Effects of redispersible polymer powders on the structural build-up of 3D printing cement paste with and without hydroxypropyl methylcellulose

Zhang, Yi; Jiang, Zhengwu; Zhu, Yan; Zhang, Jie; Ren, Qiang; Huang, Tao

doi:10.1016/j.conbuildmat.2020.120551

Cited by 58 publications

(21 citation statements)

References 49 publications

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“…Meanwhile, it is well acknowledged that it is the excess paste that contributes to the workability of cement-based materials given that it forms lubricating layer surrounding each particle [20][21][22]. Similar results were found that water film thickness [23][24][25], paste film thickness [26,27] and mortar film thickness [28,29] influence the rheology and workability of paste, mortar and concrete respectively. More precisely, the yield stress of mortars decreases exponentially with the increase of paste film thickness [28].…”

Section: Introductionmentioning

confidence: 62%

Plastic viscosity of cement mortar with manufactured sand as influenced by geometric features and particle size

Ren

Tao

Jiao

et al. 2021

Cement and Concrete Composites

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Section: Introductionmentioning

confidence: 62%

Plastic viscosity of cement mortar with manufactured sand as influenced by geometric features and particle size

Ren

Tao

Jiao

et al. 2021

Cement and Concrete Composites

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“…With regard to structural build-up a variety of accelerators were investigated for cementitious matrices with 0.15 wt% PCE and nanosilica (Yuan et al 2020), whereby Mg(NO 3 ) 2 was identified as the most effective one. Comparing re-dispersible polymer powders based on polyvinyl acetate-ethylene (VAE) and polyvinyl acetate-vinyl versatate-ethylene showed an increase of the structural build-up rate for VAE with lower ethylene content (Zhang et al 2020). Le et al applied for high-performance fibrereinforced concrete with 1 wt% PCE 0.5 wt% retarder based on amino-tris(methylenephosphonic acid), citric acid and formaldehyde to meet optimized workability and printing time (Le et al 2012a, b).…”

Section: Polymeric Admixtures In 3d Printable Cementitious Matricesmentioning

confidence: 99%

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

et al. 2021

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Additive manufacturing (AM), also referred as 3D printing, is a technology that enables building automated three-dimensional objects in a layer-by-layer manner. AM of cement-based and alkali-activated composites has gathered attention over the last decade and is one of the most rapidly developing civil engineering fields. Development of proper mixture compositions which are suitable in fresh and hardened state is one of the key challenges of AM technology in construction. As the behaviour of cement-based materials (CBM) and alkali-activated materials (AAM) is determined by chemical and physical processes at the nano-level, incorporation of nano- and micro-sized admixtures has great influence on the performance of printable composites. These modifications are attributed to the unique reactivity of nanoparticles associated with their small size and large surface area. This review paper summarizes recent developments in the application of nano- and micro-particles on 3D printable cementitious composites and how they influence the performance of 3D-printed construction materials. The research progress on nano-engineered CBM and AAM is reviewed from the view of fresh and hardened properties. Moreover, comparison between nano- and micro-sized admixtures including nanosilica, graphene-based materials, and clay nanoparticles as well as chemical admixtures such as viscosity-modifying admixtures and superplasticizers is presented. Finally, the existing problems in current research and future perspectives are summarized. This review provides useful recommendations toward the significant influence of nano- and micro-sized admixtures on the performance of 3D printable CBMs.

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“…PEVA holds the features of moisture-proof, corrosion resistance, and flexibility, and therefore it is widely used as the substrate for various nanostructures. [31,32] Here, the PEVA-C nanofiber composite interface layers were prepared on the carbon cloth by using the electrospinning method at the voltage of 25 kV and flow rate of 2.5 mL h −1 (Figure 1). The thermogravimetric analysis shows that the carbon contents in the PEVA matrix are 3.…”

Section: Resultsmentioning

confidence: 99%

“…PEVA holds the features of moisture‐proof, corrosion resistance, and flexibility, and therefore it is widely used as the substrate for various nanostructures. [ 31,32 ] Here, the PEVA‐C nanofiber composite interface layers were prepared on the carbon cloth by using the electrospinning method at the voltage of 25 kV and flow rate of 2.5 mL h −1 ( Figure ). The thermogravimetric analysis shows that the carbon contents in the PEVA matrix are 3.4 wt% (PEVA‐C‐3.4), 10.4 wt% (PEVA‐C‐10.4), and 18.7 wt% (PEVA‐C‐18.7), and the resistances of PEVA‐C‐3.4, PEVA‐C‐10.4, and PEVA‐C‐18.7 are 0.238, 0.216, and 0.243 Ω, respectively (Figure S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Nanofiber Composite for Improved Water Retention and Dendrites Suppression in Flexible Zinc‐Air Batteries

Chen

Xing

et al. 2021

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Water loss of the gel polymer electrolytes (GPEs) and dendrites growth on Zn anode are overriding obstacles to applying flexible zinc‐air batteries (ZABs) for wearable electronic devices. Nearly all previous efforts aim at developing novel GPEs with enhanced water retention and therefore elongate their lifespan. Herein, a facile interface engineering strategy is proposed to retard the water loss of GPE from the half‐open structured air cathode. In detail, the poly(ethylene vinyl acetate)/carbon powder (PEVA‐C) nanofiber composite interface layer with features of hydrophobicity, high conductivity, air permeability, and flexibility are prepared on the carbon cloth and set up between the GPE and electrode. The as‐assembled ZAB with simple alkaline PVA GPE exhibits an impressive cycle life of 230 h, which outperforms ZAB without the PEVA‐C nanofibers interface layer by 14 times. Additionally, the growth of Zn dendrites can be suppressed due to the tardy water loss of GPE.

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Effects of redispersible polymer powders on the structural build-up of 3D printing cement paste with and without hydroxypropyl methylcellulose

Cited by 58 publications

References 49 publications

Plastic viscosity of cement mortar with manufactured sand as influenced by geometric features and particle size

Plastic viscosity of cement mortar with manufactured sand as influenced by geometric features and particle size

The effects of nano- and micro-sized additives on 3D printable cementitious and alkali-activated composites: a review

Nanofiber Composite for Improved Water Retention and Dendrites Suppression in Flexible Zinc‐Air Batteries

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