Effect of basaltic pumice aggregate addition on the material properties of fly ash based lightweight geopolymer concrete

Top, Soner; Vapur, Hüseyin

doi:10.1016/j.molstruc.2018.02.114

Cited by 28 publications

(16 citation statements)

References 33 publications

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“…Around the globe, NP and NS have been utilized as fine and coarse aggregates in concrete production and building blocks [13]. Top and Vapur investigated the utility of NP as course aggregates in light-weight geopolymer concrete [25].…”

Section: Introductionmentioning

confidence: 99%

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Chambua

Jande

Machunda

2021

Advances in Materials Science and Engineering

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Concrete structures suffer serious deterioration under a corrosive environment. Consequently, the service life of these concrete structures is decreased and deteriorates under combined attack of sulphate and chlorides. Most studies confined on single deteriorating factor such as sulphate attack only or chloride attack only but the current study focused on the influence of natural pumice (NP) and natural scoria (NS) on the strength performance of concrete exposed to the combined attack of sulphate and chloride. Portland cement (PLC) was replaced with NP or NS at a substitution level of 10%. Concrete samples were cured in water for the curing period of 28 days. Afterwards, the specimens were immersed in 5% sodium sulphate (Na2SO4), 5% sodium chloride (NaCl), and combined sodium sulphate and chloride solutions for additional curing of 28, 56, and 90 days. The results were compared between concrete mixes with NP or NS and control mix (CT) with PLC. The effects of sulphate, chloride, and combined sulphate and chloride were evaluated in terms of change in weight, variation in compressive strength, and degree of damage. Conclusively, the application of NP and NS has extraordinary potential to be utilized as a cementitious material in concrete to increase the resistance against aggressive salts.

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Section: Introductionmentioning

confidence: 99%

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Chambua

Jande

Machunda

2021

Advances in Materials Science and Engineering

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“…Additionally, the artificial lightweight aggregate particles manufactured with cold bonding pelletization process have smooth surfaces whereas, the natural aggregate used in the current study consists of rough particles that would increase the adherence between the geopolymer matrix and the aggregate particles [35,43,[57][58][59][60]. Besides, the strength loss by employing the A-LWA is related to the porous nature of the structure of the artificial aggregate [57,61].…”

Section: Compressive Strengthmentioning

confidence: 97%

The Impact of Artificial Lightweight Aggregate on the Engineering Features of Geopolymer Mortar

Mermerdaş¹,

İpek²,

Sor³

et al. 2020

Türk Doğa Ve Fen Dergisi

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In this study, a research on the effectiveness of artificial lightweight aggregate (A-LWA) on the fresh and hardened properties of geopolymer mortars is presented. The main aim of this study is to propose a relatively newer means of recycling of fly ash (FA) through geopolymer mortar production. Therefore, firstly, artificial lightweight aggregate (A-LWA) was produced through the cold-bonding pelletization process of FA. Then, FA based geopolymer mortars were produced with this aggregate. The geopolymer mortars manufactured in this study had constant source material and alkaline activator quantities of 600 and 300 kg m-3 , respectively. The proportion of Na 2 SiO 3-to-NaOH was 2.5 and the molarity of NaOH was 12 M. The A-LWA sand was replaced partially with river sand up to 100%. The compressive strength, ultrasonic pulse velocity, fresh and dry densities of the geopolymer composites were measured at the age of 7 days and the flow table test was conducted to indicate the consistency of the geopolymer mixtures. The results indicated the A-LWA utilization enhanced the workability of the geopolymer mixtures and the highest increase of flow diameter of 20% was obtained using 100% A-LWA. Compressive strength values of geopolymer mortars varied between 4.28 and 32.3 MPa. A systematical decrease in the compressive strength and revealed with respect to the increasing level of A-LWA due to the softness and weakness of the A-LWA particles. Ultrasonic pulse velocity results of geopolymer mortars ranged from 1479 to 2596 m s-1 with related the replacement level of A-LWA.

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“…Bui et al [1] studied the waste paper sludge (PS), one kind of recycled material, which is a replacement for the cement to enhance LWAC's quality. FA-based geopolymer (GP) concretes were produced by using a mixture of basaltic pumice (BP) aggregates and fly ash (Class F) for lightweight concrete production, which has several important advantages such as low energy necessity, especially in term of earthquakes [35].…”

Section: Recycling Materials As Cementitious Bindersmentioning

confidence: 99%

“…Using OPS as LWA to fabricate concrete was first studied in 1985 by Abdullah in Malaysia [44]. Some researchers investigated the OPS concrete, and the results showed that, in most cases, the compressive strength of OPS (4.75-9.5 mm) lightweight concrete is higher than that of the structural lightweight concrete (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35), and the density is about 20-25% lower than normal-weight concrete [45][46][47][48]. Recent studies have shown that the probability of producing high compressive strength OPS lightweight concrete is up to 53 and 56 MPa in 28 and 56 d respectively [49].…”

Section: Agricultural Wastementioning

confidence: 99%

Green and Durable Lightweight Aggregate Concrete: The Role of Waste and Recycled Materials

et al. 2020

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Lightweight aggregate concrete manufactured by solid waste or recycled by-products is a burgeoning topic in construction and building materials. It has significant merits in mitigating the negative impact on the environment during the manufacturing of Portland cement and reduces the consumption of natural resources. In this review article, the agricultural and industrial wastes and by-products, which were used as cementitious materials and artificial lightweight aggregate concrete, are summarized. Besides, the mechanical properties, durability, and a few advanced microstructure characterization methods were reviewed as well. This review also provides a look to the future research trends that may help address the challenges or further enhance the environmental benefits of lightweight aggregate concrete manufactured with solid waste and recycled by-products.

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Effect of basaltic pumice aggregate addition on the material properties of fly ash based lightweight geopolymer concrete

Cited by 28 publications

References 33 publications

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

The Impact of Artificial Lightweight Aggregate on the Engineering Features of Geopolymer Mortar

Green and Durable Lightweight Aggregate Concrete: The Role of Waste and Recycled Materials

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