A novel non-Portland cementitious material: Mechanical properties, durability and characterization

Zhou, Shengbo; Ma, Cong; Long, Guangcheng

doi:10.1016/j.conbuildmat.2019.117671

Cited by 35 publications

(14 citation statements)

References 36 publications

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“…FA particles are spherical in shape and consist mainly of a vitreous/glassy phase with minor crystalline peaks, including quartz, mullite and magnetite [10]. Recent studies on one-part AAMs have used fly ash sinking beads (FASB) as precursors [11][12][13]. Conventional FA contains spherical micro-beads which, depending on their density, can be classified as floating or sinking beads [13].…”

Section: Industrial By-products and Waste Materialsmentioning

confidence: 99%

“…Conventional FA contains spherical micro-beads which, depending on their density, can be classified as floating or sinking beads [13]. FASB particles are spherical, finer in size than conventional FA and have a more amorphous structure, making them more reactive in alkaline environments [11,12]. Despite the wide use of FA as a precursor in one-part AAMs, its production in the future is expected to reduce significantly as coal-fired power plants shut down in most developed economies and electricity production turns to greener methods [14].…”

Section: Industrial By-products and Waste Materialsmentioning

confidence: 99%

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One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

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Section: Industrial By-products and Waste Materialsmentioning

confidence: 99%

Section: Industrial By-products and Waste Materialsmentioning

confidence: 99%

One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

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“…Therefore, in this test, the acid solution was composed of nitric acid and water with a pH of 1-2 for simulating an actual corrosive environment [34]. The other acids-such as hydrochloric or sulphuric acids-were not selected, because of their chloric (Cl − ) and sulfate (SO 4 2− ) ions that could simultaneously deteriorate mortar [35,36]. The concentration of the acid solution was weekly re-measured and regulated for stable 1-2 pH value.…”

Section: Durability Testmentioning

confidence: 99%

Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue

Long

et al. 2020

Materials

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Effective foundation reinforcement treatment is essential for modern large and complex infrastructure, while it is significant for developing new green high-performance materials for foundation reinforcement. This study investigates a new green concrete by using high volume fly-ash and coal gangue aggregates, which is expected to apply for foundation treatment of modern infrastructure with high loading-bear ability. In this experiment, 12 mix proportions of fly ash coal gangue mixture (the material name, abbreviated FGM) were designed, and its mechanical properties and durability performance were investigated. The mechanical properties of FGM include compressive strength, dynamic elastic modulus, dynamic shear modulus, Poisson’s ratio, and the stress–strain behaviors. The durability performance was evaluated by the parameters of acid resistance, which simulated an acid circumstance. After that, the environmental effects about carbon emission of this material were also investigated. Results show that the FGM with 84.6% wastes utilizing rate is a cost-effective material for foundation reinforcing treatment. Its compressive strength at 28 days and 60 days can reach more than 8 MPa and 10 MPa, respectively. After being immersed in the acid environment for 140 days, the mass loss (%) of the material could be under 3.5%. The greenness shows that the e-CO2 indices of FGM are lower than 20 kg/MPa·m3, and the e-energy indices are at below 150 MJ/MPa·m3. FGM has the advantages of acid resistance, waste recycling, and lower carbon emissions than the previous methods for foundation improvement.

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“…Decarbonization of the construction sector is closely related to the cement replacement, as the massive global cement production consumes an excessive amount of energy and is responsible for approximately 7% of the worldwide CO 2 emissions [ 1 , 2 ]. To ensure that the reduction of building emissions by 2050 will reach 95–100% below the 2015 levels and therefore fulfill the targets defined by the Paris Agreement [ 3 , 4 ], there is an effort to replace concrete and mortar in structures by more sustainable and energy efficient materials such as wood, and to replace cement in general either partially by supplementary cementitious materials, or fully by alternative binders [ 5 , 6 , 7 , 8 , 9 ]. Nowadays, various cement replacements are being quite successfully developed; however, their scope of usage is usually limited by their properties and also their availability.…”

Section: Introductionmentioning

confidence: 99%

Magnesium Potassium Phosphate Cement-Based Derivatives for Construction Use: Experimental Assessment

et al. 2022

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The presented research is focused on the development and testing of the magnesium potassium phosphate cement-based materials (MKPC-based). Firstly, the fresh state properties of the pastes consisting of dead burned magnesia powder, potassium dihydrogen phosphate, setting retarder borax applied in the range of 0–10 wt.%, and batch water were investigated. The aim of testing was to characterize the hydration process in dependence on the borax content. The properties of raw MgO powder were described by chemical composition and particle size distribution. The properties tested in fresh state included shear stress (viscosity), Young’s modulus of elasticity, and temperature; their time dependence was observed. The measurements started immediately after the mixing process. At the age of 14 days, basic structural and mechanical properties of the hardened pastes were obtained. The mixture with 5 wt.% of borax proved to be the most advantageous in terms of setting time, sample integrity, and mechanical strength; therefore, it was chosen as the binder for the following part of the study—MKPC-based mortar development. In the next step, the MKPC paste containing 5 wt.% of borax was supplemented by silica sand aggregate, and the resulting material was marked as a reference. Subsequently, three other mixtures were derived by replacing 100% of quartz sand by lightweight aggregate; namely by expanded glass aggregate, waste rubber from tires, and combination of both in ratio 1:1. The aggregates were characterized by chemical composition (except for the rubber granulate), and loose and compacted powder density. For the resulting hardened composites, basic structural, hygric, strength, and thermal parameters were investigated. The use of lightweight aggregates brought in a considerable decrease in heat transport parameters and low water permeability while maintaining sufficient strength. The favorable obtained material properties are underscored by the fact that magnesia-phosphate is considered to be a low-carbon binder. The combination of magnesia-phosphate binder and recycled aggregate provides a satisfying, environmentally friendly, and thermally efficient alternative to traditional Portland cement-based materials.

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A novel non-Portland cementitious material: Mechanical properties, durability and characterization

Cited by 35 publications

References 36 publications

One part alkali activated materials: A state-of-the-art review

One part alkali activated materials: A state-of-the-art review

Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue

Magnesium Potassium Phosphate Cement-Based Derivatives for Construction Use: Experimental Assessment

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