Evaluation of municipal solid waste incineration fly ash based geopolymer for stabilised recycled concrete aggregate as road material

Tabyang, Wisitsak; Suksiripattanapong, Cherdsak; Phetchuay, Chayakrit; Laksanakit, Chuthamat; Chusilp, Nuntachai

doi:10.1080/14680629.2021.1959385

Cited by 29 publications

(11 citation statements)

References 33 publications

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“…This is because silica and alumina from FA can react with calcium, which results in pozzolan and geopolymerization products [33]. The 7-d UCS of the RCA-FAG sample was better than that of the RCA with no FA because FA particles filled in RCA particles, resulting in a dense matrix [15]. 60:40, the 7-d UCS of RCA-FAG samples decreased as the Na2SiO3:NaOH ratio increased.…”

Section: Unconfined Compressive Strength Of Rca-fagmentioning

confidence: 99%

“…The United States [4], Australia [5], China [6], and Thailand [7] produced C&D materials of 584, 19.6, 1130, and 1.1 million tons, respectively. Several researchers have explored the use of recycled concrete aggregate (RCA) in pavement construction [8][9][10][11][12][13][14][15][16][17]. They reported that RCA needs to be improved by a binder (cement, lime, and fly ash) due to low physical properties (high water absorption and porosity) and engineering properties (low strengths) [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The alternative binder material, geopolymer, has lower CO 2 emissions than cement [22,23]. For example, Tabyang et al [15] investigated the CO 2 emissions of municipal solid waste incineration fly ash (MSWI FA) geopolymer and cement stabilized RCA. The cement stabilized RCA was a 22.60% higher CO 2 emission than MSWI FA geopolymer stabilized RCA.…”

Section: Introductionmentioning

confidence: 99%

“…The 60RHA:40FA ratio and 50NaOH:50Na 2 SiO 3 ratio of FA-RHA geopolymer stabilized RCA provided the optimum ingredient. Based on the strength requirement given by the national road authority of Thailand [36,37], Tabyang et al [15] reported the optimum liquid content, 90RCA:10MSWI FA ratio, and 60Na 2 SiO 3 :40NaOH of RCA-MSWI FA geopolymer samples passed the 7-d UCS requirement for the high traffic road.…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of Recycled Concrete Aggregate Using High Calcium Fly Ash Geopolymer as Pavement Base Material

et al. 2022

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This research investigated high calcium fly ash geopolymer stabilized recycled concrete aggregate (RCA-FAG) as pavement base material. The effect of recycled concrete aggregate (RCA):high calcium fly ash (FA) ratios, sodium silicate (Na2SiO3):sodium hydroxide (NaOH) ratio, and curing time on the unconfined compressive strength (UCS) and scanning electron microscope (SEM) properties of RCA-FAG samples were evaluated. The maximum dry unit weight of the RCA-FAG sample was 20.73 kN/m3 at RCA:FA ratio of 80:20 and Na2SiO3:NaOH ratio of 60:40. The 7-d UCS of RCA-FAG samples increased as the FA content and Na2SiO3:NaOH ratio increased. The 7-d UCS of the RCA-FAG sample was better than that of the RCA with no FA because FA particles filled in RCA particles, resulting in a dense matrix. The 7-d UCS of RCA-FAG samples passed the 7-d UCS requirement for the low-traffic road. All ingredients met the 7-d UCS requirement for the high-traffic road except the sample with RCA:FA of 100:0 and Na2SiO3:NaOH of 50:50 and 60:40. The 7-d SEM images indicated that spherical FA and RCA particles are bonded together, resulting in the dense matrix for all Na2SiO3:NaOH ratios. The proposed equation for predicting the UCS of RCA-FAG offered a good coefficient of correlation, which is useful in designing pavement base material from RCA-FAG material.

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Section: Unconfined Compressive Strength Of Rca-fagmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stabilization of Recycled Concrete Aggregate Using High Calcium Fly Ash Geopolymer as Pavement Base Material

et al. 2022

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“…J Xie et al [26] stimulated a combination of 70% municipal solid waste incineration (MSWI) y ash and 30% kaolin clay using potassium hydroxide as an activator, during which the maximum geopolymer strength was achieved. Wisitsak Tabyang et al [27] examined the utilization of municipal solid waste incineration y ash (MSWI FA) geopolymer in pavement applications to stabilize the strength of recycled concrete aggregate (RCA).C Fan et al [28] compared the physicochemical properties, compressive strength, microstructure and morphology of coal y ash based geopolymers and silicate cement cured MSWI y ash and showed that y ash based polymers can be effective in achieving the resource utilization of MSWI.Lei Zheng et al [29] investigated the alkaline activator The effects of dosage and Si/Al molar ratio on the compressive strength and microstructure of MSWI y ash based mass polymers were investigated.Municipal solid waste incineration residues contain a large number of toxic substances, and if their precipitation can be effectively reduced, the degree of resource utilization of waste incineration ash can be effectively improved [30][31][32][33][34][35] . X Tian et al [36] effectively enhanced the coagulation of MSWI y ash by using waste glass as an additive, and the immobilization e ciency of Cr increased with the addition of waste glass.…”

Section: Introductionmentioning

confidence: 99%

Study of the properties of red mud-waste incineration ash composites

Song,

Jiang

2024

Preprint

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Aiming at the environmental problems caused by waste incineration ash, a reuse solution was proposed to use waste incineration ash and red mud for the preparation of Controlled Low Strength Material (CLSM), to determine the effect of each parameter on the performance of the material by using a one-way test and to determine the reasonable interval of each parameter, and to design the test by using the Box-Behnken Response Surface Method. Three factors, namely, red mud percentage, water-gum ratio, and glue-sand ratio, were used as test variables, and 14d unconfined compressive strength, mobility, and cost were used as response values to optimize the objectives. The heavy metal toxicity and micro-morphology of CLSM were investigated by using microscopic means such as heavy metal leaching concentration, XRD, and FTIR. The results of the study showed that the optimal mixing ratio of CLSM was 0.5 for red mud percentage, 0.667 for water-gum ratio, and 0.45 for gum-sand ratio, which can effectively utilize the waste incineration ash and reduce environmental pollution. It was found that under alkali activation, the red mud-refuse incineration ash cementation system would change and produce new substances, with crystals as the framework and gel as the filling, forming a dense structure.

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Use of a rubber wood fly ash-based geopolymer for stabilizing marginal lateritic soil as green subbase materials

Tabyang,

Kuasakul,

Sookmanee

et al. 2024

Clean Techn Environ Policy

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Rubber wood fly ash (RWFA) is one of the main components of biomass ash materials. This research investigates the possibility of using RWFA geopolymer (RWFAG) to stabilize marginal lateritic soil (MLS) as green subbase materials. RWFA was used as a starting material.The studied influence factors included MLS:RWFA ratio, sodium silicate (NS):sodium hydroxide (NH) ratio, soaked and unsoaked conditions, and curing time. The study involved testing the unconfined compressive strength (UCS), indirect tensile strength (ITS), and conducting microstructure. The test results revealed that the optimal liquid content for the MLS-RWFAG specimens ranged between 12-24% for all ingredients. As the RWFA content increased, the maximum dry unit weight of the MLS-RWFAG decreased due to the lower specific gravity of RWFA. The MLS-RWFAG specimen with 30% RWFA content and an NS:NH ratio of 70:30 yielded the maximum UCS and ITS. The SEM-EDS analysis demonstrated the production of C-S-H and N-A-S-H gels, resulting in a dense and homogeneous matrix in the MLS-RWFAG specimens. Considering cost-effectiveness, the optimum ingredients for the MLS-RWFAG specimen were identified at an MLS:RWFA ratio of 70:30 and an NS:NH ratio of 10:90, meeting the 7-day soaked UCS requirement for pavement subbase materials. Moreover, the CO2-eq emissions from MLS-RWFAG specimens were lower compared to those from 3% cement-stabilized MLS samples. These findings strongly support the use of RWFAG as a viable alternative to Portland cement for stabilizing MLS in subbase materials.

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Evaluation of municipal solid waste incineration fly ash based geopolymer for stabilised recycled concrete aggregate as road material

Cited by 29 publications

References 33 publications

Stabilization of Recycled Concrete Aggregate Using High Calcium Fly Ash Geopolymer as Pavement Base Material

Stabilization of Recycled Concrete Aggregate Using High Calcium Fly Ash Geopolymer as Pavement Base Material

Study of the properties of red mud-waste incineration ash composites

Use of a rubber wood fly ash-based geopolymer for stabilizing marginal lateritic soil as green subbase materials

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