what are the methods for compacting concrete in the field

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WHAT ARE THE METHODS FOR COMPACTING CONCRETE IN THE

08-05-2014  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

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Compaction of Concrete: Methods, Defects Precautions

Hand compaction (Rodding or Tamping): For smaller volumes of concrete for narrow columns and crowded sections, these methods are suitable. In this method, a tamping rod and steel rod of 10 to 16 mm with a bullet-nose or blunt-nose is used to compact the concrete by poking repeatedly into the concrete. Rodding should be done rapidly.

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Methods of Compaction of Concrete-Concrete Technology

09-11-2017  Methods of Concrete Compaction 1.Compaction by Hand The compaction of concrete by hand is done by using a standard tamping bar.By using standard tamping bar, we can distribute the concrete in a uniform manner along the cross-section of the mould.The number of tamping of strokes per layer varies with the type of concrete.

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Different Methods of Compaction of Concrete

09-01-2019  In mechanical compaction, vibrators are used. The vibrators can vibrate within the fresh concrete so that proper compaction occurs without any air voids. While compaction, the air bubbles in the concrete comes out at the top surface and it expells immediately.

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

Vibration Method of Concrete Compaction Vibration method is probably the most extensively used technique for compacting concrete. In this method, internal friction between aggregate particles is eliminated for a short time and concrete mixtures behave like

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Different Methods of Compaction of Concrete

09-01-2019  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

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Compaction of Concrete - Boral

Page 3 of 7 > compaction of concrete Table 1 Characteristics and applications of immersion vibrators Diameter Recommended Average Radius of Rate of concrete of head 2frequency1 3,5amplitude action placement 4,5 (mm) (Hz) (mm) (mm) (m3/h per vibrator) Application 20–40 150–250 0.4–0.8 75–150 1–4 High slump concrete in very thin

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Methods for Achieving and ... - Concrete Construction

01-08-1985  American Society for Testing and Materials (ASTM) standards describe several methods for measuring the dry density of an in-place soil. In the rubber balloon method (ASTM D 2167), water is used to find the volume of the hole and in the sand-cone method (ASTM D 1556) sand is used to find the volume. There is also a method for determining the in ...

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Chapter Five - Compaction, Quality Control, and Field ...

04-08-2021  As shown in the figure, a higher compac- Equipment/Test Parameter ASTM AASHTO Standard (D 698) Modified (D 1557) Standard T 99 Modified T 180 Mold diameter Method A: 101.6 mm Method B: 101.6 mm Method C: 152.4 mm Method A: 101.6 mm Method B: 152.4 mm Method C: 101.6 mm Method D: 152.4 mm Mold volume (cm3) 943.0 for 101.6-mm diameter mold 2,124 for

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4 TYPES OF VIBRATORS COMMONLY USED FOR CONCRETE COMPACTION ...

25-02-2020  The concrete is placed in molds installed on the platforms and securely clamped to the vibrating table, in order that mold and concrete vibrate in union. Vibrating tables are used for compacting stiff and harsh mixes utilized in precast structural individuals in

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Soil Compaction Equipment Concrete Construction Magazine

17-12-2012  The method, called the Proctor or Modified Proctor, establishes a maximum possible density for the compacted soil, as well as the optimum moisture content needed to achieve it. Most specs require the contractor to meet some percentage of the Proctor maximum density, usually 90 or 95 percent. Traditional compaction specifications often spelled ...

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3 METHODS OF DETERMINING WORKABILITY OF CONCRETE ...

29-10-2015  Different Test Methods for Workability Measurement Depending upon the water cement ratio in the concrete mix, the workability may be determined by the following three methods. Slump Test Compaction Factor Test Vee-bee Consistometer Test 1. Slump Test Suitability This method is suitable only for the concrete of high workability. This test is carried out with []

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Different Types of Soil Compaction Equipment: Types of ...

For machine operated rammers, the usual weight varies from 30kg to 10 tonnes (6 lbs to 22000 lbs). These hammers with 2- 3 tonnes (4400 to 6600 lbs)weights are allowed to free fall from a height of 1m to 2m (3ft to 7ft) on the soil for the compaction of rock fragments.

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Methods of Placing of Concrete for Various Situations ...

05-03-2019  Concrete is a vital material and plays a major role in the quality of buildings or structures. One may say that the making of concrete is easy but it’s not enough. It is important that a concrete mix is correctly designed, batched, mixed and transported, but it is also important to place concrete correctly.

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Underwater Concrete - an overview ScienceDirect Topics

Graham Tailor, in Advanced Concrete Technology, 2003. 11.3.5 Strength. With a high cement content, strengths of 50 MPa are readily achievable, although designers often feel they have to allow for weak bands in the concrete and assume strengths of around 30 MPa in their designs. As noted above, because underwater concrete is not mechanically compacted and there is an excess of water in the

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Methods for Achieving and ... - Concrete Construction

01-08-1985  American Society for Testing and Materials (ASTM) standards describe several methods for measuring the dry density of an in-place soil. In the rubber balloon method (ASTM D 2167), water is used to find the volume of the hole and in the sand-cone method (ASTM D 1556) sand is used to find the volume. There is also a method for determining the in ...

Get price

4 TYPES OF VIBRATORS COMMONLY USED FOR CONCRETE COMPACTION ...

25-02-2020  The concrete is placed in molds installed on the platforms and securely clamped to the vibrating table, in order that mold and concrete vibrate in union. Vibrating tables are used for compacting stiff and harsh mixes utilized in precast structural individuals in

Get price

Soil Compaction Equipment Concrete Construction Magazine

17-12-2012  The method, called the Proctor or Modified Proctor, establishes a maximum possible density for the compacted soil, as well as the optimum moisture content needed to achieve it. Most specs require the contractor to meet some percentage of the Proctor maximum density, usually 90 or 95 percent. Traditional compaction specifications often spelled ...

Get price

Concrete Batching, Mixing, Placing and Compaction of Concrete

18-03-2017  Methods of Compaction of concrete Vibration: To compact concrete you apply energy to it so that the mix becomes more fluid. Air trapped in it can then rise to the top and escape. As a result, the concrete becomes consolidated, and you are left with a good dense material that will, after proper curing, develop its full strength and durability.

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WRD HANDBOOK CHAPTER NO. 3 SELF COMPACTING CONCRETE

8.4 Test methods 36 8.5 37Basic mix proportioning 8.6 Mix proportioning methodology 40 8.7 Robustness of SCC 41 8.8 42Examples of SCC Mixes ... Self-compacting concrete is considered as a breakthrough in concrete technology due to its improved performance and working environment.

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3 METHODS OF DETERMINING WORKABILITY OF CONCRETE ...

29-10-2015  Different Test Methods for Workability Measurement Depending upon the water cement ratio in the concrete mix, the workability may be determined by the following three methods. Slump Test Compaction Factor Test Vee-bee Consistometer Test 1. Slump Test Suitability This method is suitable only for the concrete of high workability. This test is carried out with []

Get price

Self-Compacting Concrete Applications and Advantages

17-06-2019  Self-Compacting Concrete Uses . Self-compacting concrete has been used in bridges and even on pre-cast sections. One of the most remarkable projects built using self-compacting concrete is the Akashi-Kaikyo Suspension Bridge.In this project, the SCC was mixed on-site and pumped through a piping system to the specified point, located 200 meters away.

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Best Practices Guidelines for Self-Consolidating Concrete

compacting concrete, is able to flow and consolidate on its ... and Methods of Concrete Construction/Methods of Test and Standard Practices for Concrete. The CSA A23.1/.2 standard includes the basic and advanced test methods that can be ... o Column Segregation test.

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Concrete Pouring Steps and Techniques - Structural Guide

Concrete Pouring is varying from element to element. Let’s discuss the available methods to pour concrete. Column Concreting and Wall Concreting. Column concreting is done with the help of the tremie pipe or with the help of a pock make in the column formwork to avoid segregation of concrete

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Underwater Concrete - an overview ScienceDirect Topics

Graham Tailor, in Advanced Concrete Technology, 2003. 11.3.5 Strength. With a high cement content, strengths of 50 MPa are readily achievable, although designers often feel they have to allow for weak bands in the concrete and assume strengths of around 30 MPa in their designs. As noted above, because underwater concrete is not mechanically compacted and there is an excess of water in the

Get price
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