Hydration and microstructural characterization of early-age cement paste with ultrasonic wave velocity and electrical resistivity measurements

Yim, Hong Jae; Bae, Young Hwan; Jun, Yubin

doi:10.1016/j.conbuildmat.2021.124508

Cited by 46 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As far as UPV is concerned, Figure 4 shows an increase in UPV during setting for all mixtures. This behavior has been previously observed by several researchers [3], [9], [12]- [17]. At very early-ages, ultrasonic waves propagate into a viscous suspension, at low UPV values.…”

Section: Ultrasonic Waveformssupporting

confidence: 82%

Ultrasound monitoring of setting behavior of concrete mixtures

Bressan

Carraro

Pinto

2023

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

The setting behavior of concrete mixtures can be indirectly monitored by the penetration resistance test given by ASTM C 403. Arbitrary values of penetration resistance are associated to the initial and final set times. This test is carried out on the previously sieved mortar portion of the concrete mixture, which makes its practical use rare. Alternatively, ultrasound testing can be used to characterize this transition period, since the propagation of ultrasonic waves is greatly affected by the formation of cement hydration products and the extent of microstructure development. In this research, the propagation of ultrasonic waves in fresh concrete during the setting period was studied. In addition to the ultrasonic pulse velocity (UPV), other ultrasonic parameters such as group velocity, parameters related to ultrasonic energy and frequency were monitored during the setting period of various concrete mixes. It was observed that as setting progressed, there was a greater ease of ultrasonic transmission with a continuous increase of wave amplitudes. The results indicated that a combined analysis of the time domain parameters of UPV, group velocity and the time that 10% of energy has propagated (t10) could be used to improve the characterization of the microstructure development regarding the setting behavior of concrete mixtures.

show abstract

Section: Ultrasonic Waveformssupporting

confidence: 82%

Ultrasound monitoring of setting behavior of concrete mixtures

Bressan

Carraro

Pinto

2023

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

show abstract

“…The increased point can be defined as the rising time of electrical resistivity. A previous study identified that the initial value of electrical resistivity is determined by the initial water content and its dispersed solid particles in a fresh cementitious mixture, and the rising time of electrical resistivity as a non-destructive parameter reflects the time of the depercolated water-filled pore network [21]. This nondestructive parameter can be used as a setting time indicator based on microstructural changes owing to the generation of specific hydrates.…”

Section: Electrical Resistivitymentioning

confidence: 99%

“…Among them, nondestructive evaluation methods using ultrasonic wave propagation characteristics (e.g., ultrasonic wave velocity) [16,17] and electrical properties (e.g., electrical resistivity and impedance) [15,[18][19][20] have been proposed for the phase change monitoring of cement-based materials, including solid percolation and water depercolation [21]. Previous studies investigated the effect of various materials composed of different mix proportions and admixtures; however, a nondestructive approach for setting and hardening evaluation in fresh-state CSA cement mixtures and the investigation of their physicochemical changes have not been reported.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Evaluation for Hydration and Setting Time of Gypsum Modified Calcium Sulfoaluminate Cement Paste

et al. 2023

Self Cite

View full text Add to dashboard Cite

Calcium sulfoaluminate (CSA) cement is a promising solution for reducing CO2 emissions. While previous studies have attempted to investigate the usefulness of CSA cement via various approaches, early age nondestructive evaluations for the setting and hydration of CSA cement mixtures have not been reported. In this study, we measured the ultrasonic pulse velocity and electrical resistivity of early age CSA cement paste. Six types of samples were prepared according to different water-to-solid ratios and different amounts of gypsum. In addition, various microstructural analyses were performed to understand CSA cement hydration with the obtained nondestructive parameters. Consequently, the effect of added gypsum in CSA cement paste was discussed in terms of ye’elimite dissolution and the precipitation of ettringite, and different pore distributions produced by added gypsum were discussed in terms of compressive strength. The 5% addition of gypsum in CSA cement paste enhanced the hydration evolution, such as ettringite, and it can induce the faster setting time up to 6 h and strength development during 24 h.

show abstract

“…Then the possible electrical resistivity distribution can be calculated by the inversion program (Supandi 2021). There are different types of imaging by high-density resistivity method, for example, the electrodes were inserted in the samples (An et al 2020;Yim et al 2021), which will produce irreversible damage to the samples.…”

Section: Electrical Resistivity Measurement Of Samplesmentioning

confidence: 99%

Investigation of capillary water migration in the sandstone block based on electrical resistivity measurements

Yang

Chen

Zhao³

et al. 2022

Preprint

View full text Add to dashboard Cite

Capillary water migration observed in sandstone block seriously affects pore structure and mechanical properties under the influence of the natural environment. In addition to continuous capillary action, the salt solution will be crystallized in the pores under the dry-wet cycles, and thereby deterioration occurs on the surface. To investigate the spatial and temporal evolution of material structure, a series of capillary water absorption tests were carried out on sandstone samples. Furthermore, stereo microscope and high-density resistivity instrument were conducted to monitor the characteristics of the surface and internal pores at intervals. Meanwhile, a novel Terzaghi model was proposed for modeling the variation trend of capillary water rise over time, in which the variation in porosity were characterized by saturated degree. The electrical resistivity measurements in millimeter-scale show that the rising trend of the dry-wet interface resembles the saddle shape. Moreover, the soluble salt is more enriched near the dry-wet interface under the capillary action due to the slow rise of the salt solution when it reaches the dry-wet interface. With the increase of dry-wet cycles, an obvious salt layer appeared on the surface accompanied by sandstone block crisp and pulverized phenomena, and significantly increased the capillary water absorption rate and porosity. In detail, the maximum mass loss due to mineral detachment of the surface reaches 2% in a single dry-wet cycle. Additionally, the study provides some references for evaluating the capillary action and deterioration mechanism of similar porous media materials by using a rapid and nondestructive method.

show abstract

Hydration and microstructural characterization of early-age cement paste with ultrasonic wave velocity and electrical resistivity measurements

Cited by 46 publications

References 30 publications

Ultrasound monitoring of setting behavior of concrete mixtures

Ultrasound monitoring of setting behavior of concrete mixtures

Nondestructive Evaluation for Hydration and Setting Time of Gypsum Modified Calcium Sulfoaluminate Cement Paste

Investigation of capillary water migration in the sandstone block based on electrical resistivity measurements

Contact Info

Product

Resources

About