Influence of Barchip fiber on early-age autogenous shrinkage of high strength concrete

Shen, Dejian; Wen, Chuyuan; Zhu, Pengfei; Wu, Yuhua; Yuan, Jiaojiao

doi:10.1016/j.conbuildmat.2020.119223

Cited by 40 publications

(13 citation statements)

References 57 publications

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“…This relationship has been verified by many other studies. Simple correlations (linear or exponential) can be used to estimate the compressive strength [43][44][45][46][47]. The results of this experiment also show an exponential regression relationship between compressive strength and UPV.…”

Section: Effect Of Lf and Bfs On Asmentioning

confidence: 79%

The Hydration, Mechanical, Autogenous Shrinkage, Durability, and Sustainability Properties of Cement–Limestone–Slag Ternary Composites

2021

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This study examines the hydration–mechanical–autogenous shrinkage–durability–sustainability properties of ternary composites with limestone filler (LF) and ground-granulated blast furnace slag (BFS). Four mixtures were prepared with a water/binder ratio of 0.3 and different replacement ratios varying from 0 to 45%. Multiple experimental studies were performed at various ages. The experimental results are summarized as follows: (1) As the replacement levels increased, compressive strength and autogenous shrinkage (AS) decreased, and this relationship was linear. (2) As the replacement levels increased, cumulative hydration heat decreased. At the age of 3 and 7 days, there was a linear relationship between compressive strength and cumulative hydration heat. (3) Out of all mixtures, the ultrasonic pulse velocity (UPV) and electrical resistivity exhibited a rapid increase in the early stages and tended to slow down in the latter stages. There was a crossover of UPV among various specimens. In the later stages, the electrical resistivity of ternary composite specimens was higher than plain specimens. (4) X-ray diffraction (XRD) results showed that LF and BFS have a synergistic effect. (5) With increasing replacement ratios, the CO2 emissions per unit strength reduced, indicating the sustainability of ternary composites.

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Section: Effect Of Lf and Bfs On Asmentioning

confidence: 79%

The Hydration, Mechanical, Autogenous Shrinkage, Durability, and Sustainability Properties of Cement–Limestone–Slag Ternary Composites

2021

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“…According to the Kelvin-Laplace equation [41], The steam-cured concrete shrinkage model is shown in Equation (16).…”

Section: Relationship Between Shrinkage and Relative Humidity Of Steamentioning

confidence: 99%

“…The cracks caused by shrinkage will reduce the durability of concrete and reduce the safety, reliability and service life of buildings, especially for buildings with large surface area and long-term exposure to the external environment. In recent years, the autogenous shrinkage and drying shrinkage deformation of concrete have become popular research topics [ 16 , 17 , 18 ]. Most researchers study drying shrinkage and autogenous shrinkage, respectively.…”

Section: Introductionmentioning

confidence: 99%

Volume Deformation of Steam-Cured Concrete with Slag during and after Steam Curing

Han

et al. 2021

Materials

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In order to better predict the development of shrinkage deformation of steam-cured concrete mixed with slag, a deformation-temperature-humidity integrated model test, a hydration heat test, and an elastic modulus test were performed. The effects of the steam-curing process and the content of slag on shrinkage deformation, hydration degree and elastic modulus of concrete were studied. The results indicate that during the steam-curing process, the concrete has an “expansion-shrinkage” pattern. After the steam curing, the deformation of concrete is dominated by drying shrinkage. After the addition of slag, the shrinkage deformation of steam-cured concrete is increased. The autogenous shrinkage increases by 0.5–12%, and the total shrinkage increases by 1.5–8% at 60 days. At the same time, slag reduces the hydration degree of steam-cured concrete and modulus of elasticity. A prediction model for the hydration degree of steam-cured concrete is established, which can be used to calculate the degree of hydration at any curing age. Based on the capillary tension generated by the capillary pores in concrete, an integrated model of autogenous shrinkage and total shrinkage is established with the relative humidity directly related to the water loss in the concrete as the driving parameter. Whether the shrinkage deformation is caused by hydration reaction or the external environment, this model can better predict the shrinkage deformation of steam-cured concrete.

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“…The shrinkage of concrete is one of the main causes of structural cracking [ 51 ]. The CA can restrain the shrinkage of concrete [ 52 , 53 ]. Creep is one of the important indices for the long-term performance of concrete.…”

Section: Long-term Behavior Experimentsmentioning

confidence: 99%

Strength and Durability Properties of Antimony Tailing Coarse Aggregate (ATCA) Concrete

Wang

Zhang

et al. 2021

Materials

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Antimony (Sb) is a trace element applied widely in modern industry. A large number of tailing solid wastes are left and accumulated in the mining area after purifying the precious antimony from the antimony ores, causing serious pollution to the environment. The major aim of this study is to investigate the feasibility of utilizing antimony tailing coarse aggregate (ATCA) as a complete substitute for natural coarse aggregate (NCA) in high-strength concrete. Concrete specimens with 25%, 50%, 75%, and 100% ATCA replacing the NCA in conventional concrete were prepared for evaluating the performance of ATCA concrete. The investigators find that ATCA concrete has good workability, and the mechanical properties and long-term behavior (shrinkage and creep) of ATCA concrete with all replacement levels are superior to those of NCA concrete. The durability indices of ATCA concrete, such as the frost-resistant, chloride permeability, and resistance to carbonation, are better than those of NCA concrete. While the alkali activity and cracking sensitivity behavior of ATCA concrete seem to be decreased, nevertheless, the difference is not significant and can be neglected. The researchers demonstrate that all of the control indices of ATCA concrete meet the requirements of the current industry standards of China. Overall, ATCA can be used in concrete to minimize environmental problems and natural resources depletion.

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Influence of Barchip fiber on early-age autogenous shrinkage of high strength concrete

Cited by 40 publications

References 57 publications

The Hydration, Mechanical, Autogenous Shrinkage, Durability, and Sustainability Properties of Cement–Limestone–Slag Ternary Composites

The Hydration, Mechanical, Autogenous Shrinkage, Durability, and Sustainability Properties of Cement–Limestone–Slag Ternary Composites

Volume Deformation of Steam-Cured Concrete with Slag during and after Steam Curing

Strength and Durability Properties of Antimony Tailing Coarse Aggregate (ATCA) Concrete

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