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Concrete mixing kinetics by means of power measurement

Concrete mixing kinetics by means of power measurement

Concrete mixing kinetics by means of power

2009-3-1  From a research point of view, the power measurement is utilized here to better understand the microstructural mixture evolution during mixing. From the industrial point of view, a better understanding of this mixing kinetics permits a better use of in-situ power measurements to control the process. 3. Mixture evolution during concrete mixing

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Concrete mixing kinetics by means of power

This paper introduces a new model for concrete mixing kinetics. The model defines five successive stages through which the mixture characteristics change. It is also shown that the time-variation of the mixer power consumption is a relevant tool to identify the transient stages of the mixture during mixing.

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Concrete Mixing Kinetics by Means of Power

Concrete Mixing Kinetics by Means of Power Measurement. This paper introduces a new model for concrete mixing kinetics. The model defines 5 successive stages through which the mixture characteristics change.

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10.1016/j.cemconres.2008.12.005 10.1016/j ... -

Concrete mixing mainly consists of dispersing constituents into the mixed volume and then having the mixture evolve from a wet granular state to a granular suspension microstructure. While some of the research regarding constituents' dispersion in concrete or cement paste has been described in the literature [4,6–12] , less interest was given to the microstructural evolution during mixing.

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Paper: The effects of mixing time on cement paste

Cazacliu, B. and Roquet, N. 2009, ‘Concrete mixing kinetics by means of power measurement’, Cement and Concrete Research, vol. 39, no. 3, pp. 182-194. Chopin, D., Cazacliu, B., Larrard, F.D. and Schell, R. 2007, ‘Monitoring of concrete homogenization with the power consumption

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Deep Learning Approach for Estimating Workability of

2018-11-25  B. Cazacliu and N. Roquet, “Concrete mixing kinetics by means of power measurement,” Cement and Concrete Research, vol. 39, no. 3, pp. 182–194, 2009. View at: Publisher Site Google Scholar Y. LeCun, L. Bottou, Y. Bengio, and P. Haffner, “Gradient-based learning applied to document recognition,” Proceedings of the IEEE , vol. 86, no. 11, pp. 2278–2323, 1998.

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Monitoring of concrete mixing evolution using image

2021-5-30  concrete mixing. They defined six mixing stages by a simple approach (Figure 1), using the mixing power measurement and its fluctuation and they determined also two transition points, the “maximum cohesion point” and “the fluidity point”. These two points are reliable indicators of the mixing

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[PDF] Measurement of Workability of Fresh Concrete

Nine concrete mixtures with different values of yield stress and plastic viscosity were tested in a concrete truck. The measurements made with the truck were based on the typical method of determining the flow behavior in a traditional fluid rheometer; that is, the shear rate in the mixing truck was swept from high to low by varying the rotation speed of the drum.

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Study of the Mixing Completion in Concrete

2019-9-8  Study of the Mixing Completion in Concrete Production by Means of an on-Board Sensor System

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Concrete Mixing Methods and Concrete Mixers: State

2001-4-1  The methodology to determine the quality of the concrete mixed is often referred to as the measurement of the efficiency of the mixer. The efficiency parameters of a mixer are affected by the order in which the various constituents of the concrete are introduced into the mixer, the type of mixer, and the mixing energy (power and duration) used.

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A new analysis of concrete mixing kinetics by means ...

A new analysis of concrete mixing kinetics by means of power measurement . By . Abstract. This paper introduces a new model for concrete mixing kinetics. The model defines five successive stages through which the mixture characteristics change. It is also shown that the time-variation of the mixer power consumption is a relevant tool to ...

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A new analysis of concrete mixing kinetics by means

This paper introduces a new model for concrete mixing kinetics. The model defines five successive stages through which the mixture characteristics change. It is also shown that the time-variation of the mixer power consumption is a relevant tool to identify the transient stages of the mixture during mixing.

get price

Monitoring of concrete mixing evolution using image

2021-5-30  concrete mixing. They defined six mixing stages by a simple approach (Figure 1), using the mixing power measurement and its fluctuation and they determined also two transition points, the “maximum cohesion point” and “the fluidity point”. These two points are reliable indicators of the mixing

get price

Monitoring of concrete mixing evolution using image ...

2017-1-1  The practice of performing measurements on the mixer is consolidated since a long time. Following precursor studies , , , the most important monitoring technique developed during the last decade is the mixer power consumption evolution with mixing time (power curve).Two attempts to adapt the analysis of the power curve to concrete receipts using high amount of admixture were proposed

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In-mixer measurements for describing mixture

2008-12-1  Concrete mixing experiments have been carried out at an industrial batching plant during a typical production day. 34 batches were tested, including a number of water-to-powder mass ratios, paste contents and mixer filling ratios. Three “in-mixer” measurements yield critical information about mixture composition: mixing power, Orbiter – a ...

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[PDF] Measurement of Workability of Fresh Concrete

The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with different values of yield stress and plastic viscosity were tested in a concrete truck. The measurements made with the truck were based on the ...

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Concrete Mixing Methods and Concrete Mixers: State

2001-4-1  The methodology to determine the quality of the concrete mixed is often referred to as the measurement of the efficiency of the mixer. The efficiency parameters of a mixer are affected by the order in which the various constituents of the concrete are introduced into the mixer, the type of mixer, and the mixing energy (power and duration) used.

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[PDF] RHEOLOGY-BASED MIXING PROCESS TO

In current research approaches a combined two-stage mixing concept is developed, to produce fresh concrete with continuously high quality in respect of its workability and robustness. In practice, there is a strong demand to ensure an excellent pumping of the fresh concrete mixture. Normally, for standard vibrated concretes problems are rare on construction site.

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Internal curing of cement pastes by means of ...

The kinetics of water release from SAPs were studied by neutron tomography. • The time window for internal curing was linked to the water release from SAPs. • The water release links to the SAP effectiveness to mitigate autogenous shrinkage. • One SAP type was effective while another prematurely released its stored water.

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Concrete Mixing Ratios - How To Make Concrete

3000 psi concrete mix ratio. To produce a 3000 psi cubic yard of concrete (27 cubic feet) the concrete mixture ratio is: 517 pounds of cement or (234kg) 1560 pounds of sand or (707kg) 1600 pounds of stone or (725kg) 32 - 34 gallons of water or (132L) This mixing ratio will give you a concrete

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A new analysis of concrete mixing kinetics by means

This paper introduces a new model for concrete mixing kinetics. The model defines five successive stages through which the mixture characteristics change. It is also shown that the time-variation of the mixer power consumption is a relevant tool to identify the transient stages of the mixture during mixing.

get price

Monitoring of concrete mixing evolution using image

2021-5-30  concrete mixing. They defined six mixing stages by a simple approach (Figure 1), using the mixing power measurement and its fluctuation and they determined also two transition points, the “maximum cohesion point” and “the fluidity point”. These two points are reliable indicators of the mixing

get price

Concrete Mixing Methods and Concrete Mixers: State

2001-4-1  The methodology to determine the quality of the concrete mixed is often referred to as the measurement of the efficiency of the mixer. The efficiency parameters of a mixer are affected by the order in which the various constituents of the concrete are introduced into the mixer, the type of mixer, and the mixing energy (power and duration) used.

get price

Standard Practice for Measuring Hydration Kinetics of ...

5.1 Thermal power curves are used to evaluate the isothermal hydration kinetics of the combined mixture of different materials during the early period after being mixed with water. These isothermal power curves, or hydration profiles, may provide indications relative to setting characteristics, compatibility of different materials, sulfate balance and early strength development.

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THE RELATIONSHIP BETWEEN MIXING TIME AND

the aims of the investigation were to determine whether the present generally applicable minimum mixing of 1 1/2 minutes is justified with respect to various types of mixer and to evolve a suitable method for the future standardized testing of concrete mixers. the theories on which the organization of the study is based are discussed. various factors influence the relationship between mixing ...

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Internal curing of cement pastes by means of ...

The kinetics of water release from SAPs were studied by neutron tomography. • The time window for internal curing was linked to the water release from SAPs. • The water release links to the SAP effectiveness to mitigate autogenous shrinkage. • One SAP type was effective while another prematurely released its stored water.

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Reaction Kinetics - University of Oxford

2008-3-7  3 concentration of N 2, H 2, or NH 3.Say we monitor N 2, and obtain a rate of - d[N 2] dt = x mol dm-3 s-1. Since for every mole of N 2 that reacts, we lose three moles of H 2, if we had monitored H 2 instead of N 2 we would have obtained a rate - d[H 2] dt = 3x mol dm-3 s-1.Similarly, monitoring the concentration of NH 3 would yield a rate of 2x mol dm-3 s-1.Clearly, the same reaction cannot ...

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Concrete Mixing Ratios - How To Make Concrete

3000 psi concrete mix ratio. To produce a 3000 psi cubic yard of concrete (27 cubic feet) the concrete mixture ratio is: 517 pounds of cement or (234kg) 1560 pounds of sand or (707kg) 1600 pounds of stone or (725kg) 32 - 34 gallons of water or (132L) This mixing ratio will give you a concrete

get price

VCCTL Software NIST

2019-11-7  VCCTL Software. The Virtual Cement and Concrete Testing Laboratory (VCCTL) software provides a virtual testing laboratory environment that can be used by concrete scientists, engineers, and technologists for virtual testing of cement paste and concrete

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Ultrahigh Performance Nanoengineered

2018-4-23  Thus, we have incorporated graphene into concrete by mixing the water-based graphene dispersions with ordinary Portland cement (OPC), fine dry sand, and 10 mm coarse aggregate; see Figure 2A and Experimental Sections. Various solutions with different concentrations of FG and IG in water were investigated in order to optimize the performance of ...

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