influence of mixing time and superplasticizer dosage on

Influence of mixing time and superplasticizer dosage on ...

May 01, 2020  The effects of mixing time and suitable SP dosage still need further investigations to maintain the workability and consistency of concrete for a long time. In this study, workability was measured under 15, 30, 60, and 90 min mixing times and under increased SP dosages of 1.5%, 2%, 2.5%, and 3% at the mixing time of 90 min.

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Influence of mixing sequence and superplasticiser dosage ...

Jul 01, 2006  Samples from both mixing sequences were introduced in the viscometer for rheological testing after 5 min of stirring in the mixer and 2 min of static hydration.In the case of delayed addition, 2.5 extra minutes were required to assure that all the mass of initial paste could be mixed with the superplasticiser introduced.A detailed scheme of the mixing sequences is given in Fig. 1.

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Influence of mixing time and superplasticizer dosage on ...

Influence of mixing time and superplasticizer dosage on self-consolidating concrete properties Highlights•Production and optimization of self-consolidating concrete under the influence of different doses of superplasticizer.•Reduction of effect continuous mixing time on properties self-consolidating concrete.•Finding the applied relationship between increasing the dose of ...

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Influence of superplasticizer type and dosage on the slump ...

Oct 01, 2002  Influence of superplasticizer type and dosage on the slump loss of Portland cement mortars—Part II. ... The influence of the dose increase was very small for CE. However, ... The fluidity decreases with time after mixing of the mortars. This decrease in the fluidity is named slump loss.

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(PDF) Influence of Superplasticizer Compatibility on the ...

The influence of a superplasticizer by the name of Mighty 2000 confirmed that slump of fresh concrete can be optionally controlled in all mix-designs if reactive polymer is added [5]. ... Figure 1 is graphs plotted to present the comparison of setting time of different dosage of superplasticizer with control mix. Concrete with different dosages ...

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Influence of superplasticizer, temperature, resting time ...

Dec 01, 2015  This research gives continuity to the papers , , where the influence of mixing procedure, grout composition and the granularity of porous media on the grout injectability were studied. In the present article the influence of superplasticizer dosage, temperature, resting time and injection pressure on the grout injectability was studied through ...

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Influence of superplasticizer type and dosage on the slump ...

Oct 01, 2002  Influence of superplasticizer type and dosage on the slump loss of Portland cement mortars—Part II. ... The influence of the dose increase was very small for CE. However, ... The fluidity decreases with time after mixing of the mortars. This decrease in the fluidity is named slump loss.

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Effect of superplasticizer type and dosage on fluidity and ...

Oct 30, 2018  Effect of superplasticizer dosage on compressive strength UCS of CTB with a solid content fixed at (a) 65%, (b) 66%, (c) 68% and (d) 70% as a function of curing time (7, 14 and 28 days). As shown in Fig. 6 , it can be said that the superplasticizer dosage has a positive role in determining the fluidity of fresh CTB samples.

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(PDF) Influence of Superplasticizer Compatibility on the ...

The influence of a superplasticizer by the name of Mighty 2000 confirmed that slump of fresh concrete can be optionally controlled in all mix-designs if reactive polymer is added [5]. ... Figure 1 is graphs plotted to present the comparison of setting time of different dosage of superplasticizer with control mix. Concrete with different dosages ...

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Use of Water Reducers, Retarders, and Superplasticizer

Figure 1 Influence of Dosage of Retarders on Slump (Neville, 1995). WRA has been used primarily in hot weather concrete placing, pumping, and tremie. Careful concrete placement is required, as the initial setting time of concrete will take place an hour earlier.

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Dosage effect of superplasticizer on self-compacting ...

Apr 01, 2019  Influence of organic products on the rheological properties of concrete mixture was the subject of many studies by authors , , , , , , , , , , who showed that the improvement of the rheological and mechanical properties by the superplasticizer is due to the release the water between cement particles and the increase of the water films coating ...

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Effects Superplasticizer Type and Dosage on The Properties ...

comparison with that of superplasticizer type KUT PLAST PCE600. Also, the use of two different dosages of two chemical admixtures (ViscoCrete-5930 and KUT PLAST PCE600) at the same time in the mix was investigated. As shown in the mentioned table, the use of dosage 1.5% of ViscoCrete-5930 by weight of cement with

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Influence of Superplasticizer Compatibility on the Setting ...

Oct 14, 2016  The adverse effects of elevated temperatures on the properties of the fresh concrete include increased water demand, shorter setting time and increased slump loss. Superplasticizer (SP) is important to enhance the workability and setting time of concrete under hot weather, hence, an experimental investigation was conducted to determine the effect of dosage of the mentioned admixture.

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(PDF) Effect of Superplasticizer Dosage on Workability and ...

Effect of Superplasticizer Dosage on Workability and Strength Characteristics of Concrete. D. Alsadey. Related Papers. Influence of Superplasticizer Compatibility on the Setting Time, Strength and Stiffening Characteristics of Concrete.

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COMPARISON AND OPTIMIZATION OF DOSAGE OF

Fig.2 Mixing Of Sample Results and discussion:“T” is the time in sec taken by 1 liter of cement slurry to empty the Marsh cone which is known as “Marsh Cone Time”. The time “T” for various mixes was noted and tabulated as shown in Table-4. A graph can be prepared for time “T” and dosages of Super plasticizer.

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Cement - Superplasticizer Compatibility

S. Chandra, Bjornstrom, Influence of Cement and Superplasticizer type and dosage on the fluidity of cement mortars, Cem Concr Res 32 (2002) 1613 – 1619. M. Collepardi, Admixtures used to enhance placing characteristics of concrete, Cem Concr Compose 20 (1998) 103-112.

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Behaviour of Normal Concrete Using Superplasticizer under ...

They studied the influence of variation in dosage quantity and number of superplasticizer addition. They also emphasized on settlement duration of superplasticizer. They recommended high dosages after an experiment in which lower dosage did not produce any significant effect. They also recommended late mixing and double dosage of superplasticizer.

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INFLUENCE OF THE SUPERPLASTICIZER TYPE ON THE

INFLUENCE OF THE SUPERPLASTICIZER TYPE ON THE COMPRESSIVE STRENGTH OF REACTIVE ... After mixing all the ingredients including water in a laboratory pan mixer for 5 ... by the AP admixture can be ascribed to the high dosage of this superplasticizer (4-5 times higher than the usual dosage, i.e. 0.3% of dry polymer by cement mass) and the specific ...

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EFFECT OF SUPERPLASTICIZER ON PROPERTIES OF MORTAR

Keywords: mortar, cement, superplasticizer, temperature, saturation dosage, strength INTRODUCTION Superplasticizers are chemical admixtures used where well-dispersed particle suspension is required (Ramachandran, 1995, Wikipedia, 2018). They have become indispensable constituents of any designed cement mortar mix today.

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Influence of mixing procedure and mixer type on fresh and ...

May 10, 2012  Mixing concrete is not yet a fully understood issue, with many parameters having an influence on the resulting fresh and hardened concrete properties. Even for the same composition, a somewhat different microstructure can be obtained by changing the mixing procedure and the mixer type. A mixing procedure can differ in mixing time, mixing speed, air pressure in the mixing pan, addition time

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Use of Water Reducers, Retarders, and Superplasticizer

Figure 1 Influence of Dosage of Retarders on Slump (Neville, 1995). WRA has been used primarily in hot weather concrete placing, pumping, and tremie. Careful concrete placement is required, as the initial setting time of concrete will take place an hour

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(PDF) Influence of Superplasticizer Compatibility on the ...

The influence of a superplasticizer by the name of Mighty 2000 confirmed that slump of fresh concrete can be optionally controlled in all mix-designs if reactive polymer is added [5]. ... Figure 1 is graphs plotted to present the comparison of setting time of different dosage of superplasticizer with control mix. Concrete with different dosages ...

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Influence of Superplasticizer Compatibility on the Setting ...

Oct 14, 2016  The adverse effects of elevated temperatures on the properties of the fresh concrete include increased water demand, shorter setting time and increased slump loss. Superplasticizer (SP) is important to enhance the workability and setting time of concrete under hot weather, hence, an experimental investigation was conducted to determine the effect of dosage of the mentioned admixture.

get price

(PDF) Effect of Superplasticizer Dosage on Workability and ...

Effect of Superplasticizer Dosage on Workability and Strength Characteristics of Concrete. D. Alsadey. Related Papers. Influence of Superplasticizer Compatibility on the Setting Time, Strength and Stiffening Characteristics of Concrete.

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Effects Superplasticizer Type and Dosage on The Properties ...

comparison with that of superplasticizer type KUT PLAST PCE600. Also, the use of two different dosages of two chemical admixtures (ViscoCrete-5930 and KUT PLAST PCE600) at the same time in the mix was investigated. As shown in the mentioned table, the use of dosage 1.5% of ViscoCrete-5930 by weight of cement with

get price

INFLUENCE OF THE SUPERPLASTICIZER TYPE ON THE

INFLUENCE OF THE SUPERPLASTICIZER TYPE ON THE COMPRESSIVE STRENGTH OF REACTIVE ... After mixing all the ingredients including water in a laboratory pan mixer for 5 ... by the AP admixture can be ascribed to the high dosage of this superplasticizer (4-5 times higher than the usual dosage, i.e. 0.3% of dry polymer by cement mass) and the specific ...

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COMPARISON AND OPTIMIZATION OF DOSAGE OF

Fig.2 Mixing Of Sample Results and discussion:“T” is the time in sec taken by 1 liter of cement slurry to empty the Marsh cone which is known as “Marsh Cone Time”. The time “T” for various mixes was noted and tabulated as shown in Table-4. A graph can be prepared for time “T” and dosages of Super plasticizer.

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EFFECT OF SUPERPLASTICIZER ON PROPERTIES OF MORTAR

Keywords: mortar, cement, superplasticizer, temperature, saturation dosage, strength INTRODUCTION Superplasticizers are chemical admixtures used where well-dispersed particle suspension is required (Ramachandran, 1995, Wikipedia, 2018). They have become indispensable constituents of any designed cement mortar mix today.

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Behaviour of Normal Concrete Using Superplasticizer under ...

They studied the influence of variation in dosage quantity and number of superplasticizer addition. They also emphasized on settlement duration of superplasticizer. They recommended high dosages after an experiment in which lower dosage did not produce any significant effect. They also recommended late mixing and double dosage of superplasticizer.

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Cement - Superplasticizer Compatibility

S. Chandra, Bjornstrom, Influence of Cement and Superplasticizer type and dosage on the fluidity of cement mortars, Cem Concr Res 32 (2002) 1613 – 1619. M. Collepardi, Admixtures used to enhance placing characteristics of concrete, Cem Concr Compose 20 (1998) 103-112.

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Adsorption of plasticizers – Influence of plasticizer and ...

change noticeable with time. This observation is backed by Chiocchio and Paolini13 who claimed that the adsorption of SNF and SMF is terminated after only 1-2 minutes of mixing. resistance with time It was generally found that flow loss is dependent on the cement type and type and dosage of superplasticizer. Flow loss

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(PDF) Influence of Superplasticizer on Strength of ...

Mechanism of superplasticizer is through giving the cement particles highly negative charge so that they repel each other due to the same electrostatic charge. By deflocculating the cement particles, more water is provided for concrete mixing [5]. For general usage, dosage of superplasticizer is between 1-3 l/m 3 .

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Materials Science Research International, Vol.2, No.4, pp ...

INFLUENCES OF SUPERPLASTICIZER, MIXING TIME, MIXING TEMPERATURE AND CEMENT CONTENT ON HIGH-VOLUME FLY ASH CONCRETE ... dosage of superplasticizer is lower than that of the ligninsulfonic acid based one. Thus concrete ... Influence of mixing time on the slumps and the compressive strength of each concrete.

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Admixtures of Concrete - Ultimate Guide - Construction How

Apr 08, 2020  The effectiveness of a given dosage of a superplasticizer depends on the w/c ratio of the mix. At a given dosage of the superplasticizer, the effectiveness in reducing water demand is much higher at low w/c ratios than at high w/c ratio For example: At w/c = 0.40, the water reduction is reported to be 23%, whereas for the same dosage of the ...

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