Laboratory investigation on early-age shrinkage cracking behavior of partially continuous reinforced concrete pavement

Liu, Kaixiang; Zhang, Xiao; Wang, Yongbao; Han, Shujie; Luo, Zhili; Hao, Jiahang; Zhang, Jiacheng

doi:10.1016/j.conbuildmat.2023.131125

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…0:00 h, 6:00 h, 12:00 calculation results are shown in Figures 21-24 According to the analysis in Figures 21-24, the relative humidit concrete pavement slab exhibited a significant difference in the first 4 ence gradually weakened as time went on. The characteristics of early midity and the humidity difference curve included the following aspe (1) The fluctuation laws of the relative humidity curve at the top o at different paving times was the same, and the difference between the on the time axis was the same as the difference at the paving time, t humidity curve at the top of each slab fluctuated cyclically for 24 h fro (2) After 24 h of paving at different times, the humidity at the top a downward trend, with the maximum decline in the relative humidi when paving at 00:00, with an amplitude of 1.541%. At 18:00, the decr paving relative humidity curve was the smallest, with an amplitude of Compared to the environmental humidity in Figure 21, after the c ing at the time of 0, the slab humidity was in a saturated state, which than environmental humidity.…”

Section: Effect Of Paving Timementioning

confidence: 99%

“…The early performance of cement concrete pavement slabs during the construction phase is significantly affected by the external temperature field. Under the impact of a certain temperature and humidity field, the pavement slabs could crack due to excessive shrinkage stress and are extremely prone to the occurrence of early construction defects during the construction stage [ 1 ]. Thus, how to avoid early defects and ensure quality has been a key challenge for airport pavement slab engineering.…”

Section: Introductionmentioning

confidence: 99%

“…The temperature difference and its impact on cement concrete pavement have been studied extensively [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. In the code for design of pavement slab in China, the influence of temperature difference has also been taken into account regarding the design and calculation of pavement slabs through empirical values in different regions.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Evolution Behavior of Humidity Fields in Cement Concrete Pavements of a Coastal Airport During Early Stages in Humid and Hot Areas

2023

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Airport pavements are prone to early defects during the construction phase, and their early performance during the construction phase is significantly affected by the external temperature field. This article takes the concrete pavement of Xiamen Xiang’an New Airport as an example and uses a three-dimensional (3D) humidity simulation program for cement concrete pavement to study the evolution behavior of the early stage humidity field of the pavement in a humid and hot climate environment. The results indicate that the evolution law of the humidity field of the concrete pavement slab was consistent with the environmental field, presenting a 24 h periodic variation. The environmental field had a significant impact on the humidity of the surface layer of the pavement slab, and the humidity decreased rapidly with time. There was a humidity gradient on both the horizontal plane and the cutting plane of the slab, the horizontal humidity was concentrated from the boundary into the middle of the slab, and the sectional humidity was concentrated from the top to the bottom of the slab. Environmental parameters, construction parameters, and material and structural parameters all influenced humidity through humidity exchange or by changing the saturated vapor pressure inside the slab. The humidity field was most sensitive to environmental humidity and maintenance methods, but less sensitive to material parameters and structural parameters. Through analysis, it is advisable to avoid hot seasons, choose periods of increased environmental humidity, adopt appropriate maintenance methods during construction to reduce humidity stress on the slab, and therefore decrease early stage deterioration and improve service life.

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Section: Effect Of Paving Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%