Strength and elastic properties of mortars with various percentages of environmentally sustainable mineral binder

Toma, Ionuţ-Ovidiu; Covatariu, Daniel; Toma, Ana-Maria; Taranu, George; Budescu, Mihai

doi:10.1016/j.conbuildmat.2013.02.061

Cited by 14 publications

(5 citation statements)

References 66 publications

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“…Cement is a synthetic chemical binder extensively used as a building material. Since its first introduction in 1824, the demand for cement has increased dramatically, from 62.4 million metric tons in 1980 to 3.06 billion metric tons per year [8][9][10], which is expected to exceed the limit of 5 billion tons by the year 2030 [11,12].…”

Section: Cementmentioning

confidence: 99%

Comment On Energy-Efficient Alternative for Different Types of Traditional Soil Binders

Jangde

Khan

2023

Studia Geotechnica Et Mechanica

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Due to urban sprawl, the demand for land has increased for the purpose of construction. It is unlikely that soil available at different construction sites will be suitable for designed structures. For improving the load-bearing capacity of the soil, different soil binders are used, which are present in distinct states. In this review, the authors have collected details about various binders, which are generally used in the soil stabilization, and their effect as a binding agent on the soil. In this article, the authors tried to review different traditional binders. After studying various research articles, the authors found that lime, ground-granulated blast slag (GGBS) polypropylene, polyurethane grouting, and asphalt mix are frequently used binders. However, the authors also gathered information about the negative environmental impact of these traditional soil binders, which led to the need for alternatives to these commonly used soil binders. To diminish this issue, different alternate hydraulic and non-hydraulic binders are discussed. The authors found alternatives to cement and lime with the alkali-activated material consisting of Na2O and silica modulus and belite-calcium sulfoaluminate ferrite, which is also known as “Aether™.” According to the research, both alternatives emit 20–30% less CO2 into the environment and also improve the compressive strength of the soil. The various studies promotes bitumen modification. Incorporating 20-mesh crumb rubber and bio-oil into the bitumen reduces its viscosity and improves its fatigue value. When waste oil is mixed with asphalt, it revitalizes the bitumen, improves fatigue resistance, and increases compressive strength. The soil particles treated by Eko soil are held together by enzymes, which give them the same strength as cement. Apart from that, low-carbon binders such as basic oxygen furnace slag, bamboo fiber, enzyme-based soil treatment, zebu manure for stabilization, and lignin-contained biofuels and coproducts are discussed. Replacing these traditional binders helps with energy savings. All waste products are recycled, and energy is saved by not manufacturing traditional binders. Additionally, energy is saved, which is required to avoid the detrimental effects of these conventional binders, making them energy-efficient alternate binders. The authors also summarize the methods used, impacts, and changes that occur in soil properties after using substitutes in place of traditional binders. From the review, the authors determined that different binders have various properties in terms of chemical and physical compositions, and they show different variations in terms of strength when added to soil with low bearing capacity or poor stability.

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Section: Cementmentioning

confidence: 99%

Comment On Energy-Efficient Alternative for Different Types of Traditional Soil Binders

Jangde

Khan

2023

Studia Geotechnica Et Mechanica

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“…e design of the numerical experiments was performed considering the variation in the material properties of the Brazilian disk as Young's modulus E (22 GPa-70 GPa), Poisson's ratio v (0.15-0.33), and different friction coefficient values μ (0.2-0.5) between the contact surfaces. e computational experimental design was constructed according to the different rocks and concrete materials found in the literature review [24,[30][31][32][33][34][35]. ese parameters were varied up to five levels using a central composite design (CCD).…”

Section: Finite Element Modelsmentioning

confidence: 99%

A Novel Analytical Solution for the Brazilian Test with Loading Arcs

Gutiérrez-Moizant

Ramírez-Berasategui

Santos-Cuadros

et al. 2020

Mathematical Problems in Engineering

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This research study presents a new theoretical model to calculate the indirect tensile strength for the Brazilian disk with loading arcs, based on numerical simulations, two-dimensional elasticity theory, and Griffith failure criterion. The new expression incorporates a no uniform contact pressure distribution determined by the results of the simulations with the finite element method. A computational experiment design has been developed to test the accuracy of the predictions made with the proposed model. This study demonstrates that the stresses predicted with the new model are closer to those determined by the finite element models than other theoretical solutions available in the literature. Additionally, a comparative analysis with experimental results obtained by other authors also indicates that the new model provides a more accurate magnitude of the indirect tensile strength.

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“…Ground-granulated blast furnace slag (GGBS) is another frequently used SCM due to its beneficial effect in terms of workability, long-term mechanical properties of mortar and concrete [ 10 ], improved pore structure [ 11 ], reduced shrinkage, and better durability [ 12 ]. The replacement of OPC by phosphogypsum, a by-product of fertilizer manufacturing, has also recently been recognized to have beneficial effects in terms of the elastic, mechanical, and durability properties of mortar and concrete [ 13 , 14 , 15 ]. However, in the case of phosphogypsum, a setting retarder is recommended.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Pore Structure in Cement Pastes with Micronized Natural Zeolite

et al. 2023

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The continuous development of urban areas around the world led to an increase in construction material use and demand, with concrete seeing significant market uptake. Although significant progress has been made to reduce the environmental impact of concrete, there is still a stringent need for improvement. One of the most widely used methods to reduce the environmental impact of the cement industry and the construction industry alike is the replacement of ordinary Portland cement (OPC) by supplementary cementitious materials (SCM). Aside from by-products of industry, SCMs could also come from natural sources. Taking into account the porous structure of zeolites and their contribution to the improvement of the mechanical and durability properties of cement-based materials, the analysis of pore structure in cement pastes incorporating micronized natural zeolite is deemed necessary. In this research, the OPC was replaced by zeolite in three different percentages: 10%, 20%, and 30% by mass. The evolution of pore structure was investigated by means of nuclear magnetic resonance relaxometry at the curing ages of 1, 7, and 28 days. The microstructure of cement pastes was assessed by scanning electron microscopy investigations at 1, 7, 14, 21, and 28 days. The obtained results show that smaller pore sizes are present in cement pastes containing zeolites during the first 7 days. However, at the age of 28 days, the reference mix exhibits a similar pore structure to the mix containing 10% micronized zeolite due to the presence of larger amounts of hydration products. Increasing the replacement percentage to 30% results in larger pores, as indicated by larger values of the relaxation time.

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Strength and elastic properties of mortars with various percentages of environmentally sustainable mineral binder

Cited by 14 publications

References 66 publications

Comment On Energy-Efficient Alternative for Different Types of Traditional Soil Binders

Comment On Energy-Efficient Alternative for Different Types of Traditional Soil Binders

A Novel Analytical Solution for the Brazilian Test with Loading Arcs

Analysis of Pore Structure in Cement Pastes with Micronized Natural Zeolite

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