XRD and FTIR study of the effect of ultra high molecular weight polyethylene (UHMWPE) as binder on kaolin geopolymer ceramics

Ahmad, Romisuhani; Kamarudin, Hussin; Sandu, Andrei Victor

doi:10.1063/1.4981852

Cited by 3 publications

(2 citation statements)

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“…The higher variations in absorbance of the PE-e can be attributed to the differences in surface free energy at different wavelength [28] incident on uptake of oxygen during the synthesis of the lipidpolyethylene emulsion causing an increase in the polarity of surface free energy thereby enhancing absorption of CH ions. The presence of the polar groups increases the hydrophilicity [47] of the PE-e compared to the WPE, and this property aids in batching of the concrete. 4.9.…”

Section: Water Absorption Testmentioning

confidence: 99%

The Use of Recycled Polyethylene in Water-Oil Emulsion for Lightweight Concrete

Nangor,

Damoah,

Annan

et al. 2024

International Journal of Polymer Science

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This study was to determine the suitability of recycled waste polyethylene (WPE) processed into water-oil emulsion for lightweight concrete applications. The processed WPE in the form of polyethylene emulsion (PE-e) is to promote physical interaction between the polymeric material and the cementitious matrix. The PE-e used was also to partially replace concrete mix composition by PE-e_1, PE-e_2.5, PE-e_5, and PE-e_10 percents for reference concrete and to introduce plasticity into the mechanical behaviour of the concrete. The PE was processed into PE-e to promote affinity for water, and this hydrophilicity was prominent in PE-e_1 and PE-e_2.5 percent concretes. Concretes with PE-e_1 and PE-e_2.5 percent formed good miscibility with the cementitious matrix. The density of the PE-e concrete decreased to 13.68% with 10% PE-e at 28 days. The replacement of mix constituents of PE-e_1, PE-e_2.5, and PE-e_5 percent induced elastic to plastic behaviour in the concrete coupled with low water absorption. The FTIR data showed characteristic peaks of 3378 cm-1, 1740 cm-1, and 1148 cm-1 in the PE-e. Using optical microscopy, it was shown that the PE particles were homogenously dispersed in the concrete matrix. The study shows the feasibility of using PE-e_1 percent to produce structural lightweight concrete and up to PE-e_10 percent for nonstructural applications mainly for light non-load-bearing partitions.

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Section: Water Absorption Testmentioning

confidence: 99%

The Use of Recycled Polyethylene in Water-Oil Emulsion for Lightweight Concrete

Nangor,

Damoah,

Annan

et al. 2024

International Journal of Polymer Science

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“…Figure 3b shows the FTIR analysis results under different curing times. The bands at around 3430 −1 and a band at 1630 cm −1 are characteristic of the stretching and bending vibrations of O-H and H-O-H bonds from the physically adsorbed water [65][66][67][68]. When the curing time is increased, the O-H/H-O-H bond vibrations decrease.…”

Section: Ftirmentioning

confidence: 99%

Using Geopolymer Technology on Synthesizing Leucite Ceramics

2021

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The aim of this study is to assess the process of synthesizing potassium-based geopolymers (KGL) into leucite ceramics with regard to five variables, namely, alkaline solution ratio (R), sintering time (S), calcining temperature (T), mixing time (M), and curing time (C). Under these conditions, the specimens were tested by the viscosity test, the mechanical properties test, X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) to understand the geopolymerization reactions and the characteristics of the KGL network. The results indicate that a KOH to K2O/SiO2 ratio of 1:1 promotes the reaction within metakaolin. XRD analysis of the KGL shows that, when the temperature is 1100 °C, the phase transforms into the leucite phase. Moreover, XRD analysis, mechanical properties, and FTIR all indicate improved characteristics when the curing time increases from 1 to 8 h. This might be attributed to the enhancement of the strong interaction between the matrix and the alkaline solution upon achieving adequate time to complete the geopolymerization process and forming a more stable three-dimensional structure. The formulation which formed the purest leucite phase consisted of: a 1:1 alkaline solution ratio, 10 min mixing time, 8 h curing time, 1200 °C calcining temperature, and 2 h sintering time.

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