Moisture measurement in concrete

Hundt, J.; Buschmann, Johanna

doi:10.1007/bf02478952

Cited by 4 publications

(3 citation statements)

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“…The gravimetric method is the most dependable and accurate technique for measuring moisture in concrete, especially when representative samples can be collected from the body under investigation. However, the destructive nature of the test renders it unsuitable in some circumstances [ 46 ]. Some other relevant methods are itemized in Table 1 , but most of these methods do not measure moisture in concrete directly, thus limiting their use.…”

Section: Moisture In Concretementioning

confidence: 99%

Alkali–Silica Reactions: Literature Review on the Influence of Moisture and Temperature and the Knowledge Gap

Olajide,

Nokken,

Sanchez

2023

Materials

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The alkali–silica reaction is a universally known destructive mechanism in concrete that can lead to the premature loss of serviceability in affected structures. Quite an enormous number of research studies have been carried out focusing on the mechanisms involved as well as the mitigation and prevention of the reaction. A few in-depth discussions on the role of moisture and temperature exist in the literature. Nevertheless, moisture and temperature have been confirmed to play a vital role in the reaction. However, critical assessments of their influence on ASR-induced damage are limited. The available moisture in concrete needed to initiate and sustain the reaction has been predominantly quantified with the relative humidity as a result of difficulties in the use of other media, like the degree of capillary saturation, which is more scientific. This paper discussed the current state of understanding of moisture measurement in concrete, the role of moisture and temperature in the kinetics of the reaction, as well as the moisture threshold needed for the reaction. Furthermore, the influence of these exposure conditions on the internal damage caused by ASR-induced deterioration was discussed.

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Section: Moisture In Concretementioning

confidence: 99%

Alkali–Silica Reactions: Literature Review on the Influence of Moisture and Temperature and the Knowledge Gap

Olajide,

Nokken,

Sanchez

2023

Materials

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“…From signal value of 0 h and saturated state, the water content Θ s (γ) in the saturated state of each test group was calculated. The capillary water absorption coefficient S of each group and the water content Θ s (γ) in the saturated state of each group were substituted into Equation (13) to obtain s. Subsequently, the D 0 of the exponential function and power function were obtained using Equations ( 15) and (17), respectively (see Table 5).…”

Section: Nmr Saturation Test Analysismentioning

confidence: 99%

“…Wormald and Britch were the first to evaluate the moisture content in construction materials using neutron and gamma-ray diffraction [9]. Subsequently, accurate and non-destructive experimental methods, such as the hygrometer method [10], wave propagation [11][12][13], thermal transmittance testing [14][15][16], electrical property testing methods [17,18], and nuclear magnetic resonance (NMR) [19][20][21][22], have gradually been developed. However, each of these methods has its own disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Nano-SiO2 and Waterproofing Agent on the Water Transportation Process in Mortar Using NMR

et al. 2020

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Moisture diffusion in cement-based materials significantly impacts its durability. In this study, we analyzed the effect of adding a waterproofing agent and nano-SiO2 (NS) on the water transportation process in mortar using capillary water absorption tests and nuclear magnetic resonance (NMR) technology. The results indicate that the combined action of the waterproofing agent and nano-SiO2 drastically reduce the capillary water absorption coefficient and have a more significant impact than only adding the waterproofing agent. The moisture diffusion in different sections of the mortar during the water absorption process is obtained from the NMR test results and two function models. Comparative studies indicate that the NMR test results have good correlation with the capillary water absorption test results and provide accurate process data. The NMR analysis results offer a new analytical method to characterize the porosity of cement-based materials by continuously monitoring small-pitch sections.

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