RETRACTED: Experimental application of mineral admixtures in lightweight concrete with high strength and workability

Chen, Bing; Liu, Jenny

doi:10.1016/j.conbuildmat.2006.10.006

Cited by 30 publications

(7 citation statements)

References 8 publications

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“…However, as SSRS ratio increased beyond 20% the workability tended to decrease gradually. The consistent results on rheological property of GGBFS concrete were found in previous publications, reported by Shafigh et al [31] as well as Chen and Liu [32]. Likewise, they also noticed that beyond replacement level of 30% the workability of fresh concrete tends to reduce.…”

Section: Workabilitysupporting

confidence: 86%

Greener self-compacting concrete using stainless steel reducing slag

Sheen

Sun

2015

Construction and Building Materials

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Section: Workabilitysupporting

confidence: 86%

Greener self-compacting concrete using stainless steel reducing slag

Sheen

Sun

2015

Construction and Building Materials

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“…However, using these admixtures, the mechanical properties will inevitably be sacrificed because of the compatibility problem between the cement types and the admixtures. 31 –33 As a result, how to effectively enhance the mechanical properties but without the sacrifice of other performances are always the greatest challenges before the wide applications of LWAC.…”

Section: Introductionmentioning

confidence: 99%

Low dosage nano-silica modification on lightweight aggregate concrete

Zhang

Xie

Cheng

et al. 2018

Nanomaterials and Nanotechnology

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Although the nano modification has been considered as a promising approach to enhance the mechanical properties of cement-based concrete, the investigation of low dosage nano modification on lightweight cement-based concrete is still very limited. In this study, the lightweight concrete, which was modified with low dosage nano-silica particles, were investigated. Non-prewetting and prewetting methods were used to prepare the lightweight concrete samples. The compressive and flexural strengths were tested to evaluate the modification effects of low dosage nano-silica on lightweight concrete. The microstructure analyses demonstrate that the hydration process of the cement paste can be changed with addition of nanosilica, and new types of hydration products have been observed in nano modified cementitious matrix. The interface between the lightweight aggregates and the cement paste can be reinforced by low dosage of nano-silica due to the new types of hydration products. However, relatively high dosage of nano-silica will reduce the modification effect because of the internal stress, which is resulted from the volume expansion of the new types of hydration product, at the interface of the lightweight aggregates and the cement paste. This study not only shows the possibility of low dosage nano modification on the mechanical properties enhancement of lightweight concrete but also provides potential modification mechanisms, which help to design and fabricate high-performance lightweight concrete materials.

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“…Less than 25% of this total amount is used; only 10% of it is used in concrete technology [23]. More than 95% of the FAs produced are used by Germany, the Netherlands and Belgium, and almost 50% of the FAs produced are used in the UK [24,25].…”

Section: Introductionmentioning

confidence: 99%

A reuse study from Niğde, Turkey: the conversion of industrial ash to geopolymer

Doğan-Sağlamtimur

Bilgil

Demir

et al. 2015

Desalination and Water Treatment

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A B S T R A C TCoal is used to generate power for industrial operations. Two types of industrial ashes, including fly and bottom ash, which are solid residues arising from coal burning, are dumped to the landfill of Nig de from a selected large-scale international firm named as Gö knur A.Ş in Nig de, Turkey with no care for reuse. Geopolymer production was chosen from different alternatives of productive reuse of these waste materials. The properties of the geopolymers are dependent on source materials. Therefore, the first part included elemental analysis of ashes, sieve analysis of them, compacted bulk density analysis of them, and reaction affinity of them. The chemical composition of industrial ash used in this study contained Si and Al accompanied by Ca and Fe. This character has important implications on the potential for productive reuse and reaction potential of these waste materials. The second part of the research is planned to include ashes analysis for calculation of efficiency of combustible matter, experiment of obtaining samples from ashes in different thermal processes, activation of ashes with sodium hydroxide and sodium silicate, activation of ashes with Portland cements, pressure and resistance evaluations for geopolymer samples, water absorption experiment to them, and porosity experiment for them. Considering pressure and resistance, water absorption and porosity experiments, by only a few studies in the literature, higher-strengthened geopolymer is produced at temperatures of 100 and 150˚C.

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RETRACTED: Experimental application of mineral admixtures in lightweight concrete with high strength and workability

Cited by 30 publications

References 8 publications

Greener self-compacting concrete using stainless steel reducing slag

Greener self-compacting concrete using stainless steel reducing slag

Low dosage nano-silica modification on lightweight aggregate concrete

A reuse study from Niğde, Turkey: the conversion of industrial ash to geopolymer

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