Enhancement of the properties of Ground Granulated Blast Furnace Slag based Self Compacting Geopolymer Concrete by incorporating Rice Husk Ash

Patel, Yamini J.; Shah, Niraj

doi:10.1016/j.conbuildmat.2018.03.166

Cited by 115 publications

(39 citation statements)

References 39 publications

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“…In terms of the alkali activators used, it can be seen from Table 1 that the most used activator is sodium hydroxide (NH) and sodium silicate (NS). These activators are preferred due to their outstanding performance as exhibited in AAC [12][13][14][15]. However, the use of these conventional activators (i.e.…”

Section: Alkali Activated Self-compacting Concrete (Aascc)mentioning

confidence: 99%

Performance and sustainability overview of alkali-activated self-compacting concrete

Adesina

2020

Waste Dispos. Sustain. Energy

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Self-compacting concrete (SCC) has gained huge attention recently due to its high workability which eliminates the need for vibration and makes its placement easier compared to conventional concrete. However, the production of Portland cement (PC) which is the main binder in SCC is energy-intensive and one of the major contributors to the world's carbon dioxide emission. On the other hand, the use of alkali-activated binders (AABs) in concrete has been reported to reduce the energy consumption and carbon emission of concrete by more than 50%. Therefore, the use of AAB as a binder in SCC can help to achieve an eco-friendlier concrete. This paper gives a short overview of the performance of SCC made with AABs. The effect of various factors on the performance of alkali-activated self-compacting concrete (AASCC) was discussed and a simplified sustainability assessment of AASCC was carried out. Discussions from this paper showed that AASCC with acceptable fresh and hardened properties can be achieved with the proper selection of materials. In addition, the evaluation of the embodied energy and carbon of different types of concrete showed that AASCC is more sustainable. However, more research in this field is required to encourage its universal acceptance and large-scale application.

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Section: Alkali Activated Self-compacting Concrete (Aascc)mentioning

confidence: 99%

Performance and sustainability overview of alkali-activated self-compacting concrete

Adesina

2020

Waste Dispos. Sustain. Energy

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“…The lower strength from use of FA-F could be attributed to its low calcium content (4% CaO) that could be assessed as insufficient for the reorganization of alumina and silica compounds in a more stable Si-O-Al form in order to develop strong bonds at ambient conditions. Specifically, at an early age (7 and 28 days), it could be noted that dissolution of the Si and Al compounds in the alkaline solution was very slow to start the geopolymerization condensation process [52]. Contrary to the FA-F performance, it can be said that the presence of a high amount of calcium may interfere with the polymerization process and alter the microstructure of the specimen [53].…”

Section: Resultsmentioning

confidence: 99%

“…A relatively rich calcium content (34.2% CaO) of SL as an aluminosilicate precursor in alkali activation, again, can be considered a dominating factor affecting the UCS of the soil-binder (geopolymer) specimen. It is reported [52] that calcium oxide (CaO) of slag produces calcium silicate hydrates (C-S-H) with the aluminosilicate gel enhancing the hardened properties of geopolymerization process. Increasing slag increases the ratio of Si/Al in the geopolymer mixture, which generally leads to an increase in strength.…”

Section: Resultsmentioning

confidence: 99%

“…The best UCS responses in the combination RHA + SL at 20% for both alkaline ratios were obtained by the addition of 20% RHA (up to 11,200 kPa for r = 1.05 and 12,500 kPa for r = 1.25). For enhancement of strength by RHA, it can be said [52] that the inclusion of RHA (limited amount) in geopolymer grout modified the reaction process and physical properties in the geopolymer matrix. The silica content for the geopolymerization process was adjusted by utilization of the silica-rich RHA.…”

Section: Resultsmentioning

confidence: 99%

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Performances of Using Geopolymers Made with Various Stabilizers for Deep Mixing

2019

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This research aims to experimentally investigate the potential use of a geopolymer made from various stabilizers or byproducts (fly ash (FA-F, FA-C), slag (SL), glass powder (GP), metakaolin (MK), marble powder (MP), bottom ash (BA), rice husk ash (RHA), silica fume (SF)) to enhance the mechanical performance of soil (clay) via a deep mixing technique. Strengths of geopolymer soilcrete specimens were determined by unconfined compressive strength (UCS) tests regarding curing times (7 to 365 days) by comparing with Portland cement (PC). In addition, ultrasonic pulse velocity (UPV) tests, the effect of molarity (8–16 M), stress-strain behavior, failure modes, and microstructure (SEM, EDX) of geopolymer specimens were examined. Compared to PC, UCS responses of geopolymer specimens yielded: (i) a decreasing trend for FA-F, GP, MK, BA, and MP + FA-F, (ii) an increasing trend for FA-C, SL, and combinations of SL (BA + SL, RHA + SL, SF + SL, MK + SL) favorable with fewer proportions of stabilizers, and (iii) higher increments due to long-term curing (90, 365 days). Despite some decrements, most UCS values were found acceptable (>0.2 MPa) for sufficient enhancement of soft clay. The UCS results were mostly confirmed by UPV performances. The geopolymer specimens were also found to present: (i) strength development for alkaline concentrations from 10 to 14 M, (ii) brittle behavior of stress–strain curves that failed in axial splitting and near axial directions, and (iii) intensity of the silica peak for strength responsibility of the dense microstructure. The findings relatively support the usage of stabilizers or byproducts in the production of geopolymers for potential use in deep mixing. Thus, this research could be a basis for further efforts in this area.

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“…Uçucu küller, metakaolinler, cam artıkları, kırmızı çamur, tarım endüstrisi yan ürünlerinin külleri (hinditan cevizi, şeker kamışı, pirinç çeltiği vb. ), ferrokrom cürufları, beton yıkım artıkları geopolimer beton üretmek için kullanılan alüminasilikat içeren bazı malzemelerdir (Nikolic vd., 2018;Bai vd., 2018;Hajimohammadi vd., 2018;Ascensao vd., 2017;Hassan vd., 2018;Arulrajah vd., 2017;Patel ve Shah, 2018;Karakoç vd., 2016;Vasquez vd., 2016).…”

Section: şEkil 2 Solvay Prosesi Akım şEmasıunclassified

Artık malzemelerden Box Behnken test dizaynı kullanılarak hafif geopolimer beton üretimi

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Vapur²

2020

DÜMF Mühendislik Dergisi

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Enhancement of the properties of Ground Granulated Blast Furnace Slag based Self Compacting Geopolymer Concrete by incorporating Rice Husk Ash

Cited by 115 publications

References 39 publications

Performance and sustainability overview of alkali-activated self-compacting concrete

Performance and sustainability overview of alkali-activated self-compacting concrete

Performances of Using Geopolymers Made with Various Stabilizers for Deep Mixing

Artık malzemelerden Box Behnken test dizaynı kullanılarak hafif geopolimer beton üretimi

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