ppt on workability of concrete

Factors-that-influence-the-workability-of-concrete-are ...

Sep 26, 2020· The slump test, ASTM C143, Standard Test Method for Slump of Hydraulic-Cement PPT Sponsored Links Displaying Powerpoint Presentation on factors that influence the workability of concrete are listed consistency available to view or download.

Flow Table Test for Concrete || Test for Workability of ...

May 20, 2018· This video (Animation, Animated Video) explains the procedure for determination of workability of concrete by flow table test. (Civil Engineering Animated Vi...

principles of concrete mix design.ppt - ACC Help

Concrete Mix Design -Definition Concrete mix design is defined as the appropriate selection and proportioning of constituents to produce a concrete with pre-defined characteristics in the fresh and hardened states. In general, concrete mixes are designed in order to achieve a defined workability, strength and durability .

Properties of Concrete - Memphis

the workability) can be had from a standard slump test. Most concrete mixes have slumps in the 2- to 5-in range. Slump Test A good indication of the water content of a mix and thus the workability) can be had from a standard slump test. CIVL 1101 Introduction to Concrete 7/10

concrete works presentation.ppt | Construction Aggregate ...

Concrete Works. What is Concrete? Concrete is a construction material composed of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel, limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures. Concrete is strong in COMPRESSION, as the aggregate ...

Test 1 : Standard Slump and Flow Table Tests

improves plasticity and workability. Pozzolith 400 N, a high-water-reducing admixture designed to produce concrete with a high workability is also added. As shown in Table 1.1, seven batches were tested for workability and flow. Batch one established the reference slump value for the Kistner mix using the standard ASTM cone test.

WHAT ARE THE FACTORS AFFECTING WORKABILITY OF CONCRETE ...

Apr 04, 2014· Factors Affecting Workability of Concrete A concrete is said to be workable if it is easily transported, placed, compacted and finished without any segregation. Workability is a property of freshly mixed concrete, and a concrete is a mixture of cement, aggregate, water & admixture. Due to this all the properties of concrete, whether in fresh […]

Workability of Concrete | Factors Affecting Workability of ...

Feb 10, 2017· Workability is one of the physical parameters of concrete which affects the strength and durability as well as the cost of labor and appearance of the finished product.Concrete is said to be workable when it is easily placed and compacted homogeneously i.e without bleeding or Segregation.Unworkable concrete needs more work or effort to be compacted in place, also …

Factors Affecting Strength And Workability Of Concrete ...

Water content and water-cement ratio – Higher the water content, higher is the workability of the concrete As per Abram's law, the strength of workable concrete depends onwater-cement ratio. Water cement ratio is the measure of the void volume that is relative to the solid volume. Its strength goes on increasing as the voids go on decreasing.

Concrete and Masonry Construction

Concrete and Masonry Construction 29 CFR 1926, Subpart Q General overview of the OSHA regulation Definitions General requirements Load placement Impalement hazards Post-tensioning operations Concrete buckets Hazards of working with concrete Equipment and Tools Bulk cement storage Lockout/Tagout Concrete mixers Power concrete trowels Concrete buggies Equipment and Tools Concrete …

Admixtures for Concrete - Memphis

concrete exposed to cycles of freezing and thawing (Fig. 6-2). Entrained air greatly improves concrete's resistance to surface scaling caused by chemical deicers (Fig. 6-3). Fur-thermore, the workability of fresh concrete is improved significantly, and segregation and bleeding are reduced or eliminated. Air-entrained concrete contains minute ...

Chapter 5.ppt - Materials of Construction(805261 Chapter 5 ...

View Chapter 5.ppt from AA 1Materials of Construction (805261) Chapter 5: Fresh Concrete Introduction Workability Factors Affecting Workability Cohesion and Segregation Bleeding Workability

Ppt Workability-of-concrete | Powerpoint Presentations and ...

Factors That Influence The Workability Of Concrete Are Listed. Consistency. The PPT. Presentation Summary : Factors that influence the workability of concrete are listed. Consistency. The slump test, ASTM C143, Standard Test Method for Slump of Hydraulic-Cement

PPT – Formwork PowerPoint presentation | free to view - id ...

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Workability of Concrete - Tests & Factors Affecting ...

Workability of concrete is defined as the ease and homogeneity with which a freshly mixed concrete or mortar can be mixed, placed, compacted and finished. Strictly, it is the amount of useful internal work necessary to produce compaction.

What is Workability of Concrete? - Gilson Co.

Workability of Concrete is a broad and subjective term describing how easily freshly mixed concrete can be mixed, placed, consolidated, and finished with minimal loss of homogeneity. Workability is a property that directly impacts strength, quality, appearance, and even the cost of labor for placement and finishing operations.

Workability of Concrete - SlideShare

Oct 20, 2018· Workability The ease with which concrete mixes can be compacted as completely as possible while using the lowest possible water/cement ratio. OR Workability is the ability of a fresh (plastic) concrete mix to fill the form/mold properly with the desired work (vibration) and without reducing the concrete…

Aggregates for Concrete - Memphis

requirements, workability, pumpability, economy, poros-ity, shrinkage, and durability of concrete. Variations in grading can seriously affect the uniformity of concrete from batch to batch. Very fine sands are often uneconomi-cal; very coarse sands and coarse aggregate can produce harsh, unworkable mixtures. In general, aggregates that

Fresh Concrete: Workability

Additional information on workability and quality of concrete can be obtained by observing the manner in which concrete slumps. Quality of concrete can also be further assessed by giving a few tappings or blows by tamping rod to the base plate. The deformation shows the characteristics of concrete with respect to tendency for segregation.

15 Factors Affecting Durability of Concrete - The Constructor

Quantity of cement used in concrete mix will also be a factor affecting durability of concrete. If cement content used is lower than the required, then water cement ratio becomes reduced and workability also reduced. Adding more water to this mix results in formation capillary voids which will make concrete as permeable material.

Steel Fibre Reinforced Concrete Seminar PPT with Pdf Report

Mar 14, 2015· Polymer Modified Steel Fibre Reinforced Concrete Seminar and PPT with pdf report:The steel fiber reinforced concretes are the building materials which are more significance very fast because of the enhancing demand for high building properties in the building materials.These compounds have a more tensile strength to compress, more toughness and more absorption of energy.

PRESENTATION ON CONCRETE - SlideShare

Aug 03, 2016· • Workability could also be improved by adding air entraining agent such as vinsol resin or Darex. • Use of Lisapole liquid at 30 cubic centimeter per bag of cement improves not only the workability but also the water tightness of concrete. • Workability of concrete is better determine by compaction factor test. 17.

Cement & Concrete Hazards In Construction

Concrete Burns • Sand contained in fresh concrete is abrasive to bare skin • Portland is an alkaline. Strong bases (ph of 12-13) are just as hazardous as strong acids to the skin but have no initial signs of pain such as a burning sensation. • Drying Portland is hygroscopic – it …

IN PRESTRESSED CONCRETE BRIDGE CONSTRUCTION

therefore necessary to enable concrete bridges to be slid forward by steps; the skilful use of prestressing is the most important of these measures. One may ask why it was that the essential features of the now well-known incremental launching method were only used for the first time in a prestressed concrete bridge, when the bridge over the Rio

Fiber-Reinforced Concrete Seminar PPT with pdf report

Feb 12, 2015· Sumit Thakur Civil Fiber-Reinforced Concrete (FRC) Seminar and PPT with pdf report: Fiber-Reinforced Concrete (FRC) is concrete consisting fibrous material which increases its structural purity. It holds short discrete fibers that are uniformly distributed and circumstances oriented.This page contains Fiber-Reinforced Concrete (FRC) Seminar and PPT with pdf report.

Temperature Effect On Concrete Workability | Effect On ...

Apr 10, 2012· When fresh concrete is laid at the site then proper curing of concrete is required, because structures are exposed to the environment and in these conditions if there is no such an arrangement against the environment, then there are many factors that affect the workability of concrete and temperature is One of them. Temperature, almost in every aspect has negative effects …

Factors Affecting Strength of Concrete - The Constructor

There is one thing missing on the graph. For a given cement content, the workability of the concrete is reduced if the water/cement ratio is reduced. A lower water cement ratio means less water, or more cement and lower workability. However if the workability becomes too low the concrete becomes difficult to compact and the strength reduces.

CONCRETE BASICS A Guide to Concrete Practice

The SLUMP test shows the WORKABILITY of concrete. Workability measures how easy the concrete is to place, handle and compact. See CHAPTER 2 Concrete Properties The COMPRESSION test. The COMPRESSION test shows the best possible strength concrete can reach in perfect conditions. The compression test measures concrete strength in the hardened state.

23 Types of Concrete Used in Construction and their ...

13. Self - Consolidated Concrete The concrete mix when placed will compact by its own weight is regarded as self-consolidated concrete. No vibration must be provided for the same separately. This mix has a higher workability. The slump value will be between 650 and 750. This concrete due to its higher workability is also called as flowing concrete.

(PPT) PPT ON CONCRETE FORMWORK ETC | Dhanjay Girdhar ...

PPT ON CONCRETE FORMWORK ETC. Download. ... For guidance, the mixing time shall be at least 2 min. Workability should be checked at frequent intervals Dosages of retarders, plasticisers and super plasticisers shall be restricted to 0.5, l.0 and 2.0% respectively by weight of cementitious materials . ...

General Considerations for Workability of Concrete ...

Sep 27, 2013· The higher the aggregate/cement ratio, the leaner is the concrete. In lean concrete, less quantity of paste is available for lubrication, per unit surface area of aggregate and hence the mobility reduce. In case of rich concrete with lower aggregate/cement ratio, more paste is available to make the mix cohesive and fatty to give better workability.

Report on Measurements of Workability and ... - Concrete

workability in terms of fundamental physical entities, as described in the science of rheology. Therefore, this report has four main parts: 1. Definitions related to rheology and workability; 2. Critical review of the tests available to measure the workability and rheological performance of fresh concrete; 3.

Concrete - SlideShare

May 20, 2015· Concrete 1. LOGO " Add your company slogan " CONCRETE 2. INTRODUCTION OF CONCRETE Concrete is a mixture of sand, gravel, crushed rock or other aggregate held together by a hardened paste of cement and water. This mixture, when properly proportioned, is at first a plastic mass that can be cast or molded into a predetermined size and …

Lab 1 – Concrete Proportioning, Mixing, and Testing

WORKABILITY is the relative ease or difficulty of placing and consolidating concrete. When placed, all concrete should be as stiff as possible, yet maintain a homogeneous, and void less mass. Too much stiffness, however, makes it too difficult or impossible to work the concrete …

CEMENT and CONCRETE TECHNOLOGY

xHigh-Strength Concrete xHigh Workability or Flowing Concrete xShrinkage Compensating Concrete xFiber-Reinforced Concrete xConcrete Containing polymers xHeavyweight Concrete xMass Concrete xRoller-Compacted Concrete. The History of Concrete Cement has been around for at least 12 million years. When the earth itself was

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

concrete consisting sand with fines content of 2%, 4%, 6%, 8%, 10% and 12% with three constant water/cement ratios of 0.55, 0.60 and 0.70 were prepared for the study. The amounts of coarse aggregate used were kept constant for all batches. The concrete were mixed using 1m3 drum concrete mixer. Workability test: Slump measurement was taken

Concrete PowerPoint Templates w/ Concrete-Themed Backgrounds

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