Low cost system for measuring the evolution of mechanical properties in cement mortars as a function of mixing water

Álvarez, Evelia Franco; Vega, Daniel Ferrández; Saíz, Pablo; Fernández, Carlos Morón

doi:10.1016/j.conbuildmat.2020.118127

Cited by 7 publications

(4 citation statements)

References 27 publications

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“…Ohm's law was used to calculate the equivalent power consumption during the test. The use of sensors attached to Arduino systems has been successfully used in recent published cementitious composite studies [45]- [51].…”

Section: Mixing Energy Methodsmentioning

confidence: 99%

Measuring packing density and water demand of Portland cement and SCMs by the mixing energy method

Soto

Macioski

Araújo

et al. 2023

Rev. IBRACON Estrut. Mater.

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Wet packing methods evaluate the packing density of fine materials through the determination of the apparent density and voids content of pastes with different water to solids (w/s) ratios. Its goal is to estimate the minimum water demand to achieve the maximum solids concentration in the mixture, a parameter applied to the mix design of cementitious composites based on particle packing theories. Since most methods based on apparent density are time-consuming and require a high volume of materials, this paper aims to evaluate the mixing energy method as an alternative for the wet packing method and to adapt it to be used for SCMs (supplementary cementitious materials). With a reduced time and material to perform the test, results demonstrate a better precision of the mixing energy due to its discrete measurement. The ideal water flow and initial volume of materials to perform the test on cement and SCMs are discussed.

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Section: Mixing Energy Methodsmentioning

confidence: 99%

Measuring packing density and water demand of Portland cement and SCMs by the mixing energy method

Soto

Macioski

Araújo

et al. 2023

Rev. IBRACON Estrut. Mater.

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“…Finally, it is necessary to highlight that the total cost of the designed Arduino humidity sensor was approximately 35 euros, this being a competitive price compared to other commercial humidity sensors on the market, such as hygrometers or inductive sensors, which have higher prices [37]. Also, the device used had the advantage of being able to carry out measurements in the variation of the moisture content of the samples from when the gypsum material was poured into the mold once it was kneaded; this presents great industrial advantages since data were obtained from the beginning of the setting of the paste and without the need to unmold the specimens to perform the measurements [28].…”

Section: Arduino Resistive Sensormentioning

confidence: 99%

“…In the field of moisture determination and its application in the building sector, we currently find a wide variety of studies. Some authors have used resistive sensors to better understand the setting processes of cement mortars made with recycled aggregates [28], although the use of this type of sensor to determine soil moisture and build automatic irrigation systems also stands out [29]. There are also studies using capacitive sensors in Arduino, such as the one carried out by Calva et al [30], to determine the moisture content in lands of the Northwest of Brazil with high precision.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Sensors for Determining the Variation in Interior Moisture Content in Gypsum Composite Materials

et al. 2020

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Non-destructive testing can be used to determine some of the most relevant physical properties of building materials. In this work, two low-cost measuring devices were developed capable of determining the variation in real-time of the percentage of humidity that is produced in the construction of gypsum and plaster during the hardening process. For this, an Arduino resistive sensor and a capacitive sensor of our design were used. The results show how it is possible to determine the variations in mixing water content during the seven days of curing established by the UNE-EN 13279-2 standard as well relate to the mechanical resistance of the test specimens with the same percentage of humidity. Additionally, the study was completed with the determination of the formation of the dihydrate compound linked to this setting process in the test specimens by conducting X-ray diffraction and thermogravimetric analysis tests at different ages of the samples.

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“…It was examined that the compressive strength of 28 day cubes increased for FA and SF and decreased for only FA-containing cubes [11]. Te low-cost Arduino-based integrated sensor system can assess the mechanical properties of cement mortar [12]. Besides the conventional techniques of analyzing the heat of hydration, rheology, and sorptivity, several types of research were conducted to determine the hydration process and evaluate the temperature, including the mechanisms of analyzing the hydration rate.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Hydration Mechanisms, Rheological Behavior, and Sorptivity of Portland Cement Pastes Using Low-Cost Arduino Platform-Based Sensors

Katoch

Sikandar

Zamin

et al. 2022

Advances in Materials Science and Engineering

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This study assesses hydration, rheology, and sorptivity of cementitious pastes using relatively low-cost Arduino-based platforms with integrated sensors. The prime objective is to develop a correlation between conventional apparatus-based and Arduino-integrated sensor-based assessment. A total of six samples of cementitious paste were prepared at a room temperature of 26°C, with a w/b ratio of 0.3, containing cement, fly ash, and silica fume. First, the conventional apparatus was employed to assess hydration, rheology, and sorptivity of cementitious mixes. Afterward, a platform arranged for data acquisition, comprising Arduino Mega 2560, a temperature sensor, a soil moisture sensor, and a voltage supply, was used to assess the same properties. The recorded temperature and moisture content data were transmitted using the Android application and the Wi-Fi modem router. A 5-minute moisture analysis test was conducted to monitor the rheological behavior of cementitious mixes. The heat of the hydration mechanism was evaluated for 32 hours using a temperature sensor, enabling continuous and real-time monitoring. Moreover, a sorptivity test on cube samples was performed using shielded self-based apparatus in an adiabatic condition, resulting in relatively long-term monitoring. The microscopic details are analyzed by using a scanning electron microscope (SEM) in conjunction with EDX analysis. Thus, the potential application of the inexpensive sensor-based method is verified.

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Low cost system for measuring the evolution of mechanical properties in cement mortars as a function of mixing water

Cited by 7 publications

References 27 publications

Measuring packing density and water demand of Portland cement and SCMs by the mixing energy method

Measuring packing density and water demand of Portland cement and SCMs by the mixing energy method

Low-Cost Sensors for Determining the Variation in Interior Moisture Content in Gypsum Composite Materials

Assessment of Hydration Mechanisms, Rheological Behavior, and Sorptivity of Portland Cement Pastes Using Low-Cost Arduino Platform-Based Sensors

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