scholarly journals Influence of Molarity and Chemical Composition on the Development of Compressive Strength in POFA Based Geopolymer Mortar

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
S. M. Alamgir Kabir ◽  
U. Johnson Alengaram ◽  
Mohd Zamin Jumaat ◽  
Afia Sharmin ◽  
Azizul Islam
Keyword(s):  
Compressive Strength ◽  
Blast Furnace Slag ◽  
Palm Oil Fuel Ash ◽  
Manufactured Sand ◽  
Granulated Blast Furnace Slag ◽  
Mix Proportion ◽  
Geopolymer Matrix ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Furnace Slag

The investigation concerns the use of the optimum mix proportion of two locally available pozzolanic waste materials, namely, ground granulated blast furnace slag (GGBS) and palm oil fuel ash (POFA), together with metakaolin (MK) as binders. In addition, another local waste material, manufactured sand (M-sand), was used as a replacement for conventional sand in the development of green geopolymer mortar. Twenty-four mortar mixtures were designed with varying binder contents and alkaline activators. The oven dry curing was also kept consistent for all the mix proportions at a temperature of 65°C for 24 hours. The highest 28-day compressive strength of about 48 MPa was obtained for the mortar containing 20% of MK, 35% of GGBS, and 45% of POFA. The increment of MK beyond 20% leads to reduction of the compressive strength. The GGBS replacement beyond 35% also reduced the compressive strength. The entire specimen achieved average 80% of the 28-day strength at the age of 3 days. The density decreased with the increase of POFA percentage. The finding of this research by using the combination of MK, GGBS, and POFA as binders to wholly replace conventional ordinary Portland cement would lead to alternate eco-friendly geopolymer matrix.

scholarly journals Kajian Kuat Mekanis Alkali-Activated Mortar (AAM)

Kilat ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 101-107
Author(s):  
Muhammad Sofyan
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Bottom Ash ◽  
Palm Oil Fuel Ash ◽  
Granulated Blast Furnace Slag ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Furnace Slag ◽  
Alkali Activated

Mortar salah satu material yang memiliki manfaat yang beraneka ragam dalam konstruksi bangunan.  Sejauh ini, mortar konvensional digunakan sebagai bahan plester atau coating pada bangunan. Bahan pengikat utama mortar pada dasarnya masih mengandalkan semen. Pemanfaatan Batu bara pada pembangkit listrik tenaga uap masih menjadi salah satu arus utama sebagai pendukung kebutuhan energi listrik. Penumpukan hasil sisa pembakaran batu bara seperti fly ash dan bottom ash berpotensi mengganggu stabilitas Ekosistem lingkungan. Alkali-Activated mortar dengan mengandalkan larutan alkali activator yang direaksikan dengan material pozzolanic seperti fly ash, Ground Granulated Blast Furnace Slag (GGBFS), Palm Oil Fuel Ash (POFA)ldan lain-lain dapat menjadi salah satu solusi dalam mengurangi limbah fly-ash yang menumpuk. Dalam beberapa riset riset terdahulu idealnya kontrol mutu dari Alkali Activated mortar dapat ditinjiau pada kekuatan mekanisnya seperti kuat tekan dan lentur Dalam artikel ini akan ditinjau bagaimana kekuatan mekanis pada beberapa jenis Alkali-Activated Mortar. Dari studi-studi yang akan dibahas tersebut akan ditarik sebuah kesimpulan berdasarkan data-data pengujian mekanis yan pada akhirnya dapat memberi rekomendasi tentang bagaimana performa mekanis pada Alkali-Activated mortar.

Strength and Microstructural Performance of Nano-SiO2 Gel (NSG) Infused Alkaline Activated Ground Blast Furnace Slag-Ultrafine Palm Oil Fuel Ash (AAGU) Based Mortar

2013 ◽  
Vol 856 ◽  
pp. 280-284 ◽  
Author(s):  
Moruf Olalekan Yusuf ◽  
Megat Azmi Megat Johari ◽  
Zainal Arifin Ahmad ◽  
Mohammed Maslehuddin
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Palm Oil ◽  
Blast Furnace Slag ◽  
Microstructural Characterization ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Product Homogeneity ◽  
Oil Fuel ◽  
Furnace Slag

The aim of this paper is to study the performance of infused nanoSiO2gel (NSG) on the developed alkaline activated binary blending of ground blast furnace slag (GBFS) and ultrafine palm oil fuel ash (UPOFA) based mortar (AAGU) using the constant mass of combined activators (10 M NaOHaq+Na2SiO3aq(Ms = SiO2/Na2O=3.3)). The methods include using the 3-day compressive strength results and microstructural characterization (SEM+EDX and FTIR). The finding revealed that the compressive strength of the mortar increased with NSG and the maximum strength achieved was 57.3 MPa signifying 21% strength gain compared to NSG-free sample. The NSG also played the role of microcracks and pore fillings, increased the product homogeneity and reduced its amorphousity due to silicate re-organization but has no effects on Si-Al substitution.

Effects of addition of Al(OH)3 on the strength of alkaline activated ground blast furnace slag-ultrafine palm oil fuel ash (AAGU) based binder

2014 ◽  
Vol 50 ◽  
pp. 361-367 ◽  
Author(s):  
Moruf Olalekan Yusuf ◽  
Megat Azmi Megat Johari ◽  
Zainal Arifin Ahmad ◽  
Mohammad Maslehuddin
Keyword(s):  
Blast Furnace ◽  
Palm Oil ◽  
Blast Furnace Slag ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Furnace Slag

Evolution of alkaline activated ground blast furnace slag–ultrafine palm oil fuel ash based concrete

2014 ◽  
Vol 55 ◽  
pp. 387-393 ◽  
Author(s):  
Moruf Olalekan Yusuf ◽  
Megat Azmi Megat Johari ◽  
Zainal Arifin Ahmad ◽  
Mohammad Maslehuddin
Keyword(s):  
Blast Furnace ◽  
Palm Oil ◽  
Blast Furnace Slag ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Furnace Slag

Investigation on Recycled Cement Based on Waste Concrete

2012 ◽  
Vol 509 ◽  
pp. 40-44 ◽  
Author(s):  
Zong Shou Lin ◽  
Yan Chong
Keyword(s):  
Compressive Strength ◽  
Blast Furnace Slag ◽  
Raw Materials ◽  
Hydration Product ◽  
Sem Analysis ◽  
Hydration Reaction ◽  
Hydration Products ◽  
Granulated Blast Furnace Slag ◽  
Mix Proportion ◽  
Furnace Slag

Adding part of granulated blast furnace slag(GBFS), steel salg(SS) , Desulfurization gypsum(DG), we can use Waste Cencrete（WC）as the main raw materials to directly produce uncalcined cement by grinding.With mix proportion 40%~50% of WC and curing in water, the 3d compressive strength of the cement can reach 10MPa.,the 28d compressive strength of the cement can reach 20~40MPa. XRD and SEM analysis show that, the hydration products of the cement are ettringite and C-S-H gel. Parts of WC involves in the hydration reaction, residual WC is wrapped by the hydration product as aggregate filler.

Influence of the Slag Replacement Percentage on the Compressive Strength and Products of Slag Based Geopolymers

2010 ◽  
Vol 177 ◽  
pp. 489-492
Author(s):  
Li Rong Yang ◽  
Man Zhen Duan
Keyword(s):  
Compressive Strength ◽  
Blast Furnace Slag ◽  
Amorphous Materials ◽  
Great Increase ◽  
Reaction Products ◽  
Granulated Blast Furnace Slag ◽  
Mix Proportion ◽  
Soluble Glass ◽  
Amorphous Aluminosilicate ◽  
Furnace Slag

The slag based geopolymers materials are synthesized at ambient temperature by using fly ash (FA) and ground granulated blast furnace slag (GGBFS) as the main starting materials, and NaOH and soluble glass together as activators. The influence of the mix proportion between GGBFS and FA on the strength and reaction products was investigated. The products obtained were characterized by means of XRD, FTIR spectroscopy and FE-SEM coupled with EDX. The results show that a great increase in compressive strength appears when the replacement percentage of GGBFS exceeds 30wt. %, the resultant products are mainly amorphous materials (amorphous aluminosilicate and/or C-S-H gel) and much more compact, homogeneous, and uniform when the amorphous aluminosilicate is increasingly turned into C-S-H gel with the increasing replacement percentage of GGBFS.

Strength and microstructure of alkali-activated binary blended binder containing palm oil fuel ash and ground blast-furnace slag

2014 ◽  
Vol 52 ◽  
pp. 504-510 ◽  
Author(s):  
Moruf Olalekan Yusuf ◽  
Megat Azmi Megat Johari ◽  
Zainal Arifin Ahmad ◽  
Mohammed Maslehuddin
Keyword(s):  
Blast Furnace ◽  
Palm Oil ◽  
Blast Furnace Slag ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Furnace Slag ◽  
Alkali Activated

Effects of H2O/Na2O molar ratio on the strength of alkaline activated ground blast furnace slag-ultrafine palm oil fuel ash based concrete

2014 ◽  
Vol 56 ◽  
pp. 158-164 ◽  
Author(s):  
Moruf Olalekan Yusuf ◽  
Megat Azmi Megat Johari ◽  
Zainal Arifin Ahmad ◽  
Mohammed Maslehuddin
Keyword(s):  
Blast Furnace ◽  
Palm Oil ◽  
Blast Furnace Slag ◽  
Molar Ratio ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Oil Fuel ◽  
Furnace Slag
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