Autogenous shrinkage of high performance concrete: A review

Wu, Liqun; Farzadnia, Nima; Shi, Caijun; Zhang, Zuhua; Wang, Hao

doi:10.1016/j.conbuildmat.2017.05.064

Cited by 294 publications

(90 citation statements)

References 79 publications

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“…The test results of autogenous shrinkage of specimens are exhibited in Table 6 and Figure 6, and the growth of expansive deformation is displayed in Figure 7, of which the negative and positive values of Y-axis are the expansive and shrinkage deformation, respectively. In general, the autogenous shrinkage grew rapidly within the first month and then developed slowly and tended to be steady [11,20,45]. The SCC had a highest autogenous shrinkage due to no expansive agent admixed, and the SF0 had a lowest autogenous shrinkage due to the free development of expansive deformation.…”

Section: Autogenous Shrinkage Of Hardened Self-compacting Sfrcmentioning

confidence: 94%

“…Ding et al [17,18] proposed a method to get a result of indirect reduction of the coarse-aggregate content by regarding steel fibers as coarse-aggregates, of which the binders' content and sand ratio were increased with the volume fraction of steel fiber. However, with the premise of ensuring the workability of a fresh mixture by adjusting mix proportion, the hardened self-compacting SFRC faces a problem of great shrinkage compared with SCC due to the content of cementitious materials increased with the volume fraction of steel fiber [16][17][18][19][20]. An experimental study exhibited that to keep the diameter of slump-flow at 600 mm for the self-compacting SFRC with the v f of hooked-end steel fiber (circular section, l f = 30 mm, d f = 0.5 mm) increased from 0% to 1.4%, the binders content was increased by 16.3% and the dosage of coarse-aggregate was reduced by 35%.…”

Section: Introductionmentioning

confidence: 99%

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Shrinkage and Mechanical Properties of Self-Compacting SFRC With Calcium-Sulfoaluminate Expansive Agent

Shang

et al. 2020

Materials

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With the premise of ensuring workability on a fresh mixture, the volume stability of hardened self-compacting steel fiber reinforced concrete (SFRC) becomes an issue due to the content of cementitious materials increased with the volume fraction of steel fiber. By using the expansive agent to reduce the shrinkage deformation of self-compacting SFRC, the strength reduction of hardened self-compacting SFRC is another issue. To solve these issues, this paper performed an experimental investigation on the workability, shrinkage, and mechanical properties of self-compacting SFRC compared to the self-compacting concrete (SCC) with or without an expansive agent. The calcium-sulfoaluminate expansive agent with content optimized to be 10% mass of binders and the steel fiber with a varying volume fraction from 0.4% to 1.2% were selected as the main parameters. The mix proportion of self-compacting SFRC with expansive agent was designed by the direct absolute volume method, of which the steel fibers are considered to be the distributed coarse aggregates. Results showed that rational high filling and passing ability of fresh self-compacting SFRC was ensured by increasing the binder to coarse-aggregate ratio and the sand ratio in the mix proportions; the autogenous and drying shrinkages of hardened self-compacting SFRC reduced by 22.2% to 3.2% and by 18.5% to 7.3% compared to those of the SCC without expansive agent at a curing age of 180 d, although the expansion effect of expansive agent decreased with the increasing volume fraction of steel fiber; the mechanical properties, including the compressive strength, the splitting tensile strength, and the modulus of elasticity increased with the incorporation of an expansive agent and steel fibers, which met the design requirements.

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Section: Autogenous Shrinkage Of Hardened Self-compacting Sfrcmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Shrinkage and Mechanical Properties of Self-Compacting SFRC With Calcium-Sulfoaluminate Expansive Agent

Shang

et al. 2020

Materials

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“…The strength and durability of cementitious structures are important as they define the service life of the structure but cracking of concrete due to shrinkage effects durability [22]. The part of shrinkage that does not include any change in volume due to ingress or loss of substances, variation of temperature, external force application and restraint could be called as autogenous shrinkage [23]. Usually early-stage autogenous shrinkage occurs within the first 24 hours after mixing with water [23].…”

Section: Introductionmentioning

confidence: 99%

“…The part of shrinkage that does not include any change in volume due to ingress or loss of substances, variation of temperature, external force application and restraint could be called as autogenous shrinkage [23]. Usually early-stage autogenous shrinkage occurs within the first 24 hours after mixing with water [23]. The cementitious matrix is more prone to cracking during the first 12 hours after casting [24].…”

Section: Introductionmentioning

confidence: 99%

Effects of Wet Separated and High Speed Milling Fly Ash Added in High Volume to Cementitious Materials

Haider

Alit²,

Bittnar

et al. 2020

Period. Polytech. Civil Eng.

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In this research high speed milling was carried out on particles of brown coal raw fly ash, on second layer, and on third layer particles obtained from wet separation of brown coal raw fly ash. Due to milling process, median particle size d50 of raw fly ash, second layer, and third layer reduced by 46 %, 23 %, and 77 %, densities reduced by 11 %, 17 %, and 8 % respectively. Due to milling process, formation of agglomerations was observed, the standard deviation of the chemical composition of each element from the mean value reduced. After milling, high volume cementitious paste mixes were prepared with 60 % cement replacement. Due to the milling process the increase in compressive strength at 28 and 90 days was observed for raw fly ash is 59 % and 16 %, for second layer is 12 % and 15 %, for third layer and milled third layer is 78 % and 75 %. Flexural strength testing showed that due to the milling process the deflections at maximum loads have reduced considerably leading to brittle behavior of milled cementitious specimens. The testing for Mercury Intrusion Porosimetry showed that the cementitious specimens of third layer have maximum concentration of large capillary pores between 0.05 and 10 µm, whereas, all others have maximum concentration of medium capillary pores between 0.01 and 0.05 µm. Autogenous shrinkage of cementitious specimens was measured for first sixteen hours after mixing which showed that the second layer particles have the least shrinkage as compared to all other specimens.

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“…Furthermore, there is a lack of the investigation about a comparison between FA and GGBS on the action effect on the compressive strength and shrinkage property. In addition, plastic and drying shrinkage of concrete occur in two different stages: early (within the first 24 hr) and later (beyond 24 hr) stages, respectively, that is to say, it could not guarantee the harm of one shrinkage is reduced, when the ability to resist another shrinkage is improved. Therefore, it is necessary to obtain an optimal content level of the two admixtures, which could improve the ability of concrete to resist dry shrinkage and plastic shrinkage at the same time, and the research results can also provide a basis for engineering construction.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the compressive strength and shrinkage of concrete containing fly ash and ground granulated blast‐furnace slag

Zhang

2019

Structural Concrete

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This paper presents an experimental investigation on the compressive strength and shrinkage (drying shrinkage and plastic shrinkage) property of concrete specimens with fly ash (FA) and ground granulated blast-furnace slag (GGBS), and moreover, the content level and curing age were considered in this experiment. The resultsshow that the addition of FA and GGBS has a significant effect on the compressive strength and shrinkage properties of concrete. It indicated that the compressive strength of specimens decreases gradually due to the reduction of cement hydration products, when the curing age is less than 14 days. Nevertheless, once the curing time exceeds 7 days, the compressive strength increases initially and then decreases. Similarly, the compressive strength of concrete with GGBS increases slightly at first and then decreases, when the content level exceeds the critical value. The variety rule of plastic shrinkage cracks with FA and GGBS is similar to that of compressive strength; however, the variety rule of drying shrinkage strain is contrary to the above experimental results. Furthermore, in the early stage of curing, the GGBS is the main factor on improving strength and drying shrinkage properties, though for the later stage, the FA becomes the main factor instead of GGBS. K E Y W O R D S compressive strength, drying shrinkage, fly ash, ground granulated blast-furnace slag, plastic shrinkage

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Autogenous shrinkage of high performance concrete: A review

Cited by 294 publications

References 79 publications

Shrinkage and Mechanical Properties of Self-Compacting SFRC With Calcium-Sulfoaluminate Expansive Agent

Shrinkage and Mechanical Properties of Self-Compacting SFRC With Calcium-Sulfoaluminate Expansive Agent

Effects of Wet Separated and High Speed Milling Fly Ash Added in High Volume to Cementitious Materials

Experimental study on the compressive strength and shrinkage of concrete containing fly ash and ground granulated blast‐furnace slag

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