Effect of Municipal Solid Waste Slag on the Durability of Cementitious Composites in Terms of Resistance to Freeze–Thaw Cycling

Thomas, Marta; Ślosarczyk, Agnieszka

doi:10.3390/ma16020626

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…Li et al [14] found that the chloride permeability of eco-SCM deteriorates by adding MSWI-BA, however, with insufficient durability. Thomas et al [18] revealed that upon inducing freeze-thaw cycles, the frost and abrasion resistance of mortars made with MSWI slag were comparable to or even higher than those made with natural aggregates. To summarize, MSWI-BA-reinforced concrete meets engineering requirements for durability, mechanical properties, and workability, offering advantages, such as reduced production costs, carbon footprint, and energy consumption compared to ordinary concrete [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Incorporating Steel Fibers and Municipal Waste on the Compressive Strength of Concrete

Wan,

Tan,

Long

2024

SDHM

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In this study, we assessed the impact of substituting natural fine aggregates with municipal solid waste incineration bottom ash (MSWI-BA) in steel fiber (SF)-reinforced concrete on its compressive properties post high-temperature exposure. The concrete specimens incorporating MSWI-BA as the fine aggregate and SFs for reinforcement underwent uniaxial compression tests after exposure to high temperatures. Through the tests, we investigated the impact of high-temperature exposure on mechanical properties, such as mass loss rate, stress-strain full curve, compressive strength, peak strain, elastic modulus, and so on, over different thermostatic durations. The analysis revealed that with the increasing exposure temperature and durations, the mass loss rate gradually increased; compressive strength initially increased and then decreased; peak strain significantly increased; stress-strain curve flattened, and elasticity modulus monotonically decreased. Different thermostatic durations led to distinct critical temperatures for the compressive strength (700°C for 1.0 and 1.5 h, and 500°C for 2 h). The concrete specimens exhibited an increasing compressive strength below the critical temperature, followed by a rapid decrease upon exceeding it. Based on the strain equivalence hypothesis and Weibull distribution theory, we derived expressions for the total damage variables and a uniaxial compression constitutive model, which accurately reflected the changing macro mechanical properties of concrete under various exposure temperatures and thermostatic durations. The concrete matrix microscopic morphology continuously deteriorated beyond 500°C, resulting in a loss of compressive strength. This degradation in the concrete microstructure serves as the fundamental cause for the decline in its macroscopic mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Effects of Incorporating Steel Fibers and Municipal Waste on the Compressive Strength of Concrete

Wan,

Tan,

Long

2024

SDHM

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“…MSWIBA is characterized by an unstable source, complex composition, nonuniform particle size distribution, and low reactivity, so it is necessary to adopt an activation treatment method to address the difficulties and problems of MSWIBA in engineering utilization [13]. Numerous scholars have explored the effect of MSWIBA at different blending levels on cement mortar or cement and found that bottom slag reduces the slump value [5,[13][14][15][16][17][18][19][20][21]. In contrast, the opposite trend was observed when used as a cement substitute.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Hydration Properties of Sodium Silicate-Activated Municipal Solid Waste Incineration Bottom Ash Composite Ground-Granulated Blast Furnace Slag Cementitious Materials

Deng,

Wu,

Xia

et al. 2024

Materials

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The production of municipal solid waste incineration bottom ash (MSWIBA) is substantial and has the potential to replace cement, despite challenges such as complex composition, uneven particle size distribution, and low reactivity. This paper employs sodium silicate activation of MSWIBA composite Ground-granulated Blast Furnace slag (GGBS) to improve the reactivity in preparing composite cementitious materials. It explores the hydration performance of the composite cementitious materials using isothermal calorimetric analysis, Fourier-transform infrared (FTIR) spectroscopy, XRD physical diffraction analysis, and SEM tests. SEM tests were used to explore the hydration properties of the composite gelling. The results show that with an increase in MSWIBA doping, the porosity between the materials increased, the degree of hydration decreased, and the compressive strength decreased. When the sodium silicate concentration increased from 25% to 35%, excessive alkaline material occurred, impacting the alkaline effect. This inhibited particle hydration, leading to a decrease in the degree of hydration and, consequently, the compressive strength. The exothermic process of hydration can be divided into five main stages; quartz and calcite did not fully participate in the hydration reaction, while aluminum did. The vibrational peaks of Si-O-Ti (T = Si and Al) were present in the material. The vibrational peaks of XRD, FTIR, and SEM all indicate the presence of alumosilicate network structures in the hydration products, mainly N-A-S-H and C-A-S-H gels.

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“…However, in the production of concrete and asphalt mixtures, the replacement level is often limited to 10-25% [14][15][16][17][18]. Some studies showed that in some cases up to 50-60% of natural aggregates can be successfully replaced with MSWI bottom ash [19][20][21][22]. However, in all cases, a higher amount of MSWI bottom ash is not recommended, as it leads to significantly worse performance compared to concrete and asphalt mixtures made from natural aggregates [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

A Test Road with Unbound Base and Sub-Base Course from MSWI Bottom Ash Mixtures

2023

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A considerable amount of literature has been published on municipal solid waste incinerator (MSWI) bottom ash as a substitute for natural road materials. However, most studies are conducted in the laboratory, and as a result, very little is known about the construction of pavement structural layers from MSWI bottom ash mixtures and their performance under real conditions. Therefore, the main objective of this paper is to evaluate the bearing capacity and compaction level of the unbound base and sub-base course constructed from the MSWI bottom ash mixtures. For this purpose, three MSWI bottom ash mixtures (70–100% of MSWI bottom ash) and reference mixtures only from natural aggregates were designed and used to construct the unbound base and sub-base courses on a regional road in Lithuania. In total, five different pavement structures with MSWI bottom ash mixtures and a reference one with natural aggregates were constructed and tested. The results from this study showed that unbound mixtures with 70–100% of MSWI bottom ash are suitable to construct the unbound base and sub-base courses since the bearing capacity of those layers met the requirements (≥80 MPa for the sub-base course and ≥120 MPa for the base course) and was similar to that of the reference pavement (161 MPa for sub-base course and 212 MPa for base course).

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Effect of Municipal Solid Waste Slag on the Durability of Cementitious Composites in Terms of Resistance to Freeze–Thaw Cycling

Cited by 3 publications

References 32 publications

Effects of Incorporating Steel Fibers and Municipal Waste on the Compressive Strength of Concrete

Effects of Incorporating Steel Fibers and Municipal Waste on the Compressive Strength of Concrete

Preparation and Hydration Properties of Sodium Silicate-Activated Municipal Solid Waste Incineration Bottom Ash Composite Ground-Granulated Blast Furnace Slag Cementitious Materials

A Test Road with Unbound Base and Sub-Base Course from MSWI Bottom Ash Mixtures

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