Use of a Moisture Sensor for Monitoring the Effect of Mixing Procedure on Uniformity of Concrete Mixtures

Wang, Kejin; Hu, Jiong

doi:10.3151/jact.3.371

Cited by 19 publications

(9 citation statements)

References 10 publications

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“…This test was found to be suitable only for concretes with low and moderate workability. The Vibra-John test (Wang and Hu, 2005) is similar to the L-box test;…”

Section: (3) Vibration Testsmentioning

confidence: 99%

A study of effects of aggregate on concrete rheology

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“…This test was found to be suitable only for concretes with low and moderate workability. The Vibra-John test (Wang and Hu, 2005) is similar to the L-box test;…”

Section: (3) Vibration Testsmentioning

confidence: 99%

A study of effects of aggregate on concrete rheology

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“…Water content in fine and coarse aggregates needs to be carefully controlled, as fluctuations result in lower product quality. Microwave humidity sensors can be installed in the aggregate bins or in the conveyor belt, but they can also be installed inside the mixer (Boscolo et al, 1993;Wang and Hu, 2005). An automatic control system, takes information from the sensors and adjusts the water in the mixer.…”

Section: Humidity Controlmentioning

confidence: 99%

“…According to Wang and Hu (2005), humidity sensors, when used appropriately and except from determining the water content of the concrete mix, can also determine product homogeneity. The results deriving from the use of humidity sensors can be used to improve product quality and optimize the mixing cycle.…”

Section: ) Track Power Consumption Change During Mixing According Tomentioning

confidence: 99%

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry

Kermeli¹,

Worrell²,

Masanet³

2011

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The U.S. concrete industry is the main consumer of U.S.-produced cement. The manufacturing of ready mixed concrete accounts for more than 75% of the U.S. concrete production following the manufacturing of precast concrete and masonry units. The most significant expenditure is the cost of materials accounting for more than 50% of total concrete production costs -cement only accounts for nearly 24%. In 2009, energy costs of the U.S. concrete industry were over $610 million. Hence, energy efficiency improvements along with efficient use of materials without negatively affecting product quality and yield, especially in times of increased fuel and material costs, can significantly reduce production costs and increase competitiveness.The Energy Guide starts with an overview of the U.S. concrete industry's structure and energy use, a description of the various manufacturing processes, and identification of the major energy consuming areas in the different industry segments. This is followed by a description of general and process related energy-and cost-efficiency measures applicable to the concrete industry. Specific energy and cost savings and a typical payback period are included based on literature and case studies, when available. The Energy Guide intends to provide information on cost reduction opportunities to energy and plant managers in the U.S. concrete industry. Every cost saving opportunity should be assessed carefully prior to implementation in individual plants, as the economics and the potential energy and material savings may differ.

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“…Also, the manufacture of high-performance concrete requires the measurement of the moisture state during the concrete manufacturing process. (2,3) In addition, to diagnose the deterioration of concrete structures, it is also necessary to measure the water condition in concrete. For the moisture measurement of concrete, a dielectric hygrometer or the like, which can detect changes in capacitance, is used.…”

Section: Introductionmentioning

confidence: 99%

Pursuing a Possibility of Fabricating Moisture Measurement Devices Using Microwaves Passing through Materials ?Proposition of Measuring Quantity of Water Level Using Microwaves Passing through the Water Tank as the First Step of Development?

Akimoto¹,

Maruyama²,

Miyagawa³

et al. 2019

Sensors and Materials

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In recent years, an increasing number of sensors are being required in various industrial or automated production techniques. In particular, the need for moisture measurement is high, but a noncontact high-precision moisture sensor has not been put to practical use. Therefore, in this research, we focused on a moisture sensor that transmits microwaves and tested two methods for evaluation and verification. In the experiment, the water in the water tank was measured using radio waves of 2.4 GHz. As a result, although measurement could not be performed with high accuracy using the received signal strength, measurement using the propagation delay time was highly accurate. This result will provide an index for the application of moisture sensors using microwaves in the future.

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Use of a Moisture Sensor for Monitoring the Effect of Mixing Procedure on Uniformity of Concrete Mixtures

Cited by 19 publications

References 10 publications

A study of effects of aggregate on concrete rheology

A study of effects of aggregate on concrete rheology

Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry

Pursuing a Possibility of Fabricating Moisture Measurement Devices Using Microwaves Passing through Materials ?Proposition of Measuring Quantity of Water Level Using Microwaves Passing through the Water Tank as the First Step of Development?

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