Analysis and Modelling of Shrinkage and Creep of Reactive Powder Concrete

Pang, Chao; Zheng, Wenzhong; Wang, Ying; Chang, Wei

doi:10.3390/app8050732

Cited by 20 publications

(14 citation statements)

References 32 publications

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“…In analysing the results presented in this paper, as well as the most recent literature in the field of 3D concrete printing, it would be prudent to consider future possible research avenues regarding deformations in production materials, as well as to analyse methods of predicting shrinkage in 3DCP [52,53]. The research shows the influence of the types of curing method on the shrinkage of 3D-printed concrete.…”

Section: Future Workmentioning

confidence: 95%

Effect of Curing Methods on Shrinkage Development in 3D-Printed Concrete

et al. 2020

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Technological developments in construction have led to an increase in the use of 3D modelling using CAD environments. The popularity of this approach has increased in tandem with developments in industry branches which use 3D printers to print concrete based printing materials in construction, as these allow freedom in shaping the dimensions of supporting elements. One of the biggest challenges for researchers working on this highly innovative technology is that of cement material shrinkage. This article presents the findings of research on an original method of measuring deformations caused by shrinkage in 3D-printed concrete elements. It also discusses the results of tests on base mixes, as well as comparisons between the influence of internal and external curing methods on the development of deformations and their final outcomes. Furthermore, the article discusses differences between deformations formed after seven days of hardening without curing, with those which occur when two common, traditional concrete curing methods are used: foil insulation and shrinkage reducing admixtures. In addition, the article examines the effects of internal curing on the 1, 7, 14, 21 and 28 day mechanical properties of concrete, in accordance with EN 196-1 and EN 12390-2. Studies have shown that the optimal amount of shrinkage reducing admixtures is 4% (in relation to the mass of cement), resulting in a reduction in total shrinkage of 23%. The use of a shrinkage reducing admixture in 3D-printed concrete does not affect their strength after 28 days, but slows the strength development during the first 7 days.

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Section: Future Workmentioning

confidence: 95%

Effect of Curing Methods on Shrinkage Development in 3D-Printed Concrete

et al. 2020

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“…There are different models and equations to account for and predict shrinkage in concrete and similar cementitious systems. The most common ones include the ACI 209-82 model [83,84], CEB-FIP model [85], and B3 model [85][86][87]. Generally, shrinkage is associated with the drying of the surface as a result of evaporation and bleeding, which increase pore pressure and the radius menisci which induces stresses in the pore.…”

Section: Materials Drying and Curingmentioning

confidence: 99%

From analytical methods to numerical simulations: A process engineering toolbox for 3D concrete printing

Perrot

Alexandre

Nerella

et al. 2021

Cement and Concrete Composites

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“…Chen et al [9] performed an analysis and modelling of the shrinkage and creep of reactive powder concrete (RPC) with various steel fiber contents. It was revealed that the compressive strength and modulus of elasticity increased with increasing steel fiber content, contrary to shrinkage and creep.…”

Section: Long-term Behavior Of Recycled Aggregate Concretementioning

confidence: 99%