Development of Zn-Al-Ti mixed oxides-modified cement phases for surface photocatalytic performance

Amor, F.; Diouri, A.; Ellouzi, Imane; Ouanji, Fatiha

doi:10.1016/j.cscm.2018.e00209

Cited by 12 publications

(9 citation statements)

References 53 publications

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“…In addition, the sulphate peaks can be seen at 2232 cm −1 and 2112 cm −1 ; in the double peak at 1150 cm −1 and 1120 cm −1 , caused by asymmetric “stretching” in the S-O bond; in the shoulder at 1010 cm −1 ; and in the peak at 673 cm −1 , caused by the “bending” of the S-O bond. The intense peaks at 1684 cm −1 and 1620 cm −1 are due to the “bending” of the O-H bonds [ 60 , 61 ]. In the clinker spectrum, the peaks at 1100 cm −1 , 922 cm −1 and the shoulder are usually assigned to C2S and C3S in the literature [ 62 , 63 ].…”

Section: Resultsmentioning

confidence: 99%

Municipal Solid Waste Incineration Fly Ash: From Waste to Cement Manufacturing Resource

et al. 2023

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This study investigates the possibility of using municipal solid waste incineration fly ash as a supplementary cementitious material to replace part of the clinker in cement. Life cycle assessment has shown that the partial replacement of clinker with blast furnace slag (CEM III) reduces cement’s global warming potential by ~30%, while replacing clinker with fly ash reduces it by up to 55%. When using CEM III as the control binder in cement in which 55 wt% of the clinker was replaced with hydrothermally treated fly ash, the flexural strength decreased by ~60% and the compressive strength by ~65%. When the fly ash was mixed with calcined and vitrified demolition materials, flexural strength decreased by ~30% and compressive strength by ~50%. The hardening of the hydraulic binders fixed the heavy metals in the municipal solid waste incineration fly ash.

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Section: Resultsmentioning

confidence: 99%

Municipal Solid Waste Incineration Fly Ash: From Waste to Cement Manufacturing Resource

et al. 2023

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“…In order to test the self-cleaning properties, tests are conducted for the decomposition of organic dyes, such as rhodamine B [ 2 , 38 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 ], methylene blue [ 22 , 39 , 74 , 75 , 76 , 77 , 78 , 79 ], and methyl orange [ 74 , 80 , 81 , 82 ]. Malachite green [ 83 ] and Congo red [ 84 ] are used much less frequently for tests.…”

Section: Test Methods Used For the Evaluation Of The Photocatalytic A...mentioning

confidence: 99%

“…The self-cleaning cement modified in such a ready state showed amazing self-cleaning properties and ensured a remarkable degradation of NO X from the air [ 4 ]. Amor et al applied a 0–20 wt.% of double lamellar hydroxides based on ZnO, Al 2 O 3 , and TiO 2 for the clinker paste, which also ensured better self-cleaning properties [ 22 ]. On the other hand, Tyukavkina et al [ 3 ] mixed powders of titanium dioxide obtained from the waste sorbent generated during the treatment of heavy non-ferrous metal discharges with Portland cement.…”

Section: Mechanism Of Photocatalysis Types Of Photoactive Cements And...mentioning

confidence: 99%

Photoactive Cements: A Review

Dudek

Janus

2022

Materials

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This article presents a short overview of modified cements with photocatalytic activity. First, the types and three main methods of obtaining photoactive cements are presented. The most frequently used modification method is the incorporation of a photocatalyst into the total mass of the cement. The second group analyzed is cements obtained by applying a thin layer of photoactive materials, e.g., paints, enamels, or TiO2 suspensions, using various techniques. The third group is cement mortars with a thick layer of photoactive concrete on the top. In addition, methods for determining the photoactivity of cement composites, mechanical properties, and physicochemical parameters of such materials are briefly presented. Finally, examples of investments with the use of photoactive cements and development prospects are shown.

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“…Hydrotalcite compounds are a kind of typical anion intercalation materials, also known as layered double hydroxides (LDHs), which have the characteristics of interlayer anion exchange, thermal stability, memory effect, acidity, and basicity [8,9] and have been widely applied in many fields, such as catalyst [10], adsorbent [11,12], drug storage and sustained-release agents [13][14][15], intercalated optical materials [16], and pollution treatment [17,18]. For example, in the aspect of concrete admixtures, the polycarboxylate group was inserted into the interlayer of LDHs to slowly release the effect of water reducing agent, which can extend the water reducing effect time and improve the slump operation time of concrete [19,20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of MgAl‐NO₂ and MgAl‐CO₃ LDHs on Durability of Mortar and Concrete

Wang

et al. 2021

Advances in Materials Science and Engineering

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Two kinds of layered double hydroxides (LDHs), MgAl-NO2 (N-LDH) and MgAl-CO3 (C-LDH), were incorporated to study the durability of mortar and concrete. The LDH contents of mortar were 1%, 2%, and 4% by mass and the LDH contents of concrete were 0.5%, 1%, 2%, 4%, respectively. The effect of LDHs on sulfate resistance of mortar was studied through dry-wetting cycle test, compressive strength test, and flexural strength test. In addition, the effects of LDHs on pore structure, chloride resistance, carbonation resistance, shrinkage, and creep of concrete were investigated by SEM, mercury injection test, XRD, chloride ion diffusion coefficient test, chloride salt corrosion depth test, carbonation depth test, shrinkage test, and creep test. The results showed that LDHs can improve the ability of resisting ion corrosion, carbonization, shrinkage, and creep, reduce the pore content, and optimize the pore structure of mortar and concrete to some extent. Moreover, 4% LDHs had a better effect on improving the durability of mortar and concrete compared to 0.5%, 1%, and 2% LDHs, and the effect of C-LDH was better than N-LDH.

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Development of Zn-Al-Ti mixed oxides-modified cement phases for surface photocatalytic performance

Cited by 12 publications

References 53 publications

Municipal Solid Waste Incineration Fly Ash: From Waste to Cement Manufacturing Resource

Municipal Solid Waste Incineration Fly Ash: From Waste to Cement Manufacturing Resource

Photoactive Cements: A Review

Experimental Investigation of MgAl‐NO₂ and MgAl‐CO₃ LDHs on Durability of Mortar and Concrete

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Development of Zn-Al-Ti mixed oxides-modified cement phases for surface photocatalytic performance

Cited by 12 publications

References 53 publications

Municipal Solid Waste Incineration Fly Ash: From Waste to Cement Manufacturing Resource

Municipal Solid Waste Incineration Fly Ash: From Waste to Cement Manufacturing Resource

Photoactive Cements: A Review

Experimental Investigation of MgAl‐NO2 and MgAl‐CO3 LDHs on Durability of Mortar and Concrete

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Experimental Investigation of MgAl‐NO₂ and MgAl‐CO₃ LDHs on Durability of Mortar and Concrete