hybrid concrete. It was observed that both compressive and flexural strength increased with addition of single, double and triple fibers. However, the strengths of triple hybrid concrete were observed to be lesser as compared to single and double hybrid concrete.

scholarly journals Petrographic study and its implication to the uniaxial strength of weathered volcanic rocks from tawau, sabah

2014 ◽  
Vol 10 (3) ◽  
Author(s):  
Hennie Fitria W. Soehady Erfen ◽  
Baba Musta
Keyword(s):  
Volcanic Rocks ◽  
Point Load ◽  
Strength Test ◽  
Load Test ◽  
Secondary Minerals ◽  
Compressive Strength Test ◽  
Uniaxial Compressive Strength Test ◽  
Petrographic Study ◽  
Weathering Grades ◽  
Uniaxial Strength

This paper discussed the petrographic study and its effect to the uniaxial strength of weathered volcanic rocks from Tawau, Sabah, Malaysia. The volcanic rock consists of associated dacite, andesite and basalt rocks with the age of Pliocene to Quaternary. In this study the Murphy (1985) classification were used determine the weathering grade of volcanic rocks. The uniaxial strength value were used the Point Load Test and Uniaxial Compressive Strength test. The microstructures and identification of altered minerals were analysed using scanning electron microscope (SEM) and polarized microscope, respectively. The result of analysis indicated that the uniaxial strength of volcanic rocks decreased with the degree of weathering grades where the uniaxial strength decreased from 122.2 to 15.8 MPa for dacite, 143.4 to 10.1 MPa for basalt and 181.2 to 26.8 MPa for andesite. This result is due to the different percentages of quartz and feldspar minerals in the rock samples as well as formation of secondary minerals in weathered rocks.  Microstructures study showed the appearance of micro fractures with narrow apertures in the minerals also influenced the uniaxial strength of the rocks.________________________________________GRAPHICAL ABSTRACT

scholarly journals PEMANFAATAN LIMBAH BUBUT BESI PADA BETON SERAT DITINJAU DARI KUAT TEKAN DAN KUAT LENTUR

2020 ◽  
Vol 13 (2) ◽  
pp. 93
Author(s):  
Ikrar Hanggara, ST., MT
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Steel Fiber ◽  
Strength Test ◽  
Fine Aggregate ◽  
Flexure Strength ◽  
Compressive Strength Test ◽  
Fiber Concrete ◽  
Engineering State ◽  
The Cost

The practice of steel lathing by students of Mechanical Engineering State Polytechnic of Malang produces an abundant amount of steel fiber waste. In this research steel fiber was utilized to substitute coarse aggregate in fiber concrete mixture. The purpose of this research is to find out the compressive and flexure strengths of fiber concrete carried out at Material Laboratory Civil Engineering Politeknik Negeri Malang, and to estimate the cost. The required data were of the results of coarse aggregate and fine aggregate tests, and physical cutting of steel lathing waste. Mix design concrete referred to SNI 03-2834-2000. Compressive strength test used 54 cylindrical specimens of Ø15 x 30cm varied at 0%, 5%, and 10% substitutions. Tests were carried out on concrete aged 7, 14, and 28 days. The flexural strength test used 6 beam specimens of 15 x 15 x 60cm varied at 0%, 5%, and 10% substitution. Tests were carried out on 28 days of concrete. The experiment resulted in 39.01 Mpa  compressive strength at 0% variation; 24.54  Mpa  compressive strength at 5% variation; 21.80 Mpa  compressive strength at 10% variation; in 3.87 Mpa  flexure strength at 0% substitution; 4.27 Mpa  flexure strength at 5% substitution; 4.07 Mpa  flexure strength at 10% substitution. The greatest result of flexure strength test occured at 5% variation; at Rp.940,276/m3 at 0% variation and at Rp.938,719/m3 at 5% variation or 0.2 % decrease. Key word : Steel lathe waste, compressive strength, flexure strength

Mechanical Properties of Fiber Reinforced Lightweight Aggregate Concrete

2011 ◽  
Vol 477 ◽  
pp. 274-279 ◽  
Author(s):  
Yi Xu ◽  
Lin Hua Jiang ◽  
Hong Qiang Chu ◽  
Lei Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Water Hyacinth ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
Lightweight Aggregate ◽  
Splitting Tensile Strength ◽  
Lightweight Aggregate Concrete ◽  
Fiber Types

In this study, the effects of fiber types on the mechanical properties of lightweight aggregate concretes were investigated. Three types of fibers, namely, polypropylene fiber, steel fiber and water hyacinth (Eichhornia crassipes) fiber, and two types of lightweight aggregates, namely, expanded polystyrene and ceramsite were used. The compressive strength and splitting tensile strength of concretes were tested. The results show that both the compressive strength and the splitting tensile strength were improved by adding a reasonable volume of steel fiber and polypropylene fiber into LWAC. The addition of water hyacinth fiber had little effect on the compressive strength of LWAC, while a little increase was observed in the splitting tensile strength.

scholarly journals Effect of Mound Soil on Concrete Produced with River Sand

2014 ◽  
Vol 2 (1) ◽  
pp. 75-82
Author(s):  
Elivs M. Mbadike ◽  
N.N Osadebe
Keyword(s):  
Compressive Strength ◽  
Research Work ◽  
Strength Test ◽  
Control Test ◽  
River Sand ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Compressive Strength Test ◽  
Average Compressive Strength

In this research work, the effect of mound soil on concrete produced with river sand was investigated. A mixed proportion of 1.1.8:3.7 with water cement ratio of 0.47 were used. The percentage replacement of river sand with mound soil is 0%, 5%, 10%, 20%, 30% and 40%. Concrete cubes of 150mm x 150mm x150mm of river sand/mound soil were cast and cured at 3, 7, 28, 60 and 90 days respectively. At the end of each hydration period, the three cubes for each hydration period were crushed and their average compressive strength recorded. A total of ninety (90) concrete cubes were cast. The result of the compressive strength test for 5- 40% replacement of river sand with mound soil ranges from 24.00 -42.58N/mm2 a against 23.29-36.08N/mm2 for the control test (0% replacement).The workability of concrete produced with 5- 40% replacement of river sand with mound soil ranges from 47- 62mm as against 70mm for the control test.

The Effect of Different Curing Conditions on Compressive Strength of Concrete

2017 ◽  
Vol 60 (3) ◽  
pp. 147-153
Author(s):  
Muhammad Arslan ◽  
Muhammad Asif Saleem ◽  
Maria Yaqub ◽  
Muhammad Saleem Khan
Keyword(s):  
Compressive Strength ◽  
Research Work ◽  
Concrete Structures ◽  
Strength Test ◽  
The Other ◽  
Cylindrical Shape ◽  
Curing Conditions ◽  
Compressive Strength Test ◽  
Different Types ◽  
Compressive Strength Of Concrete

The focus of this research work was to analyse the effect of different types of curing oncompressive strength of concrete structures. For this purpose, 54 test specimens of cylindrical shape wereprepared. These specimens were cured with different methods and were tested on different age days toanalyse the effect of curing on compressive strength. Test specimens cured with conventional water curingmethod gives the highest results as compared to the other adopted methods.

scholarly journals Mechanical properties of Hybrid steel/PVA fibers reinforced high strength concrete

2018 ◽  
Vol 199 ◽  
pp. 11005 ◽  
Author(s):  
Wasim Abbass ◽  
M. Iqbal Khan
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
Research Work ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Strength Concrete ◽  
Flexural Performance ◽  
Micro Level

The high strength concrete exhibits improved compressive strength with drawback of brittle failure due to lack of tensile strength which can be catered by the addition of fibers. The efficient use of fibers with hybridization at macro and micro level can improve mechanical properties of high strength concrete. The effect of hybridization of hooked end steel macro fibers (60 mm) and PVA micro fibers (12 mm) with different dosages was investigated in this research work. The different percentage of steel and PVA were hybridized to find out the best combination of hybridized fibers in high strength concrete. The compressive and flexural properties of high strength concrete along with complete load vs deflection behaviour of hybrid fiber reinforced concrete were investigated. The results revealed that hybridization of macro and micro fibers provided better improvement in flexural performance. It was observed from the results that the hybrid combination of fibers of 1% macro steel fiber and 0.15% micro PVA fibers proved to be the best for enhancement in flexural performance of high strength concrete.

Mechanical Properties of Polypropylene Fiber Concrete after High Temperature

2014 ◽  
Vol 662 ◽  
pp. 24-28 ◽  
Author(s):  
Xi Du ◽  
You Liang Chen ◽  
Yu Chen Li ◽  
Da Xiang Nie ◽  
Ji Huang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Polypropylene Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Fiber Concrete ◽  
Compressive Strength Of Concrete ◽  
Polypropylene Fiber Reinforced Concrete

With cooling tests on polypropylene fiber reinforced concrete and plain concrete that were initially subjected to different heating temperatures, the change of mechanical properties including mass loss, uniaxial compressive strength and microstructure were analyzed. The results show that the compressive strength of concrete tend to decrease with an increase in temperature. After experiencing high temperatures, the internal fibers of the polypropylene fiber reinforced concrete melted and left a large number of voids in it, thereby deteriorating the mechanical properties of concrete.

Study on Performance about Hybrid Fiber Concrete of Airport Pavement

2014 ◽  
Vol 1065-1069 ◽  
pp. 706-709 ◽  
Author(s):  
Xiao Jun Liu ◽  
Che Fei Zhu ◽  
Yong Gen Wu ◽  
Qing Tao Liu
Keyword(s):  
Mechanical Properties ◽  
Steel Fiber ◽  
Volume Fraction ◽  
Orthogonal Experiment ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Airport Pavement ◽  
Fiber Concrete ◽  
Pavement Concrete

In order to meet the requirements of the use of aircraft, improve mechanical properties of pavement concrete, the steel fiber mixed basalt hybrid fiber reinforced concrete technical route was proposed, by using the method of orthogonal experiment, steel fiber with 1.2%,1.5%,1.8% these 3 volume fraction and basalt fiber in 0.05%,0.1%,0.15% these 3 volume fraction mixed, research the rules of its effect on the performance of airport pavement concrete.

Low Strength Self Compacting Concrete Compressive Strength Test

2013 ◽  
Vol 275-277 ◽  
pp. 2041-2044
Author(s):  
Feng Yan ◽  
Nan Pang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Compression Strength ◽  
Strength Test ◽  
The Self ◽  
Concrete Compressive Strength ◽  
Self Compacting Concrete ◽  
Intensity Index ◽  
Compressive Strength Test ◽  
Low Strength

In this paper,the mechanical properties were studied,the self compacting concrete cubic compression strength,prismatic compressive strength test,discussed two kinds of relationship between intensity index.

Experimental Study on Axial Tensile Strength of Low Volume Fraction of Ternary Hybrid Fiber Reinforced Concrete

2014 ◽  
Vol 906 ◽  
pp. 329-334
Author(s):  
Yu Ting Zhu ◽  
Dong Tao Xia ◽  
Bo Ru Zhou
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
Strength Test ◽  
Splitting Tensile Strength ◽  
National Standard ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Advantages And Disadvantages

In this paper, according to the national standard and testing methods,the direct tension strength,splitting tensile strength and cubic compressive strength test were carried out for 8 different groups of hybrid fiber (containing steel fiber, macro-polypropylene fiber and dura fiber) reinforced HPC specimens.The results showed that when the volume proportion of ternary hybrid fiber was less than 1%, there was not obvious influence for the concrete compressive strength, but the splitting tensile strength increased by 26% ~ 69%; the ratio between splitting tensile strength and compressive strength for HFRC increased to 1/12~1/9. When added 0.7% steel fiber, 0.19% macro-polypropylene fiber and 0.11% dura fiber, the confounding effect was the best. Based on the advantages and disadvantages of tensile splitting strength and direct tensile strength test and the results of tests, the concept of equivalent tensile strength and calculative formula was put forward .

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