Cement Hydration Extents for Hardened Cement Paste Incorporating Nanosized-Palm Oil Fuel Ash: A Thermal and XRD Analysis Study

2020 ◽  
pp. 61-70
Author(s):  
Mohd Azrul Abdul Rajak ◽  
Zaiton Abdul Majid ◽  
Mohammad Ismail
Keyword(s):  
Cement Paste ◽  
Palm Oil ◽  
Cement Hydration ◽  
Xrd Analysis ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Palm Oil Fuel Ash ◽  
Analysis Study ◽  
Fuel Ash ◽  
Oil Fuel

scholarly journals The Effects of Nanosized-Palm Oil Fuel Ash on Early Age Hydration of Hardened Cement Paste: The Microstructure Studies

2021 ◽  
Vol 82 (2) ◽  
pp. 87-95
Author(s):  
Mohd Azrul Andul Rajak ◽  
Zaiton Abdul Majid ◽  
Mohammad Ismail
Keyword(s):  
Cement Paste ◽  
Palm Oil ◽  
Cement Hydration ◽  
Pozzolanic Reaction ◽  
Early Age ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Oil Fuel

Integration of cement-based products with nanosized-palm oil fuel ash as supplementary cementing material (SCM) amend its hydration’s degree at early age phase and the microstructural groundworks are relevant to explain the findings. Hence, the present work investigates the microstructure properties of the hardened cement paste (HCP) incorporating nPOFA to study on the effect of nPOFA in cement hydration at an early age phase. An Ordinary Portland Cement (OPC) paste as a set of HCP blended with microsized-palm oil fuel ash (mPOFA) (10-30%) and nPOFA (10-60%) were prepared and cured for 28 days. The microstructural examination of OPC, mPOFA and nPOFA cement pastes at 28 days curing age via Thermogravimetric (TG) analysis, X-Ray diffraction (XRD) analysis, morphology study and Fourier transform infrared (FTIR) spectroscopy analysis. In TG analysis, the relative weight loss of calcium hydroxide (CH) of nPOFA pastes is lower than OPC and mPOFA. Based on the CH peaks at 2?= 18.1°and 34.0° in the diffractogram, it shows that nPOFA pastes give the low CH peaks compare to OPC and mPOFA pastes. In addition, the nPOFA pastes form the dense and compact microstructure of HCP compare to other pastes. Observations from FTIR analysis, nPOFA pastes display a high frequency of Si-O band due to the high rate of pozzolanic reaction. Overall, the findings confirmed the contribution of nPOFA in accelerating the rate of cement hydration and pozzolanic reaction as it reduced the amount of CH in the cementitious matrix.

scholarly journals Effect of Ultrafine Additives on the Morphology of Cement Hydration Products

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1002
Author(s):  
Grigory Yakovlev ◽  
Rostislav Drochytka ◽  
Gintautas Skripkiunas ◽  
Larisa Urkhanova ◽  
Irina Polyanskikh ◽  
...  
Keyword(s):  
Silica Fume ◽  
Cement Paste ◽  
Cement Hydration ◽  
Chemical Reactivity ◽  
Xrd Analysis ◽  
Hardened Cement ◽  
Hydration Products ◽  
Hardened Cement Paste ◽  
X Ray ◽  
Strong Adhesion

The present research is focused on the investigation of the influence of ultrafine additives on the structure formation of hardened cement paste and the establishment of the mechanisms of the morphological transformations, which determine the properties of hydrated products. In the course of the research, the modification of ordinary Portland cement was performed by the suspension of multi-walled carbon nanotubes (MWCNTs), carbon black (CB) paste, and silica fume (SF). Scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) microanalysis, X-ray diffraction (XRD) analysis, thermal analysis, and Fourier-transform infrared (FTIR) spectroscopy were used to study cement hydration products. The morphology of hardened cement paste depends on the chemical reactivity of additives, their geometry, and their genesis. The action mechanism of the inert carbon-based additives and pozzolanic silica fume were considered. The cement hydration products formed in the process of modification by both types of ultrafine additives are described. In the case of the modification of cement paste by inert MWCNTs and CB paste, the formation of cement hydration products on their surface without strong adhesion was observed, whereas in the case of the addition of SF separately and together with MWCNTs, the strong adhesion of additives and cement hydration products was noted.

Effect of palm oil fuel ash fineness on the microstructure of blended cement paste

2011 ◽  
Vol 25 (11) ◽  
pp. 4095-4104 ◽  
Author(s):  
Wunchock Kroehong ◽  
Theerawat Sinsiri ◽  
Chai Jaturapitakkul ◽  
Prinya Chindaprasirt
Keyword(s):  
Cement Paste ◽  
Palm Oil ◽  
Blended Cement ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Blended Cement Paste

Effect of using palm oil fuel ash on the durability of cement paste in ammonium nitrate solution

2020 ◽  
Vol 257 ◽  
pp. 119597
Author(s):  
Sadia Tasnim ◽  
Yunchang Du ◽  
Muhammad Ekhlasur Rahman ◽  
Raudhah Binti Ahmadi ◽  
Shu Ing Doh
Keyword(s):  
Ammonium Nitrate ◽  
Cement Paste ◽  
Palm Oil ◽  
Nitrate Solution ◽  
Palm Oil Fuel Ash ◽  
Ammonium Nitrate Solution ◽  
Fuel Ash ◽  
Oil Fuel

Palm Oil Fuel Ash and Ceramic Sludge as Partial Cement Replacement Materials in Cement Paste

InCIEC 2014 ◽  
2015 ◽  
pp. 1087-1092 ◽  
Author(s):  
Nurliyana Ismail ◽  
Mohd Fadzil Arshad ◽  
Hamidah Mohd Saman ◽  
Mazni Mat Zin
Keyword(s):  
Cement Paste ◽  
Palm Oil ◽  
Palm Oil Fuel Ash ◽  
Cement Replacement ◽  
Fuel Ash ◽  
Partial Cement Replacement ◽  
Oil Fuel
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