machine mixing and slump of cement concrete civil

Machine mixing and slump of cement concrete - Civil ...

Mar 18, 2017  For example, for concrete of ratio 1:2:4 first four boxes of stone ballast, then two boxes of sand and then one bag of cement should be put into the cement concrete mixer. The machine then revolve to mix dry materials. Then water should be added to the required quantity, 25 to 30 litres (5 to 6) gallons per bag of cement to have the required ...

get price

Mixing and Transporting Concrete

This can vary from hand to machine mixing, with machine mixing being the most common. However, no successful mixture can be achieved without the proper batching of all materials. Batching is the "process of weighing or volumetrically measuring and introducing into the mixer the ingredients for a batch of concrete" (Kosmatka, 94).

get price

(PDF) CONCRETE MIX SLUMP AND COMPRESSION TEST JOHN

APPARATUS CONCRETE MIXING Concrete mixer Wheel barrows Buckets Shovels Sand PPC cement 19mm aggregate Water Concrete cube Curing bath (25°C) CONCRETE SLUMP TEST Slump cone Scale measurement Tamping steel rod CONCRETE COMPRESSION TEST Concrete cubes Compressive machine 5 PROCEDURE CONCRETE MIXING For strength requirements, the cement,

get price

STUDY ON SLUMP RETENTION OF READY-MIX CONCRETE: A

3. SLUMP LOSS IN CONCRETE Slump loss is the rapid stiffening of fresh concrete. When admixtures like super plasticizers are used with Portland cement, slump loss become significant. Stiffening of concrete gets accelerated under hot climate. It is due to evaporation of mixing water, hydration of cement and even by the

get price

Civil Engineering Practice Archives Civil Engineering Terms

Sep 24, 2017  Machine mixing of cement concrete Following points must be kept in mind for machine mixing of cement concrete. Stone ballast, sand and cement to be pour into the cement concrete mixer. For example, for concrete of ratio 1:2:4 first four boxes of stone ballast, then two boxes of sand and then one bag of cement should be put into the cement ...

get price

Concrete Mix Attributes, Instructions and Slumps

Mar 19, 2019  Workability: The concrete mix workability is the property that determines the mix capacity to be placed and consolidate properly, allowing to finish a product without segregation. Consistency: This property determines the mobility and slump of the concrete mix. This characteristic is measured in terms of slump, the higher slump values, the more manageable, and greater mobility

get price

No slump concrete - Civil/Environmental engineering ...

Feb 18, 2020  No slump concrete. I am working on a site where they are using a concrete mix of 1 cement 1.5 sand 3 aggregate and water:cement ratio of 0.4. The mix is workable enough for columns, slabs etc when vibrated with a poker and the visible quality is good. It is achieving 20N/mm2 and 24N/mm2 for 3- and 7-day stengths with a target strength of 35N/mm2.

get price

(PDF) CONCRETE MIX SLUMP AND COMPRESSION TEST JOHN

APPARATUS CONCRETE MIXING Concrete mixer Wheel barrows Buckets Shovels Sand PPC cement 19mm aggregate Water Concrete cube Curing bath (25°C) CONCRETE SLUMP TEST Slump cone Scale measurement Tamping steel rod CONCRETE COMPRESSION TEST Concrete cubes Compressive machine 5 PROCEDURE CONCRETE MIXING For strength requirements, the cement,

get price

STUDY ON SLUMP RETENTION OF READY-MIX CONCRETE: A

3. SLUMP LOSS IN CONCRETE Slump loss is the rapid stiffening of fresh concrete. When admixtures like super plasticizers are used with Portland cement, slump loss become significant. Stiffening of concrete gets accelerated under hot climate. It is due to evaporation of mixing water, hydration of cement and even by the

get price

Improving Portland Cement Concrete Mix Consistency and ...

IMPROVING PORTLAND CEMENT CONCRETE MIX CONSISTENCY AND PRODUCTION RATE THROUGH TWO-STAGE MIXING Final Report September 2007 Principal Investigator Vernon R. Schaefer Professor of Civil, Construction, and Environmental Engineering Iowa State University

get price

What is concrete slump test? step-by ... - Civil Engineering

Concrete Slump Test Procedure. Step 1. Firstly, the internal surface of the mould is cleaned carefully. Oil can be applied on the surface. Step 2. The mould is then placed on a base plate. The base plate should be clean, smooth, horizontal and non-porous. Step 3. The mould is filled with fresh concrete

get price

Cement Concrete Specification for Design Mix 1:2:4 - Civil ...

Jun 16, 2019  In machine mixing for the proportion of 1:2:4 first of all 2 boxes of sand are dumped into the cement concrete mixer then one bag of cement and four boxes of aggregates are gradually added and rotated for dry mix to obtain required colour and then required quantity of

get price

Stage of concrete production - TopCivilEngineering

Mar 26, 2020  In hand mixing of concrete we add 10% extra cement. Fine and coarse aggregate spread over floor in alternate layers and after that cement add. Well mix this by the help of shovel to obtain desire uniform colour obtained. Machine mixing :- Mixing of cement, fine and coarse aggregate and water by the help of mixing machine. At site we used drum ...

get price

Civil Engineering Practice Archives Civil Engineering Terms

Mar 18, 2017  Machine mixing of cement concrete Following points must be kept in mind for machine mixing of cement concrete. Stone ballast, sand and cement to be pour into the cement concrete mixer. For example, for concrete of ratio 1:2:4 first four boxes of stone ballast, then two boxes of sand and then one bag of cement should be put into the cement ...

get price

Effect of Sand Fines and Water/Cement Ratio on Concrete ...

Figure 2: Test of Concrete Workability (Slump). The amount of various materials needed for each mix proportion which could cast 9 cubes and 3 cylinders were batched for concrete mixing (Table 1). Different batches of concrete consisting sand with fines content of 2%, 4%, 6%, 8%, 10% and 12% with three constant water/cement ratios of

get price

Quality Control Of Concrete Construction - DAILY CIVIL

Approximately 15 to 20 revolutions of mixture machine are recommended to give them a proper mix. It should be taken care that segregation should not take place. Slump test shall be conducted after every 25 m3 of concreting done, to ensure the perfect workability of concrete.

get price

Concrete Slump Test - Experiment Procedure [Civilology]

Procedure to do the slump test. The Inner surface of the cone should be free from dust moisture. Apply one coat of oil inside. Ensure the place is smooth and horizontal where you going to place the cone. First, fill up the cone with concrete 1/4th of the height. Tamp the concrete

get price

Manufacturing process of concrete (for civil engineering)

Feb 11, 2018  Machine mixing For reinforced concrete work and for medium/large scale mass concrete work mixing of concrete should be done in machine. Machine mixing is efficient and also economical when the quality of concrete to be produced is large. Based on discharge method machine mixing are of two type - Tilting mixer Non-tilting mixer 11.

get price

Placing and Compaction of Cement Concrete - The Civil Sutras

Stiff mixes contain far more air than workable ones. That is one of the reasons why a low-slump concrete requires more compactive effort than one with a higher slump – the compaction needs to continue for a longer time, or more equipment has to be used. Even air-entrained concrete needs to be compacted to get rid of entrapped air voids.

get price

UCI Machine Learning Repository: Concrete Slump Test Data Set

Concrete Slump Test Data Set Download: Data Folder, Data Set Description. Abstract: Concrete is a highly complex material.The slump flow of concrete is not only determined by the water content, but that is also influenced by other concrete ingredients.

get price

STUDY ON SLUMP RETENTION OF READY-MIX CONCRETE: A

3. SLUMP LOSS IN CONCRETE Slump loss is the rapid stiffening of fresh concrete. When admixtures like super plasticizers are used with Portland cement, slump loss become significant. Stiffening of concrete gets accelerated under hot climate. It is due to evaporation of mixing water, hydration of cement and even by the

get price

Improving Portland Cement Concrete Mix Consistency and ...

IMPROVING PORTLAND CEMENT CONCRETE MIX CONSISTENCY AND PRODUCTION RATE THROUGH TWO-STAGE MIXING Final Report September 2007 Principal Investigator Vernon R. Schaefer Professor of Civil, Construction, and Environmental Engineering Iowa State University

get price

Cement Concrete Specification for Design Mix 1:2:4 - Civil ...

Jun 16, 2019  In machine mixing for the proportion of 1:2:4 first of all 2 boxes of sand are dumped into the cement concrete mixer then one bag of cement and four boxes of aggregates are gradually added and rotated for dry mix to obtain required colour and then required quantity of

get price

UCI Machine Learning Repository: Concrete Slump Test Data Set

Concrete Slump Test Data Set Download: Data Folder, Data Set Description. Abstract: Concrete is a highly complex material.The slump flow of concrete is not only determined by the water content, but that is also influenced by other concrete ingredients.

get price

Manufacturing process of concrete (for civil engineering)

Feb 11, 2018  Machine mixing For reinforced concrete work and for medium/large scale mass concrete work mixing of concrete should be done in machine. Machine mixing is efficient and also economical when the quality of concrete to be produced is large. Based on discharge method machine mixing are of two type - Tilting mixer Non-tilting mixer 11.

get price

Mix Design of Concrete – CIVIL TECH

May 30, 2018  Introduction The process of selecting suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required, strength, durability, and workability as economically as possible, is termed the concrete mix design. The concrete mix design involves various steps, calculations and laboratory testing to find right mix proportions.

get price

Effect of Sand Fines and Water/Cement Ratio on Concrete ...

Figure 2: Test of Concrete Workability (Slump). The amount of various materials needed for each mix proportion which could cast 9 cubes and 3 cylinders were batched for concrete mixing (Table 1). Different batches of concrete consisting sand with fines content of 2%, 4%, 6%, 8%, 10% and 12% with three constant water/cement ratios of

get price

Quality Control Of Concrete Construction - DAILY CIVIL

Approximately 15 to 20 revolutions of mixture machine are recommended to give them a proper mix. It should be taken care that segregation should not take place. Slump test shall be conducted after every 25 m3 of concreting done, to ensure the perfect workability of concrete.

get price

GRADE OF CONCRETE AND CONCRETE MIX DESIGN

Aug 02, 2020  The proportions of concrete components such as cement , sand, aggregates , and water are the concrete mix ratios. These mixing ratios are decided on the basis of construction type and mixing designs. This is required for concrete mix design and to know about strength of concrete as per its design ratio. As a civil engineers its very important ...

get price

Placing and Compaction of Cement Concrete - The Civil Sutras

Stiff mixes contain far more air than workable ones. That is one of the reasons why a low-slump concrete requires more compactive effort than one with a higher slump – the compaction needs to continue for a longer time, or more equipment has to be used. Even air-entrained concrete needs to be compacted to get rid of entrapped air voids.

get price

How to Carry Out Concrete Mix Design - Structville

Aug 10, 2017  Concrete mix design is the process of specifying and proportioning the quantity of concrete ingredients (cement, sand, gravel, and water) required to produce concrete with a specified fresh and hardened properties.Nowadays, engineers should have a deeper understanding of concrete mixes, than just specifying say 1:2:4 concrete mix ratio for their construction works.

get price

What Is a Concrete Mixer Types of Concrete Mixer ...

A concrete mixer (often colloquially called a cement mixer) is a device that homogeneously combines cement, aggregate such as sand or gravel, and water to form concrete. A typical concrete mixer uses a revolving drum to mix the components. The concrete mixer was invented by Columbus, Ohio industrialist Gebhardt Jaeger.

get price

The advantage and purpose of Concrete Mixed designs

Mar 13, 2020  Water to cement ratio: The ratio of water to cement should be tested for consistency, initial and final setting, soundness of the cement, workability, slump of the concrete and compacting factor. Workability: This is the measure of ease of mixing concrete without segregation or bleeding. It mostly depends on the designed slump of the concrete.

get price