Novel method for preparation of calcined kaolin intercalation compound-based geopolymer

Zeng, Lu; Cao, Danyang; Xu, Yan; Fan, Chun-wei; Peng, Xiaoqin

doi:10.1016/j.clay.2014.09.034

Cited by 16 publications

(7 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some authors [52][53][54][55][56][57] explored some basic aspects of metakaolin or fly ash-based geopolymer activated using sodium alkali for high-temperature applications. They estimated that the structure was stable enough to resist to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

An investigation of the microstructure and durability of a fluidized bed fly ash–metakaolin geopolymer after heat and acid exposure

et al. 2015

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

An investigation of the microstructure and durability of a fluidized bed fly ash–metakaolin geopolymer after heat and acid exposure

et al. 2015

View full text Add to dashboard Cite

“…Geopolymers refer to binder materials that are generated through the activation of aluminosilicate materials with alkali or alkali-silicate solutions [1,2]. Geopolymers that are otherwise inorganic polymers or alkali-activated binders have garnered interest at the global level [3].…”

Section: Introductionmentioning

confidence: 99%

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

et al. 2020

View full text Add to dashboard Cite

A geopolymer has been reckoned as a rising technology with huge potential for application across the globe. Dolomite refers to a material that can be used raw in producing geopolymers. Nevertheless, dolomite has slow strength development due to its low reactivity as a geopolymer. In this study, dolomite/fly ash (DFA) geopolymer composites were produced with dolomite, fly ash, sodium hydroxide, and liquid sodium silicate. A compression test was carried out on DFA geopolymers to determine the strength of the composite, while a synchrotron Micro-Xray Fluorescence (Micro-XRF) test was performed to assess the elemental distribution in the geopolymer composite. The temperature applied in this study generated promising properties of DFA geopolymers, especially in strength, which displayed increments up to 74.48 MPa as the optimum value. Heat seemed to enhance the strength development of DFA geopolymer composites. The elemental distribution analysis revealed exceptional outcomes for the composites, particularly exposure up to 400 °C, which signified the homogeneity of the DFA composites. Temperatures exceeding 400 °C accelerated the strength development, thus increasing the strength of the DFA composites. This appears to be unique because the strength of ordinary Portland Cement (OPC) and other geopolymers composed of other raw materials is typically either maintained or decreases due to increased heat.

show abstract

“…Amount of raw waste and calcined kaolin were mixed initially to obtain a good homogenization then the prepared solution was added and mixed for 15 min; the solid/liquid ratio (S/L) is 1.2. The mixture is poured into cubic steel mold of 40 × 40 × 40 mm , which were vibrated on a vibration table for 2 min to remove any air bubbles. The specimens were covered to avoid carbonation and cured at 40°C for 24 h and at room temperature for the six next days and 27 days for testing compressive strength.…”

Section: Methodsmentioning

confidence: 99%

Efficiency of stabilization/solidification of heavy metals contained in hydroxide sludge waste into metakaolin based geopolymers

Chaabane

Moussaceb

Aït‐Mokhtar

2018

Env Prog and Sustain Energy

View full text Add to dashboard Cite

In this work, the S/S of heavy metals contained in hydroxide sludge waste was used into geopolymers. Metakaolin, sludge waste, hydroxide, and sodium silicate were mixed. Amount of waste added varied between 10% and 40% in the synthesis of geopolymers. Geopolymers were cured at 40°C for 24 h. After 7 and 28 days of aging, strength of the geopolymers specimen were studied. Mineralogical phases, morphology and FTIR analysis were used to characterize raw materials and geopolymers. TCLP test was used to determine amount of heavy metals released from S/S materials. Amount of heavy metals released are lower than quantities released from raw waste. Heavy metals were identified, by XRD analysis, within mineralogical phases. Results obtained shows that geopolymers can immobilize heavy metals and reduce their release to the environment. Mechanical strengths of all samples are higher than the lower required for the S/S processes. Best mechanical strength was of 9.29 and 10.02 MPa at 7 and 28 days, respectively. A decrease of mechanical strengths recorded is due to increasing amount of waste added that causes structural discontinuity within the gel during geopolymerization. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13137, 2019

show abstract

Novel method for preparation of calcined kaolin intercalation compound-based geopolymer

Cited by 16 publications

References 38 publications

An investigation of the microstructure and durability of a fluidized bed fly ash–metakaolin geopolymer after heat and acid exposure

An investigation of the microstructure and durability of a fluidized bed fly ash–metakaolin geopolymer after heat and acid exposure

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

Efficiency of stabilization/solidification of heavy metals contained in hydroxide sludge waste into metakaolin based geopolymers

Contact Info

Product

Resources

About