Pressed lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete aggregate

Posi, Patcharapol; Thongjapo, Pearploy; Thamultree, Natakorn; Boontee, Phongsathon; Kasemsiri, Pornnapa; Chindaprasirt, Prinya

doi:10.1016/j.conbuildmat.2016.09.105

Cited by 49 publications

(20 citation statements)

References 28 publications

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“…However, the compressive strengths of PRGCs mixed with RC (4.4–8.1 MPa) and RB (2.4–7.2 MPa) were close to those of compressive strength values for moderate strength lightweight concrete (2–14 MPa) as per ACI 213 . Besides, the compressive strength of PRGCs mixed with recycled aggregates in the study were also in the range of pressed lightweight ordinary Portland cement concrete containing calcined diatomite (7–12 MPa) and pressed lightweight fly ash‐ordinary Portland cement geopolymer concrete mixed with recycled lightweight concrete block aggregate (4–17 MPa) …”

Section: Resultsmentioning

confidence: 83%

“…The pressing technique was adopted as it simulated the production of concrete blocks. The fresh dry mix was pressed and formed into concrete block without the need of using molds which requires assembling and cleaning of as well as demolding . For each mixture, three 10‐cm cube PRGC specimens were fabricated to measure the compressive strength and other three 10‐cm cubes were for dry density, water absorption, porosity, thermal conductivity, and ultrasonic pulse tests.…”

Section: Methodsmentioning

confidence: 99%

“…The fresh dry mix was pressed and formed into concrete block without the need of using molds which requires assembling and cleaning of as well as demolding. 7,33 For each mixture, three 10-cm cube PRGC specimens were fabricated to measure the compressive strength and other three 10-cm cubes were for dry density, water absorption, porosity, thermal conductivity, and ultrasonic pulse tests. The 10-cm cube samples were wrapped with plastic sheet to prevent moisture loss and were put in the oven at…”

Section: Preparation Of Specimenmentioning

confidence: 99%

“…The waste from construction and demolition (C&D) sites is commonly dumped in low lying areas or landfills for disposal instead of being reused and recycled . Recycled aggregates achieved by crushing waste concrete from laboratory tested concrete samples, rejected precast members, C&D waste, industrial waste and so on are a sustainable alternative to natural resources. Consequently, the consumption of recycled aggregate is not only an eco‐friendly alternative approach and a value added process but also reduces the issue of waste storage .…”

Section: Introductionmentioning

confidence: 99%

“…The mixes contained low alkali solution and fly ash contents and the PRGC samples were subjected to a different compaction method from that of normal geopolymer concrete. Posi et al showed that the PRGCs containing recycled aggregate from waste lightweight concrete possessed acceptable densities and compressive strengths. They also found that the lightweight and high strength pressed concretes were obtained with the use of pressing technique with small pressure (0.85 MPa) .…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Use of recycled aggregates in pressed fly ash geopolymer concrete

Wongsa

Siriwattanakarn

Nuaklong

et al. 2019

Env Prog and Sustain Energy

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In this study, the physical, mechanical, and thermal properties of pressed geopolymer concrete (PRGC) mixed with recycled concrete aggregate (RC) and recycled concrete block aggregate (RB) were investigated. Lignite coal fly ash, sodium hydroxide solution (NaOH), and sodium silicate solution were used as source materials to make geopolymer paste. The effect of fly ash to aggregate ratios and concentrations of NaOH on PRGC properties were tested. Test results were also compared to those of PRGCs mixed with conventional aggregate (limestone dust, SD). The test results showed that PRGCs containing RC and RB exhibited lower dry density, thermal conductivity, and compressive strength than those of PRGCs containing SD. Nevertheless, the compressive strength of PRGCs mixed with recycled aggregates was close to the compressive strength for moderate strength lightweight concrete as per ACI 213. Moreover, the lower thermal conductivity and dry density indicated better insulating properties than that of PRGCs containing SD. The developed PRGCs containing RC and RB in the study can be used for the manufacturing of hollow geopolymer‐based concrete block which are green material with improved insulating properties.

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Section: Resultsmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Specimenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Use of recycled aggregates in pressed fly ash geopolymer concrete

Wongsa

Siriwattanakarn

Nuaklong

et al. 2019

Env Prog and Sustain Energy

Self Cite

View full text Add to dashboard Cite

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The single and hybrid use of steel and basalt fibers on high‐temperature resistance of sustainable ultra‐high performance geopolymer cement mortars

Güler

Akbulut

2023

Structural Concrete

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This paper primarily examines the flowability, physical appearance, mass loss, residual compressive strength (RCS), and residual flexural strength (RFS) properties of steel (ST) and basalt (BA) fiber-added sustainable ultra-high performance geopolymer cement (UHPGPC) mortars exposed to hightemperature effects. According to the results obtained, ST and BA fibers adversely influence the workability properties of UHPGPC mortars and thus significantly reduce the spreading diameters of the mortars. However, ST and BA fibers substantially improve the RCS and RFS capacities of UHPGPC specimens exposed to high temperatures because they have a powerful bonding effect with the matrix and effectually restrict the development of micro-and macro-cracks with their bridging effect. Furthermore, this phenomenon is slightly more effective in hybrid form than using ST and BA fibers.

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