Applicability of the Modified Nurse-Saul (MNS) maturity function for estimating the effect of temperature on the compressive strength of GGBS concretes

Soutsos, Marios; Kanavaris, Fragkoulis

doi:10.1016/j.conbuildmat.2023.131250

Cited by 4 publications

(4 citation statements)

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“…The classic maturity theory can be used to predict the strength of concrete. Some researchers established the relationship between concrete strength and maturity by defining the total temperature over a certain period as maturity [34]. Others subsequently proposed an equivalent-age calculation method based on the Arrhenius function.…”

Section: Equivalent Age-compressive Strength Model Of Mrcmentioning

confidence: 99%

“…Steam-curing of concrete is a complicated humidity-and temperature-coupling environment [24,35]. In addition to curing temperature and time, humidity also affects the strength of concrete [34,36]. Most maturity-strength calculation models are based on water curing or a 100% relative humidity environment [37].…”

Section: Equivalent Age-compressive Strength Model Of Mrcmentioning

confidence: 99%

“…Differences in the curing temperature and W/B ratio can lead to reduced ultimate strength of high temperature cured concrete [34]. In Table 4, the ultimate strength for each W/B ratio decreases with an increase in temperature.…”

Section: Equivalent Age-compressive Strength Model Of Mrcmentioning

confidence: 99%

“…For MRC with a W/B ratio of 0.46 and 0.42 at a curing temperature of 40-70 • C, the error of the predicted value of the model for each age is within 5%, indicating good applicability. Differences in the curing temperature and W/B ratio can lead to reduced u strength of high temperature cured concrete [34]. In Table 4, the ultimate strength f W/B ratio decreases with an increase in temperature.…”

Section: Equivalent Age-compressive Strength Model Of Mrcmentioning

confidence: 99%

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Effects of Manufactured Sand and Steam-Curing Temperature on the Compressive Strength of Recycled Concrete with Different Water/Binder Ratios

Liu,

Wang,

Zhang

et al. 2023

Materials

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New building materials (manufactured sand and recycled coarse aggregates) can conserve raw materials and protect the environment. Prefabricated members can shorten the construction time of a structure. To use manufactured sand and recycled coarse aggregate in the preparation of precast member concrete, an economical and practical steam-curing scheme must be developed such that the compressive strength of precast manufactured sand recycled concrete (MRC) meets the requirements for hoisting. The effects of different steam-curing temperatures (standard curing, 40 °C, 50 °C, 60 °C, 70 °C, and 80 °C) on the compressive strength of MRC with three water/binder ratios (W/B) (0.46, 0.42, and 0.38) were studied. In addition, the microstructure of MRC was examined using a scanning electron microscope. The equivalent age–compressive strength model was used to estimate the recycled concrete with manufactured sand. The results showed that the strength of MRC with a water–cement ratio of 0.46, 0.42, and 0.38 reached 33.9, 38.7, and 45.1 MPa, respectively, after 28 days of standard curing. The results also indicated that an increase in the steam-curing temperature had a positive effect on the early compressive strength of MRC and a negative effect on the 28 d compressive strength. This behavior was more obvious for MRC with a low W/B ratio. For MRC with a W/B of 0.46, 0.42, and 0.38, after steam-curing for 6 h, the compressive strength reached 32–65%, 36–70%, and 40–77% of the design strength, respectively. The optimum steam-curing temperatures for MRC with W/B of 0.46, 0.42, and 0.38 were 60 °C, 60 °C, and 50 °C. A decrease in W/B has a negative impact on the accuracy of MRC estimation using the equivalent age–compressive strength model. The maximum deviation of the prediction was within 10%, and the accuracy of the model was acceptable. This study provides a useful reference for the production of prefabricated MRC components in factories and subsequent construction.

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Section: Equivalent Age-compressive Strength Model Of Mrcmentioning

confidence: 99%