influence of different compacting methods on concrete

Influence of different compacting methods on concrete ...

Adequate compacting is an important stage contributing for the durability and final quality of concrete structures. The two main ways of compacting concrete are: manual and mechanical (immersion vibrator). This paper has the goal of verifying the influence of those two compacting methods on the compressive strength of concrete from long term data.

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Influence of different compacting methods on concrete ...

Adequate compacting is an important stage contributing for the durability and final quality of concrete struc-tures. The two main ways of compacting concrete are: manual and mechanical (immersion vibrator). This paper has the goal of verifying the influence of those two compacting methods on the compressive strength of concrete from long term data.

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Influence of different compacting methods on concrete ...

In order to do that, cylindrical test specimens of a same concrete were molded with different compacting methods and the compressive strength was investigated at 1, 3

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Influence of different compacting methods on concrete ...

This paper has the goal of verifying the influence of those two compacting methods on the compressive strength of concrete from long term data. In order to do that, cylindrical test specimens of a same concrete were molded with different compacting methods and the compressive strength was investigated at 1, 3 , 7, 14, 21, 28, 63, 91, 180, 365 ...

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Different Methods of Compaction of Concrete

Jan 09, 2019  The different types of hand compaction of concrete are given below. a.Rodding. Rodding is a method of poking concrete with a rod. The rod used for poking has a length of 2m and 16mm diameter. The thickness of layers of poking varies from 15 to 20mm. b.Tamping.

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Influence of different compacting methods on concrete ...

This paper has the goal of verifying the influence of those two compacting methods on the compressive strength of concrete from long term data. In order to do that, cylindrical test specimens of a same concrete were molded with different compacting methods and the compressive strength was investigated at 1, 3 , 7, 14, 21, 28, 63, 91, 180, 365 ...

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Influence of concrete compaction on the strength of ...

Jun 01, 2003  Tests on 35 concrete-filled steel RHS columns to investigate the influence of concrete compaction methods on the member capacities of the composite columns are reported. The main parameters varied in the tests are: (1) column section depth-to-width ratio, from 1.0 to 2.0, (2) tube depth to thickness ratio, from 34 to 136, (3) load eccentricity ...

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Compaction of Concrete- Methods and Results of Poor ...

Different types of mechanical compaction methods are explained in the following paragraphs: 1. Shock or drop table. Shock or drop table is used to consolidate extremely stiff low slump concrete in making precast units. 2. Centrifugation. It is employed for compacting moderate to high slump mixtures in constructing poles, pipes, and piles.

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WHAT ARE THE METHODS FOR COMPACTING CONCRETE IN THE FIELD ...

May 08, 2014  The various methods of hand compaction are as given below. 1. Rodding. It is a method of poking with 2m long, 16 mm dia rod at sharp corners and edges. The thickness of layers for rodding should be 15 to 20 cm. 2. Ramming. It is generally used for compaction on ground in plain concrete. It is not used either in RCC or on upper floors.

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Influence of concrete compaction on the strength of ...

Abstract Concrete-filled steel tubular columns have better structural performance than that of bare steel or reinforced concrete (R.C.). The use of concrete-filled SHS (Square Hollow Section) and RHS (Rectangular Hollow Section) have become widespread in the past few decades. However, these members are susceptible to the influence of concrete compaction.

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Compaction of Concrete: Methods, Defects Precautions

1. Selection of the correct method of compaction according to the situation. 2. Avoiding segregation of concrete. 3. Avoid bleeding of concrete due to over compaction. 4. To see that the concrete uniformly reaches all the nooks and corners of the formwork and reinforcement. 5.

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Compaction of Concrete: Voids and Methods Concrete ...

For compacting the base coarse the tamper should be recessed near the ends by 2.5 cms as shown in Fig. 11.2. The concrete is placed in the form, so that it is deeper than the side forms and the tamper is bumped up and down on the top surface of the concrete. By this actin concrete

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Methods of Concrete Compaction and Types of Vibrators

Sep 24, 2018  It is done with the wooden cross beam (generally size of beam is about 10 x 10 cm). 02. Concrete Compaction by Pressure and Jolting. This compaction method is used for compacting hollow blocks, cavity blocks, concrete blocks. In this method, the stiff concrete

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(PDF) Influence of self-compacting concrete fresh ...

Influence of self-compacting concrete fresh properties on bond to reinforcement. Materials and Structures, 2014. HENRIETTE SZILAGYI

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EP0183681A2 - Method of compacting concrete - Google Patents

Methods for fabrication of concrete elements by using. different types of molds are known in prior art. The molds are generally fabricated of steel, wood, concrete, or some other stiff plate material. The molds are dimensioned to withstand the casting pressure during concrete pouring and compaction without appreciable deformation.

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(PDF) Influence of Fine Aggregate Types on the Performance ...

Influence of Fine Aggregate Types on the Performance of Self - Compacting Concrete March 2016 Engineer - Journal of the Institution of Engineers, Sri Lanka 49(1):9

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Concrete placing compacting and finishing - CITB

Apr 17, 2019  CITB has developed this standard in discussion with industry. Duration. Minimum 1 day of 6 learning hours. Purpose/Scope. This training standard is designed to familiarise with different methods of concrete transport and placing methods, best practice in compacting and finishing, and the influence of concrete mix design.

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Concrete Mixing Methods and Concrete Mixers: State of the Art

Apr 01, 2001  2.1.2 Pan Mixers . All pan mixers work on basically the same principle []: a cylindrical pan (fixed or rotating) contains the concrete to be mixed, while one or two sets of blades rotate inside the pan to mix the materials and a blade scrapes the wall of the pan.The shapes of the blades and the axes of rotation vary. Figure 4 shows the different combinations of blade configurations and pan.

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TESTING METHODS OF CONCRETE - KPSTRUCTURES

Oct 27, 2020  Electrical resistivity methods have been used to find out the thickness of concrete pavements. The method is based on the principle that the materials offer resistance to the passage of an electric current. Concrete pavement has a resistivity characteristic that is different from that of the underlying subgrade layers.

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Different methods of Compaction of concrete – we civil ...

May 19, 2018  1. Rodding :-. It is a method of poking with 2m long, 16 mm diameter rod at sharp corners and edges. The thickness of layers for rodding should be 15 to 20 cm. A piece of bamboo maybe used for rodding the concrete. 2. Ramming:-. It is generally used for compaction on ground in plain concrete.

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SELF-COMPACTING CONCRETE: STUDY OF INFLUENCE OF DIFFERENT ...

PDF The Self-compacting concrete (SCC) is one of the greatest advances in concrete technology. When compared to conventional concrete, its production... Find, read and cite all the research ...

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(PDF) Influence of self-compacting concrete fresh ...

Influence of self-compacting concrete fresh properties on bond to reinforcement. Materials and Structures, 2014. HENRIETTE SZILAGYI

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Influence of Concrete Compaction on the Behavior of ...

Apr 01, 2001  The main objectives of these tests were twofold: firstly, to report a series of tests on composite stub columns under different concrete compaction methods; and secondly, to investigate the influence of concrete compaction on the section capacities and the modulus of elastic of concrete filled steel tubes with rectangular sections.

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Influence of self-compacting concrete fresh properties on ...

Mar 08, 2014  The paper presents a study on the influence of the fresh state behaviour of powder-type self-compacting concrete on the hardened properties when the formwork is filled by pumping from the bottom of the elements. More precisely the possible influence on concrete’s bond to reinforcement is investigated. For this purpose concretes classified in two different slump flow classes have been tested.

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EP0183681A2 - Method of compacting concrete - Google Patents

Methods for fabrication of concrete elements by using. different types of molds are known in prior art. The molds are generally fabricated of steel, wood, concrete, or some other stiff plate material. The molds are dimensioned to withstand the casting pressure during concrete pouring and compaction without appreciable deformation.

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Influence of Magnetic Water on Self-compacting Concrete ...

Jul 09, 2019  This self consolidating concrete can be densely filled into every corner of a formwork, totally by means of its own weight without the need for vibrations to compaction for improving the self compacting concrete properties with low cost by using magnetic water. However, the price and expenses of this method is not comparable with their advantages.

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What are the different methods to compact concrete? - Quora

Compaction of Concrete is an operation in which fresh concrete is compacted in forms and make it encircle reinforcements and other embedded objects such as tubes in the mold. There are various problems that might arise if compaction of concrete is...

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Different Test Methods For Workability of Self Compacting ...

Test Methods For Workability of Self Compacting Concrete 1. Slump Flow T50cm Test The slump flow test is done to assess the horizontal flow of concrete in the absence of obstructions. It is the most commonly used test and gives a good assessment of filling ability. It can be used at the site, the test also indicates the resistance to segregation.

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TESTING METHODS OF CONCRETE - KPSTRUCTURES

Oct 27, 2020  Electrical resistivity methods have been used to find out the thickness of concrete pavements. The method is based on the principle that the materials offer resistance to the passage of an electric current. Concrete pavement has a resistivity characteristic that is different from that of the underlying subgrade layers.

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Laboratory Methods for Assessing the Influence of Improper ...

Compaction index is one of the most important technological parameters during asphalt pavement construction which may be negatively affected by wrong asphalt paving machine set, weather conditions, or the mix temperature. Presented laboratory study analyzes the asphalt mix properties in case of inappropriate compaction. The reference mix was designed for AC 11 S wearing layer (asphalt concrete ...

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Influence of different curing conditions and water to ...

According to the results, by decreasing the W/C ratio, the amount of electrical resistance of samples increases and for high W/C ratio the influence of curing methods on this parameter is clearly. The microstructural observations confirm the results described above. KW - Curing condition. KW - Durability. KW - EDS. KW - Self-compacting concrete

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Quantitative statistical analysis of the crack propagation ...

Apr 14, 2021  In this study, acoustic emission (AE) was used to monitor the whole process of tensile and fracture of the self‐compacting rubber concrete (SCRC) under four‐point bending. The AE activities of SCRC during the stretching and fracture process were analyzed by statistical methods to correlate the process of crack propagation with changes in ...

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(PDF) Effect of Marshall and Gyratory Compaction Methods ...

This study is aimed to find the aggregates #8 23-35 29 71 71-57.5 = segregation in asphalt samples prepared by Gyratory 13.5% compaction and Marshall compaction methods using image # 50 5-12 8.5 91.5 91.5-71 = analysis through Image J software and to relate the 20.5% segregation graphs of the two compaction methods with the # 200 2-8 5 95 95-91 ...

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