Low-Carbon and Fundamental Properties of Eco-Efficient Mortar with Recycled Powders

Sun, Chang; Chen, Lulu; Xiao, Jianzhuang; Liu, Qiong; Zuo, Junqing

doi:10.3390/ma14247503

Cited by 13 publications

(4 citation statements)

References 63 publications

(83 reference statements)

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“…One of the approaches is the deployment of environmentally friendly materials in the development of agro-industrial waste-based cement composites. Over the years, the environmental benefits of using agricultural and industrial by-products as SCMs have been extensively researched [63][64][65][66], resulting in lower global warming potential and greenhouse gas emissions, the preservation of natural resources and waste reduction.…”

Section: Environmental Impactmentioning

confidence: 99%

Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder

Šupić,

Malešev,

Pantić

et al. 2023

Materials

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Implementing a circular approach through waste valorization in mortar production with environmentally efficient mix design is a viable pathway for relieving the ecological burden of greenhouse gas emissions, resource depletion and waste management. The main objective of this paper is to evaluate the feasibility of using fly ash (FA), corn cob ash (CCA), and ceramic waste powder (CWP) as supplementary cementitious materials (SCM) in cement–lime masonry mortars. As part of an extensive experimental study, twelve mortar mixtures were made: three reference and nine blended, with mixing ratios of 1:1:5, 1:0.7:4.2, and 1:1:4 ((cement + SCM)/lime/sand), by volume. The examined properties include workability, compressive and flexural strengths, dry bulk density, capillary water absorption, adhesive bond strength, and water vapor permeability. The compressive and flexural strengths of tested mortars were notably impaired, with reductions of up to 60%, while the capillary water absorption coefficient rose by 100% compared to the reference values. The adhesive bond strength of some blended mortars exceeded the strength of the reference mortars. Nevertheless, all blended mortars fulfilled the requirements for general-purpose mortars, while the majority met the criteria for structural masonry applications. In addition, a performance-based index and weighting triangle were used for the comparison and ranking of all analyzed mortar mixtures. The findings of this study may herald a novel use of FA, CCA, and CWP as more eco-friendly binding materials in contemporary construction leading to the reduction in the process’s carbon footprint, the improvement in cost efficiency, and the mitigation of the detrimental environmental impact of waste disposal.

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Section: Environmental Impactmentioning

confidence: 99%

Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder

Šupić,

Malešev,

Pantić

et al. 2023

Materials

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“…However, due to the heterogeneity of the material, more research is needed comparing different origins and sources of the RCP. On the other hand, the environmental benefit of the use of RCP to reduce both the emission of carbon dioxide (CO 2 ) and the consumption of energy has been verified in the literature (31)(32)(33). He et al (32) indicated that up to a 20% RCP could reduce up to 17.5% of CO 2 emissions.…”

Section: Introductionmentioning

confidence: 99%

The effect of recycled concrete powder (RCP) from precast concrete plant on fresh and mechanical properties of cementitious pastes

Rocha,

Tinoco,

Toledo Filho

2023

materconstrucc

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This study aims to evaluate the effect of RCP from a precast concrete plant on rheological and mechanical properties of cementitious pastes. In the study, Portland cement was replaced by RCP in 10, 20, and 30% (in mass). The hydration kinects of cement with RCP was studied through isothermal calorimetry. The fresh properties were assessed using mini-slump test and rotational rheometry. The mechanical properties were evaluated through compression tests and the microstruture was studied using Scanning Electron Microscopy. RCP reduces fluidity of the pastes, by increasing both yield stress and plastic viscosity. The addition of RCP accelerates the hydration of cement, while reducing the released heat. RCP also reduces the compressive strength and elastic modulus of the pastes. The use of RCP as partial substitute for cement is viable, due to its size distribution and specific surface area.

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“…Cement production is one of the main causes of environmental problems due to the high consumption of energy and non-renewable mineral resources, and high carbon dioxide emission [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. In order to promote the sustainable development of the cement industry, effective measures to reduce the consumption of energy and non-renewable mineral resources have become an important topic in the field of cement research.…”

Section: Introductionmentioning

confidence: 99%

Surface Properties of Eggshell Powder and Its Influence on Cement Hydration

Che

Ouyang

et al. 2022

Materials

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Using eggshell powder (EP) to replace partial cement in cement-based materials can abate pollution caused by eggshell discard and cement production. In this paper, the surface property of EP and its influence on cement hydration were studied. Quartz powder (QP) and limestone powder (LP) were used as references. First, the chemical composition of EP was characterized. Then, the surface charge properties of these materials were analyzed using zeta potential measurement. The interactions between EP surface and Ca2+ were discussed based on the zeta potential test. Afterward, a scanning electron microscope (SEM) was applied to observe the morphology of hydrates on the surfaces of these materials. The results indicated that, although the compositions of EP and LP are similar, the surface charge properties are significantly different. This is likely due to the existence of organic matter on the surface of EP and the difference in the atomic structure. As shown from the zeta potential test, EP exhibits similar interaction with Ca2+ as QP. The interactions between EP surface and Ca2+ are much weaker than that between LP and Ca2+. These weak interactions lead to the growth of C–S–H on the surface of EP particles less than that of LP particles. The chemical reactivity of EP can be improved by using heat treatment, electrical oven, etc. This study will provide theoretical support for the better use of EP in cement-based materials.

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Low-Carbon and Fundamental Properties of Eco-Efficient Mortar with Recycled Powders

Cited by 13 publications

References 63 publications

Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder

Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder

The effect of recycled concrete powder (RCP) from precast concrete plant on fresh and mechanical properties of cementitious pastes

Surface Properties of Eggshell Powder and Its Influence on Cement Hydration

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