Lightweight geopolymer concrete: A critical review on the feasibility, mixture design, durability properties, and microstructure

Masoule, Mohammad Sadegh Tale; Bahrami, Nasrollah; Karimzadeh, Misagh; Mohasanati, Bahare; Shoaei, Parham; Ameri, Farshad; Ozbakkaloglu, Togay

doi:10.1016/j.ceramint.2022.01.298

Cited by 48 publications

(17 citation statements)

References 110 publications

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“…This was carried out to achieve chemical equilibrium of the exothermic reaction of SH and to complete the dissolution of silica fume particles. This is an important step, as the exothermicity of the activator can accelerate the geopolymerisation process, thus adversely impacting the properties of geopolymer concrete in its fresh state [ 16 , 26 ]. The densities for the SH and SS solutions were established at 1.33 g/mL 3 and 1.59 g/mL 3 , respectively, after 24 h. In addition, the viscosity of both solutions was determined as 25 ± 2 cSt for SH and 745 ± 5 cSt for SS, using a Fungi Lab Digital Rotational Viscometer Premium Series at a speed of 100 RPM for a total period of 1.5 min.…”

Section: Methodsmentioning

confidence: 99%

Physico-Mechanical Evaluation of Geopolymer Concrete Activated by Sodium Hydroxide and Silica Fume-Synthesised Sodium Silicate Solution

et al. 2023

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Commercial sodium hydroxide (NaOH) and sodium silicate (SS) have remained two of the leading alkaline activators widely used in producing geopolymer concrete, despite some identified negatives regarding their availability and additional CO2 emissions relating to the overall manufacturing process. This study reports the viability of developing geopolymer concrete using a laboratory-synthesised silica fume (SF)-derived SS solution in combination with NaOH at a molarity of 10M as an alternative binary alkali-alkaline activator to Ground Granulated Blast Furnace slag (GGBS). The use of SF in the development of geoolymer activators will pave the way for the quality usage of other high-silica content by-products from nature, industry, and agriculture. In the currently reported proof of concept, four geopolymer concrete batches were produced using different alkaline activator/precursor-A/P ratios (0.5 and 0.9) and SS to NaOH-SS/SH volume ratios (0.8/1.2 and 1.2/0.8), to establish the impact on the engineering performance. Two controls were adopted for ordinary and geopolymer concrete mixes. The engineering performance was assessed using slump and compaction index (CI) tests, while the Unconfined Compressive Strength (UCS) and tensile splitting (TS) tests were measured at different curing ages in accordance with their appropriate standards. The results indicated a reduction in slump values as the A/P ratio decreased, while the CI values showed a reversal of the identified trend in slump. Consequently, mix GC2 attained the highest UCS strength gain (62.6 MPa), displaying the superiority of the alkali activation and polymerisation process over the CSH gel. Furthermore, the impact of A/P variation on the UCS was more pronounced than SS/SH due to its vital contribution to the overall geopolymerisation process.

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Section: Methodsmentioning

confidence: 99%

Physico-Mechanical Evaluation of Geopolymer Concrete Activated by Sodium Hydroxide and Silica Fume-Synthesised Sodium Silicate Solution

et al. 2023

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“…The MK-based geopolymer gained worldwide interest in the past 40 years, because of its excellent thermal stability and high mechanical property compared to Portland cement [80]. Now, geopolymers are used as a construction material [81,82]. The advantages of using geopolymer concrete (including clay-based geopolymers) for various applications in construction are shown in Figure 13.…”

Section: Geopolymer Cement and Concretementioning

confidence: 99%

Clays and Clay Minerals in the Construction Industry

Singh

2022

Minerals

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Clay is a naturally occurring material that can be converted to different clay minerals through thermal treatments, and can be used for the development of different products. Clays and clay minerals have been used for different applications in different sectors. Detailed information regarding the applications of these materials in the construction industry are described. Clay has been used as a supplementary cementitious material in Portland cement (OPC) mortars and concretes. These minerals decrease raw materials and CO2 emissions during the production of Portland cement clinker and, at the same time, increase the compressive strength of concrete at a later age. Therefore, they are conducive to the sustainability of construction materials. A new type of cement, Limestone calcined clay cement (LC3), and a binding material geopolymer cement have also been developed using clay minerals. The properties of these binders have been discussed. Applications of clay products for making bricks have are also described in this article.

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“…(5) Other methods: This category encompasses various additional techniques, including modifications of the previously mentioned methods or the application of new approaches [17,21].…”

Section: Introductionmentioning

confidence: 99%

Green Building Materials for Circular Economy - Geopolymer Foams

Kinga Korniejenko,

Kinga Pławecka,

Patrycja Bazan

et al. 2023

Proc. eng. technol. innov.

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This study aims to design and investigate foamed geopolymers as a green material dedicated to the circular economy. For synthesis as raw material, the main waste materials of two Polish coal mines, Wieczorek and Staszic, are applied. Additionally, various foaming methods are employed to utilize the by-product of energy production, especially the fly ash generated by the Skawina power plant. In this study, the main issues addressed are related to the selection of the most appropriate foaming agent and the optimization of the process parameters, including temperature, time, and mixture components. Hydrogen peroxide, aluminum powder, and a commercial foaming agent are selected as foaming agents in this research. During the process of sample preparation, stabilizers are applied in the form of polyglycol and cellulose. Through the conducted test, the results show that hydrogen peroxide and aluminum powder emerged as the two most optimal foaming agents.

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Lightweight geopolymer concrete: A critical review on the feasibility, mixture design, durability properties, and microstructure

Cited by 48 publications

References 110 publications

Physico-Mechanical Evaluation of Geopolymer Concrete Activated by Sodium Hydroxide and Silica Fume-Synthesised Sodium Silicate Solution

Physico-Mechanical Evaluation of Geopolymer Concrete Activated by Sodium Hydroxide and Silica Fume-Synthesised Sodium Silicate Solution

Clays and Clay Minerals in the Construction Industry

Green Building Materials for Circular Economy - Geopolymer Foams

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