Improving the Effect of Calcined Salt Mud on Mechanical Properties of 3D Printing Materials Using Recycled Construction Aggregates
Source abstract
Abstract
Using solid waste-based materials, such as recycled building aggregate (RCA), preparing 3D-printed materials can reduce costs but increase the water–cement ratio of the printed material, which reduces its mechanical performance. In order to solve the problem of mechanical properties decline caused by an increase in the w/c ratio, this experiment found that adding calcined salt mud (CSM) to the printing materials and changing the water-to-cement ratio from 0.37 to 0.4 CSM can ensure that the compressive strength of the printing materials remains basically unchanged. Moreover, through TG, SEM, and other microscopic data, it can be seen that calcium hydroxide in CSM can not only participate in the synergistic reaction of ethylene/vinyl acetate copolymer (EVA) and dust ash (DA), produce more NaOH, and promote the hydration of granulated blast furnace slag (GBFS) but also promote the formation of ettringite together with SO42− in solution, optimizing pore size distribution.
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Research context
OpenAlex topics: Innovations in Concrete and Construction Materials · Recycling and utilization of industrial and municipal waste in materials production · Recycled Aggregate Concrete Performance
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
Funding
Priority Academic Program Development of Jiangsu Higher Education Institutions · Social Development of Science and Technology Department of Jiangsu Province-Major Science and Technology Demonstration Project
References (24)
Show source-provided references
1. Improving the 3D printability of high volume fly ash mixtures via the use of nano attapulgite clay10.1016/j.compositesb.2018.11.109 ↗
2. Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing10.1016/j.compositesb.2020.107826 ↗
3. The study of the structure rebuilding and yield stress of 3D printing geopolymer pastes10.1016/j.conbuildmat.2018.06.233 ↗
4. Performance criteria, environmental impact and cost assessment for 3D printable concrete mixtures10.1016/j.resconrec.2022.106255 ↗
5. The particle-size effect of waste clay brick powder on its pozzolanic activity and properties of blended cement10.1016/j.jclepro.2019.118521 ↗
6. Effect of FA and GGBFS on compressive strength, rheology, and printing properties of cement-based 3D printing material10.1016/j.conbuildmat.2022.127685 ↗
7. Rheological properties and compressive strength of construction and demolition waste-based geopolymer mortars for 3D-Printing10.1016/j.conbuildmat.2022.127114 ↗
8. Hardened properties of layered 3D printed concrete with recycled sand10.1016/j.cemconcomp.2020.103724 ↗
9. Study on the rheology and buildability of 3D printed concrete with recycled coarse aggregates10.1016/j.jobe.2021.103030 ↗
10. Investigation on applicability of spherical electric arc furnace slag as fine aggregate in superplasticizer-free 3D printed concrete10.1016/j.conbuildmat.2021.126104 ↗
11. Utilization of recycled construction powder in 3D concrete printable materials through particle packing optimization10.1016/j.jobe.2022.105236 ↗
12. ESEM analysis of polymeric film in EVA-modified cement paste10.1016/j.cemconres.2004.10.037 ↗
13. (2018). Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure) (Standard No. ASTM C349-18).
14. (2015). Standard Test Method for Measurement of Heat of Hydration of Hydraulic Cementitious Materials Using Isothermal Conduction Calorimetry (Standard No. ASTM C1702-15a).
15. Direct ink writing of geopolymer with high spatial resolution and tunable mechanical properties
16. On the measurement of evolution of structural build-up of cement paste with time by static yield stress test vs. small amplitude oscillatory shear test10.1016/j.cemconres.2017.05.014 ↗
17. Distinguishing dynamic and static yield stress of fresh cement mortars through thixotropy10.1016/j.cemconcomp.2017.11.019 ↗
18. Interactions between alite and C(3)A-gypsum hydrations in model cements10.1016/j.cemconres.2012.10.018 ↗
19. Thermal stability of CSH phases and applicability of Richardson and Groves’ and Richardson C-(A)-SH (I) models to synthetic CSH10.1016/j.cemconres.2016.12.005 ↗
20. Influence of water-to-cement ratio and curing period on pore structure of cement mortar10.1016/j.conbuildmat.2012.09.058 ↗
21. Pore structure of hardened cement paste and mortar10.1016/0262-5075(89)90105-X ↗
22. Capillary porosity in hardened cement paste10.1520/JTE11604J ↗
23. Effect of Age and Water-Cement Ratio on Size and Dispersion of Pores in Ordinary Portland Cement Paste
24. Determination of surface area of portland cement and silica fume by mercury intrusion porosimetry