“…Wollastonite and calcite minerals were visible at 4% and 3% weight content, respectively. The two major chemical oxide components (calcium and silica oxides) presents osumilite as having good potential for cement production [42]. The result is coherent with the XRF data of CEM II studied here.…”
The present study examines the durability properties of Class 1 (50–75 MPa) high-performance concrete (HPC) blended with rice husk ash (RHA) as a partial replacement of CEM II B-L, 42.5 N. Six HPC mixes were prepared with RHA and used as 5%, 10%, 15%, 20%, 25%, and 30% of CEM II alone and properties are compared with control mix having only CEM II. The binders (CEM II and RHA) were investigated for particle size distribution (PSD), specific surface area (SSA), oxide compositions, mineralogical phases, morphology, and functional groups using advanced techniques of laser PSD, Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared/attenuated total reflection (FTIR/ATR), respectively, to understand their import on HPC. Durability properties, including water absorption, sorptivity, and chemical attack of the HPC samples, were investigated to realise the effect of RHA on the HPC matrix. The findings revealed that the durability properties of RHA-based HPCs exhibited an acceptable range of values consistent with relevant standards. The findings established that self-produced RHA would be beneficial as a cement replacement in HPC. As the RHA is a cost-effective agro-waste, a scalable product of RHA would be a resource for sustainable technology.
“…Wollastonite and calcite minerals were visible at 4% and 3% weight content, respectively. The two major chemical oxide components (calcium and silica oxides) presents osumilite as having good potential for cement production [42]. The result is coherent with the XRF data of CEM II studied here.…”
The present study examines the durability properties of Class 1 (50–75 MPa) high-performance concrete (HPC) blended with rice husk ash (RHA) as a partial replacement of CEM II B-L, 42.5 N. Six HPC mixes were prepared with RHA and used as 5%, 10%, 15%, 20%, 25%, and 30% of CEM II alone and properties are compared with control mix having only CEM II. The binders (CEM II and RHA) were investigated for particle size distribution (PSD), specific surface area (SSA), oxide compositions, mineralogical phases, morphology, and functional groups using advanced techniques of laser PSD, Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared/attenuated total reflection (FTIR/ATR), respectively, to understand their import on HPC. Durability properties, including water absorption, sorptivity, and chemical attack of the HPC samples, were investigated to realise the effect of RHA on the HPC matrix. The findings revealed that the durability properties of RHA-based HPCs exhibited an acceptable range of values consistent with relevant standards. The findings established that self-produced RHA would be beneficial as a cement replacement in HPC. As the RHA is a cost-effective agro-waste, a scalable product of RHA would be a resource for sustainable technology.
“…(2022) . The studied result is coherent with the chemical composition data of Portland cement ( Saxena et al., 2020 ). Figure 4 XRD pattern of CEM II ( Nduka et al., 2022 ).…”
Section: Resultssupporting
confidence: 87%
“…Figure 4 depicts the diffractograms of CEM II at the temperature of manufacture, with reflections of mineral content pointed out in Nduka et al (2022). The studied result is coherent with the chemical composition data of Portland cement (Saxena et al, 2020).…”
With the developing technology, devices that can fully control the quality of cement and clinker in cement production have been produced. These devices can give accurate results in a short time and with minimum error margins, with all necessary analyzes and phase compositions. Although these methods are very useful for cement factories in practice, they cannot fully reveal some parameters such as crystal structure and morphology of clinker phases, size distribution and clinker porosity. In microscopic studies, the formation, size, distribution and amount of clinker phases in the examined cross-sectional area can be determined. In this study, optical microscope examination and image processing techniques were used to determine the clinker characteristics. Raw meal was formed by mixing limestone and clay from cement raw materials in certain proportions. Then, clinker was obtained as a result of burning the raw meal at approximately 1400 o C. In addition to performing rapid phase analysis using image processing programs, information about the crystal properties of the phases was obtained. The size, number, average equivalent diameter, distribution of clinker phases and porosities can also be examined with the help of image processing programs. According to the result of the image processing method, Portland cement clinker with easy burning properties, high alite and low belite content was obtained.
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