Improvement in Fresh, Mechanical and Microstructural Properties of Fly Ash- Blast Furnace Slag Based Geopolymer Concrete By Addition of Nano and Micro Silica

Mustakim, Syed Mohammed; Das, Surya Kanta; Mishra, Jyotirmoy; Aftab, Asif; Alomayri, Thamer; Assaedi, Hasan; Kaze, Cyriaque Rodrigue

doi:10.1007/s12633-020-00593-0

Cited by 111 publications

(49 citation statements)

References 60 publications

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“…Silica fume is another Pozzolanic material that was used in this study. It contains very small-sized particles that are rich in SiO2 and works as an extremely reactive pozzolanic material [37]. The chemical and physical characteristics of these materials, as well as minimum requirements based on ASTM C1240 [36], are indicated in Tables 2 and 4.…”

Section: Methodsmentioning

confidence: 99%

Mechanical and durability assessment of cement-based and alkali-activated coating mortars in an aggressive marine environment

et al. 2021

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Coatings are used as practical solutions against the intrusion of corrosive ions into concrete structures, particularly, in the harsh marine environment. In the present study, the effectiveness of using cement-based and geopolymer-based coatings produced using by-product materials has been evaluated. Silica fume and GGBFS at their optimum dosages were incorporated into mortar mixtures as a cement replacement, and mixtures of NaOH or KOH and sodium silicate solutions were used in the alkali-activated mortars. Shrinkage test, RCMT, and capillary absorption test as common experiments for durability analysis, as well as tests related to the mechanical and bonding properties including compressive strength test, pull-off test, and shear bonding strength test were carried out on the specimens. According to the results, both geopolymer and cement-based mortars improved the compressive and bonding strengths, and chloride diffusion resistance of coatings compared to the OPC mortar. Silica fume was found to be more effective in the strength development of mortars at young ages, while GGBFS was more responsible for acting as a filler and producing further gel in the older ages. The major drawback with geopolymer mortars is the high rate of water absorption and shrinkage coefficient in the early hours, which shows the importance of curing of these mortars at young ages. Overall, the mix design produced with 30% GGBFS and 7.5% silica fume showed the highest durability and mechanical properties and proved to be more compatible with the harsh environment of the Persian Gulf.

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Section: Methodsmentioning

confidence: 99%

Mechanical and durability assessment of cement-based and alkali-activated coating mortars in an aggressive marine environment

et al. 2021

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“…The combined effect of utilizing nano silica and silica fume each at 1.5% improved the microstructure of geopolymer concrete and it also possessed good compressive strength [15]. This could be due to the high rate of alkali activation reaction that takes place in geopolymer concrete [14,15,17,28]. Figure 2 shows the comparative chart of compressive strength of geopolymer concrete in which nano silica is incorporated at various percentages by various researchers.…”

Section: Recycled Concretementioning

confidence: 98%

“…The combined effect of 1% SF with 2% NS possessed good mechanical properties in geopolymer concrete [14]. The combined effect of utilizing nano silica and silica fume each at 1.5% improved the microstructure of geopolymer concrete and it also possessed good compressive strength [15]. This could be due to the high rate of alkali activation reaction that takes place in geopolymer concrete [14,15,17,28].…”

Section: Recycled Concretementioning

confidence: 98%

Effect of nano silica on the properties of concrete and mortar – A state of art

Priya

Vanitha

2021

IRASE

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Construction industry is one of the biggest sectors globally and a wide variety of materials are used to carry out various works. Particularly, cement is a material that is used in the construction of various structures and it is also the major source of emission of CO2 gas into the atmosphere which results in global warming. Many researchers have identified various replacement materials for cement as a partial substitution and carried out experiments successfully. Nano silica is widely utilized as a partial replacement for cement and a lot of research is carried out. This paper reviews the past studies in which nano silica is utilized in various building materials such as cement mortars, normal concrete and special concretes. The fresh concrete properties, strength and durability of the material are the parameters reviewed and it is apparent that by incorporating nano silica in cement it absorbs more water, which makes the mix less workable and it imparts additional strength to the concrete and also provides better durability when compared with the control specimen. Hence it has been revealed that nano silica will be a good replacement for cement as it is pozzolanic in nature and also possessing good microstructure.

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“…To achieve the fresh performances (i.e., lling ability, passing ability, and owing ability) cement, ne aggregate is increased in the mix, due to this, manufacturing price of a concrete mixture is relatively higher than convention concrete [44]. By adding mineral admixtures as SCM will help to get SCC in economical [11][12][13]46]. Fly ash is the most reliable and easily accessible industrial waste product.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrically Precipitated Fly Ash(EPFA) On Fresh and Hardened Properties of High Strength Self- Compacting Concrete

Sambangi¹,

Arunakanthi²

2021

Preprint

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Concrete is the most common heterogeneous material in the construction industry. Admixtures have gained wide use in modern constructions, which are having congested reinforcement with ambitious casting conditions. For such applications, self-compacting concrete (SCC) is the only special concrete, which can have high cohesiveness and fluidity. This paper shows the study on the fresh properties, compressive, flexural and split tensile strength in addition to RCPT, sorptivity of SCC with partially replaced electrically precipitated fly ash (EPFA) from 0 to 30% at 5% interval in cement and polycarboxylate ether-based superplasticizer as a chemical admixture. Compared the results with conventional SCC mix the fresh concrete performance was studied through the measurement of passing ability, filling ability and flowing ability by using L-Box, U-Box, V-Funnel and slump flow. The results showed that 20% EPFA as partial replacement to SCC gives better results than the conventional concrete, thereby leading to economical profits as well as ecological benefits.

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Improvement in Fresh, Mechanical and Microstructural Properties of Fly Ash- Blast Furnace Slag Based Geopolymer Concrete By Addition of Nano and Micro Silica

Cited by 111 publications

References 60 publications

Mechanical and durability assessment of cement-based and alkali-activated coating mortars in an aggressive marine environment

Mechanical and durability assessment of cement-based and alkali-activated coating mortars in an aggressive marine environment

Effect of nano silica on the properties of concrete and mortar – A state of art

Effect of Electrically Precipitated Fly Ash(EPFA) On Fresh and Hardened Properties of High Strength Self- Compacting Concrete

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