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effect of mixing time on concrete workability effect on

effect of mixing time on concrete workability effect on

Effect of Mixing time On Concrete Workability Effect On ...

Apr 08, 2012  Effect of Mixing time On Concrete Workability Effect On Slump Conclusion. With the passage of time after mixing ingredients of concrete with water, workability of concrete starts shrinking. This happens because of fluidity loss from the concrete. Fluidity is the amount of available water in concrete that is being utilized in hydration of ...

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Influence of Mixing Time on Workability and Strength ...

A series of experiment based on different mixing time were carried out to investigate the effect of mixing time on slump, modified VC value and strength properties of concrete in different ...

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Influence of Mixing Time on Workability and Strength ...

A series of experiment based on different mixing time were carried out to investigate the effect of mixing time on slump, modified VC value and strength properties of concrete in different consistency. The flexural strength, compressive strength on the conditions of highly stiff s, stiff and plastic system was studied. The optimized mixing time was determined and its reason was analyzed.

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Effect of Mixing Time on Flowability and Slump Retention ...

Oct 26, 2015  Good workability at construction site is most important aspect of self-compacting concrete. But long delivery times can cause slump loss, which is more pronounced when mineral additives are incorporated into the concrete system. The aim of this paper is to study the effects of prolonged mixing on the flowability and slump retention under action of a high-performance

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Influence of Mixing Time on Workability and Strength ...

A series of experiment based on different mixing time were carried out to investigate the effect of mixing time on slump, modified VC value and strength properties of concrete in different ...

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Effects of mixing duration on engineering properties of ...

The initial concrete flow suggests good workability, but depending on mixing durations, remarkable variations in the workability retention over time were observed. For concrete with 1 min of mixing, the mix was workable for little more than 15 min after the discharge and

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Influence of Mixing Time on Workability and Strength ...

A series of experiment based on different mixing time were carried out to investigate the effect of mixing time on slump, modified VC value and strength properties of concrete in different consistency. The flexural strength, compressive strength on the conditions of highly stiff s, stiff and plastic system was studied. The optimized mixing time was determined and its reason was analyzed.

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Effect on Workability and Strengthof Concrete due to ...

Effect on Workability and Strengthof Concrete due to Variation in Mixing Water Temperature Renjuraj R, Shabana A, Salman Faris, Chinju G Mohan, Shahana M S, Archa M S, Sarath S . Abstract— This project was aimed at determining the effects of mixing-water temperature on the compressive strength andworkability of concrete.

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Factors Affecting Workability of Concrete - Civil Engineering

Fresh concrete stiffens with time and loss workability though it is not exactly settling or getting strength at all. After mixing concrete, some water is absorbed by aggregate, some may be lost by evaporation and some may be spent for initial chemical reactions. The loss in workability by time depends on various factors like:

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The Effects of Cement Variation on Concrete Workability

strongest correlation was found between workability and the time position where the heat evolution had its maximum value. 1. INTRODUCTION Recent studies have shown that the cement variations have a greater effect on the workability and on the early reactions of concrete than is generally thought of. These variations are greater with

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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 []

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How Fibers Affect the Workability of Concrete ABC ...

Dec 17, 2009  Above we have reviewed those factors related to the use of fibers in concrete that affect both the slump and workability of the concrete. Now we will look more closely at fiber’s effect on workability. Workability, as defined in ACI 116, is the measure of how readily the concrete can be mixed, placed, consolidated and finished.

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Workability, Setting Time and Strength of High-Strength ...

Workability is one of the significant characteristics of high-strength concrete because such concrete is produced using a low water-cementitious ratio. Thus, extensive utilization of high range water reducer is necessary in order to attain the required rheological characteristics to facilitate mixing, transporting, placing and compacting.

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Workability of Concrete - Types and Effects on Concrete ...

Workability of concrete can be divided into following three types: Unworkable Concrete. Medium Workable. Highly Workable Concrete. 1. Unworkable Concrete - Harsh Concrete. An unworkable concrete can also be called as harsh concrete. It is a concrete with very little amount of water. The hand mixing of such concrete is not easy.

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What Is Workability Of Concrete? Types And Effects On ...

Methods of Improving Workability of Concrete. To increase workability there are some ways like: 1- Increasing water/cement ratio. 2- Using larger aggregate. 3- Using well-rounded and smooth aggregate instead of irregular shape. 4- Increasing the mixing time and mixing temperature. 5- Using non-porous and saturated aggregate

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Effect of Mixing Time on Flowability and Slump Retention ...

Oct 26, 2015  Good workability at construction site is most important aspect of self-compacting concrete. But long delivery times can cause slump loss, which is more pronounced when mineral additives are incorporated into the concrete system. The aim of this paper is to study the effects of prolonged mixing on the flowability and slump retention under action of a high-performance

get price

The Effect of Quantity of Cement and Mixing Water on ...

The Effect of Quantity of Cement and Mixing Water on Strength and Durability of Concrete ... The concrete mix design was done in accordance to ACI 211.1- ... The Slump Test The objective of this test is to determine the workability and consistency of the mix in terms of amount of water and distribution of ingredients in the concrete mix. This ...

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Effect of Usage of Admixture in Concrete

The use of admixtures offers certain beneficial effects to concrete like improved workability, acceleration or retardation of setting time, reduce water cement ratio, and so on. There are two basic types of admixtures available: chemical mineral. Admixtures like flyash, silicate fume, slag comes in the category of mineral admixtures.

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Effects of mixing duration on engineering properties of ...

The initial concrete flow suggests good workability, but depending on mixing durations, remarkable variations in the workability retention over time were observed. For concrete with 1 min of mixing, the mix was workable for little more than 15 min after the discharge and

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The Effect of Mixing Technique and Prolonged Mixing Time ...

The Effect of Mixing Technique and Prolonged ... resulting in negative effect on technical parameters (workability and longer-term . ... Several studies present the results of prolonged mixing time on the properties of concrete. To reduce the negative impact of RCA on the concrete

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Influence of mixing time and superplasticizer dosage on ...

May 01, 2020  The effect of mixing time on concrete can be avoided or reduced by adding alternative cement materials or/and by increasing the SP dosage. Many researchers reported that the addition of high SP dosage may increase workability and decrease its negative effects that are caused by long mixing time 16 , 17 .

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Workability of Concrete – Definition – Factors affecting ...

Aug 20, 2019  Effect of time on workability of concrete. The time has same impact on workability of concrete, as is of the temperature. It is without a doubt that the concrete matrix gets stiffened with the passage of time, as a result of hydration reaction. The effect of time on workability is actually linked with the fluidity of concrete.

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All about Workability of Concrete - Structural Guide

The addition of supplementary cementitious materials improves the workability of the concrete. Time. Effect of the time on the workability of concrete quite known factors. Whatever we do can not control the drop of the workability of concrete. The conventional mix drops the slump of the concrete rapidly.

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Effect of mixing ingredient on workability and compressive ...

particles, more water is provided for concrete mixing (Neville, 2011). The effect of superplasticizer content to-wards workability and strength of POC LWAC is pre-sented in Figs. 3 and 4. The slump value measured be-tween 45 mm to 111 mm which is classified in medium to high slump. Unlike water-cement ratio effect, super-

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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 []

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Workability of Concrete - Types and Effects on Concrete ...

Workability of concrete can be divided into following three types: Unworkable Concrete. Medium Workable. Highly Workable Concrete. 1. Unworkable Concrete - Harsh Concrete. An unworkable concrete can also be called as harsh concrete. It is a concrete with very little amount of water. The hand mixing of such concrete is not easy.

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8 Factors that Affect the Workability of Fresh Concrete

The Factors that Affect the Workability of Concrete are Given Below: 01. Water Content of the Concrete Mix: Water content will have important influences on the workability in given volume of concrete. The higher the water content per cubic meter of concrete, the higher will be the fluidity of concrete, which affect the workability.

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Workability of Concrete - Tests Factors Affecting ...

Time and temperature: Fresh concrete gets stiffened as the time flows. This is because some of the water used to mix the concrete gets evaporated and some gets absorbed by the aggregates. Thus the workability of concrete reduces with time. This loss of workability with time is known as slump loss. The effect of temperature on workability of ...

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The effect of mixing water temperature on concrete ...

a key ingredient to the concrete mix, with direct impact on workability, strength and durability. The feasibility of cooling water as a remedial action in hot climate is covered for various project sizes. To achieve the work objective, four categories of concrete mixtures with various

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What Is Workability Of Concrete? Types And Effects On ...

Methods of Improving Workability of Concrete. To increase workability there are some ways like: 1- Increasing water/cement ratio. 2- Using larger aggregate. 3- Using well-rounded and smooth aggregate instead of irregular shape. 4- Increasing the mixing time and mixing temperature. 5- Using non-porous and saturated aggregate

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Effect of Cement Content on Concrete Performance

Class S(AE) concrete, to better determine how the mix proportions can change concrete properties. 36 different mixture designs were tested with 4 different w/cms, 3 different fly ash contents, and 3 different amounts of cementitious material.

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Mixing and Transporting Concrete

The mixing time is not standard for each batch. For example, a drum mixer with a small diameter creates a greater velocity than a drum mixer with a large diameter, therefore, the mixing time would be decreased. However, if the goal is stiffer concrete, a longer mixing time is required. 3.0 Transporting Concrete. Transporting the concrete mix is ...

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