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مرکز اطلاعات علمی SID1
اسکوپوس
مرکز اطلاعات علمی SID
ریسرچگیت
strs
Author(s): 

GANESAN N. | INDIRA P.V.

Issue Info: 
  • Year: 

    2006
  • Volume: 

    80
  • Issue: 

    12
  • Pages: 

    8-15
Measures: 
  • Citations: 

    400
  • Views: 

    9943
  • Downloads: 

    18003
Keywords: 
Abstract: 

Yearly Impact:

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Issue Info: 
  • Year: 

    2020
  • Volume: 

    6
  • Issue: 

    Special Issue 4 (29)
  • Pages: 

    5-26
Measures: 
  • Citations: 

    0
  • Views: 

    266
  • Downloads: 

    126
Abstract: 

Fiber concretes are a new type of composite material in the manufacturing industry, due to lack of information, identification behavioral characteristics requires laboratory studies. In this research, the bending behavior one layer and multi-layer slabs made with high performance self-compacting concrete reinforced by steel and plastic fibers has been studied. The slabs made in this study differ from 10 models, 4 models one layer and 6 models with three layers make-up, in which the type and volume the fibers vary in layers. Two sample were made from each model and a total 20 slab samples with dimensions 40  40  7. 5 cm the three-point bending test slab were performed, in order to evaluate the effect adding steel and plastic fibers and their layout on the bending behavior of the slabs. The results showed that the steel fibers can significantly improve the bending behavior of the slabs, so that, after the first cracking crack, the cracking was done on the cracks and its extension was prevented, the creep behavior the unbleached concrete slabs They have increased their bending strength and ductility considerably. If plastic fibers were much less effective than steel fibers. The flexural behavior three-layer slabs with a fixed volume fibers distributed in such a way that the percentage fibers in the outer layers is more than the middle layer, improved compared to single-layer slabs, which can be due to an increase in the percentage fibers In the outer layers, because these layers are more tense than the middle layer.

Yearly Impact:

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    15
  • Issue: 

    3
  • Pages: 

    421-433
Measures: 
  • Citations: 

    0
  • Views: 

    51356
  • Downloads: 

    22380
Abstract: 

The development of self-compacting concrete marks an important mile stone in improving the product quality and efficiency of building industry. SCC homogeneously spreads due to its own weight, without any additional compaction energy and does not entrap air. The required flowability is achieved by using more fines (cement+filler) and reducing coarse aggregate content. The present research work was aimed to develop SCC by using Lime stone quarry fines and fly ash as filler and to study its effect on abrasion resistance of Self- Compacting concrete. The test results indicate that the SCC mixes with lime stone quarry fines and fly ash significantly improved the depth of wear, compressive strength, tensile strength and flexural strength.

Yearly Impact:

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گارگاه ها آموزشی
Author(s): 

HABIBI A.R. | AHMADVAND H.

Issue Info: 
  • Year: 

    2018
  • Volume: 

    31
  • Issue: 

    2 (22)
  • Pages: 

    101-116
Measures: 
  • Citations: 

    0
  • Views: 

    907
  • Downloads: 

    407
Abstract: 

self-compacting concrete is one of the most widely used concrete in the past two decades. The objective of present study is to introduce a new method for high strength self-compacting concrete mix design to both achieving maximum compressive strength and minimizing the cost of concrete. The proposed method is an analytical method. In this method, using optimization concepts such as Lagrangian function and Kuhn– Tucker conditions, and introducing a specific relationship to the compressive strength of concrete, without the need for computer computations, and based on a completely analytical method, provides optimal concrete mix design. The proposed method is a general approach and is applicable to all types of concrete. Here, for the purpose of introducing, the method used to high strength self-compacting concrete containing fly ash. An optimization model of the concrete mix design is first developed accounting for effects of experimental results. Then, using an optimization algorithm, optimal concrete mix design is obtained for the concrete with the strength under consideration. Results showed that the proposed method can provide optimal mix design of high-strength self-compacting concrete while water and cement amount are the minimum amounts required for selfcompacting concrete.

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Author(s): 

DALVAND A. | HATAMI H. | S.Chegini A.

Issue Info: 
  • Year: 

    2021
  • Volume: 

    8
  • Issue: 

    1
  • Pages: 

    131-151
Measures: 
  • Citations: 

    0
  • Views: 

    129
  • Downloads: 

    160
Abstract: 

The nature of dynamic loading is different due to the high force in a few milliseconds with static loading. The amount of energy absorption and energy loss in composite materials is a suitable measurement to evaluate the performance against impact loads. On the other hand, the use of selfcompacting composites due to its unique properties has attracted the attention of researchers. High compressive and tensile strength, high flexural strength, has attracted more attention from researchers to this kind of cement composites. In this research, in the form of a comprehensive laboratory work, using four basement mixing designs, 64 rectangular composite panels were constructed in two groups of 100*100 mm with four thicknesses of 30, 45, 60 and 75 mm and tested under dynamic loading. Tensile and flexural strength tests were made on all four mixing designs. Steel fibers with percentages of 0, 0. 25, 0. 5 and 0. 75 with length of 25 mm were used for the construction of cement composites. The drop hammer test machine with weighs 180 kg and the power of 7500 J is used. According to laboratory results, the combined use of steel and fiber reinforced steel sheets increased the energy absorption considerably. Also, the initial peak force increased and the deformation length decreased.

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