Thermal conductivity of 3D printed concrete with recycled fine aggregate composite phase change materials

Hao, Lucen; Xiao, Jianzhuang; Sun, Jingting; Xia, Bing; Cao, Wanzhi

doi:10.1016/j.jclepro.2022.132598

Cited by 52 publications

(21 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The current work focused on powder constituent materials (cement and aggregates) of 3DPCC and has conducted an exhaustive review to collect mixture proportions. From the literature survey, 157 3DPCC mixture proportions were found in 47 references [ 34 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 ]. Even though 3DCP has been under scrutiny recently, the actual values, in terms of weight (kg/m 3 ) or volume (m 3 /m 3 ), of each constituent material employed in the mixture formulations were not always available in the literature; sometimes only some mixture design rat...…”

Section: Mixtures Proportionsmentioning

confidence: 99%

“…Replacing river sand with recycled sand from CDW (d < 0.9 mm) decreased extrudability and flowability of 3DPCC [ 77 , 78 ]. Flowability loss was more evident for higher percentages of replacement [ 75 ], while percentages between 0 and 50% of recycled sand presented a lower reduction of flowability [ 84 ]. Flowability is affected by higher water absorption of recycled sand from CDW compared to river sand, between 12.1 and 15.0% ( Table 6 ).…”

Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

See 1 more Smart Citation

3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

Fonseca¹,

Matos

2023

Materials

View full text Add to dashboard Cite

Three-dimensional Cementitious materials Printing (3DCP) is a cutting-edge technology for the construction industry. Three-dimensional printed buildings have shown that a well-developed automated technology can foster valuable benefits, such as a freeform architectural design without formworks and reduced human intervention. However, scalability, commercialization and sustainability of the 3DPC technology remain critical issues. The current work presents the ecological fragility, challenges and opportunities inherent in decreasing the 3DCP environmental footprint at a material level (cementitious materials and aggregates). The very demanding performance of printable mixtures, namely in a fresh state, requires high dosages of cement and supplementary cementitious materials (SCM). Besides the heavy carbon footprint of cement production, the standard SCM availability might be an issue, especially in the longer term. One exciting option to decrease the embodied CO2 of 3DCP is, for example, to incorporate alternative and locally available SCM as partial cement replacements. Those alternative SCM can be wastes or by-products from industries or agriculture, with no added value. Moreover, the partial replacement of natural aggregate can also bring advantages for natural resource preservation. This work has highlighted the enormous potential of 3DCP to contribute to reducing the dependence on Portland cement and to manage the current colossal wastes and by-products with no added value, shifting to a Circular Economy. Though LCA analysis, mixture design revealed a critical parameter in the environmental impact of 3DCP elements or buildings. Even though cement significantly affects the LCA of 3DCP, it is crucial to achieving adequate fresh properties and rheology. From the literature survey, mixtures formulated with alternative SCM (wastes or by-products) are still restricted to rice husk ash, Municipal Solid Waste ashes and recycled powder from construction and demolition wastes. Natural aggregate replacement research has been focused on recycled fine sand, mine tailing, copper tailing, iron tailing, ornamental stone waste, recycled glass, crumb rubber, rubber powder and granules, recycled PET bottles and steel slag. However, flowability loss and mechanical strength decrease are still critical. Research efforts are needed to find low-carbon cement replacements and mix-design optimization, leading to a more sustainable and circular 3DCP while ensuring the final product performance.

show abstract

Section: Mixtures Proportionsmentioning

confidence: 99%

Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

Fonseca¹,

Matos

2023

Materials

View full text Add to dashboard Cite

show abstract

“…Thermal performance of the concrete is important for carbon emission of buildings. Thermal characteristics of building materials have a considerable influence on the carbon emission in the building operation stage since this stage of a building's life contributes between 50 and 70% of its overall carbon emissions (Hao et al, 2022). 40% of annual worldwide carbon emissions come from the built environment.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Response surface optimization of geopolymer mix parameters in terms of key engineering properties

Ekmen

Mermerdaş²,

Alğın³

et al. 2022

rdlc

View full text Add to dashboard Cite

The main aim of the current study is to search the impact of variable matrix phase features on fly ash based lightweight geopolymer mortars (LWGM). Another scope of the study is to obtain performance oriented optimum mixture proportions through response surface method (RSM). In order to have low unit weight for LWGMs, pumice aggregate was utilized as a part of the aggregate. The investigated engineering properties are water absorption, drying shrinkage and thermal conductivity. By performing optimization analysis, it was aimed to obtain the best numerical models representing the experimental results depending on the input variables. The decrease of liquid (alkali activators) to powder (fly ash) ratio, Na2SiO3 solution to NaOH solution ratio and increase of sodium hydroxide molarity led to improvement of compressive strength. Dry thermal conductivity values in dry state were observed to be less than those of saturated ones. Moreover, the higher sodium hydroxide molarity and lower Na2SiO3 solution to NaOH solution ratios, and liquid to powder ratios resulted in further shrinkage reduction. Depending on the goals of maximum compressive strength, minimum water absorption, and drying shrinkage, optimum values for molarity, SS/SH, and l/p factors were determined as 14 M, 1.586, and 0.45, respectively.

show abstract

“…One way to increase the utilization of recycled concrete is to produce fiber-reinforced recycled concrete structural members like columns and beams. In addition, the strength and ductility of RAC can be improved by additional fiber-reinforced polymers (FRP) sheets [16][17][18][19][20]. Basalt fiber (BF) is a green, inorganic, high-performance fiber material with excellent tensile strength material.…”

Section: Introductionmentioning

confidence: 99%

Compressive Performance of Fiber Reinforced Recycled Aggregate Concrete by Basalt Fiber Reinforced Polymer-Polyvinyl Chloride Composite Jackets

Zhai¹,

Liu²,

Liu³

et al. 2023

Journal of Renewable Materials

View full text Add to dashboard Cite

The development of recycled aggregate concrete (RAC) provides a new approach to limiting the waste of natural resources. In the present study, the mechanical properties and deformability of RACs were improved by adding basalt fibers (BFs) and using external restraints, such as a fiber-reinforced polymer (FRP) jacket or a PVC pipe. Samples were tested under axial compression. The results showed that RAC (50% replacement of aggregate) containing 0.2% BFs had the best mechanical properties. Using either BFs or PVC reinforcement had a slight effect on the loadbearing capacity and mode of failure. With different levels of BFs, the compressive strengths of the specimens reinforced with 1-layer and 3-layer basalt fiber reinforced polymer (BFRP) increased by 6.7%-10.5% and 16.5%-23.7%, respectively, and the ultimate strains increased by 48.5%-80.7% and 97.1%-141.1%, respectively. The peak stress of the 3-layer BFRP-PVC increased by 42.2%, and the ultimate strain improved by 131.3%, relative to the control. This reinforcement combined the high tensile strength of BFRP, which improved the post-peak behavior, and PVC, which enhanced the structural durability. In addition, to investigate the influence of the various constraints on compressive behavior, the stress-strain response was analyzed. Based on the analysis of experimental results, a peak stress-strain model and an amended ultimate stress-strain model were proposed. The models were verified as well; the result showed that the predictions from calculations are generally consistent with the experimental data (error within 10%). The results of this study provide a theoretical basis and reference for future applications of fiber-reinforced recycled concrete. KEYWORDSBasalt fiber reinforced polymer; polyvinyl chloride; recycled aggregate concrete; axial compression performance; stress-strain relationships; stress-strain model Nomenclature f 0 l Lateral confining pressure of actively confined concrete (MPa) f lp Lateral confining pressure of PVC confined concrete (MPa) f lf Lateral confining pressure of BFRP confined concrete (MPa) E pvc Elastic modulus of PVC (MPa) e pvc Mono-axial tensile strain of PVC t pvc Thickness of PVC material (mm) E frp Elastic modulus of FRP (GPa)

show abstract

Thermal conductivity of 3D printed concrete with recycled fine aggregate composite phase change materials

Cited by 52 publications

References 52 publications

3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

Response surface optimization of geopolymer mix parameters in terms of key engineering properties

Compressive Performance of Fiber Reinforced Recycled Aggregate Concrete by Basalt Fiber Reinforced Polymer-Polyvinyl Chloride Composite Jackets

Contact Info

Product

Resources

About