Physicochemical and Mechanical Properties of Portland Cements

Paine, Kevin

doi:10.1016/b978-0-08-100773-0.00007-1

Cited by 17 publications

(8 citation statements)

References 122 publications

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“…As age increased, the compressive strength also increased due to clinker hydration and reactions involving the components development, as indicated by Adu-Amankwah et al [44]. The CP V-ARI cement (clinker factor of 86%) achieved the highest values of compressive strength at all ages, ratifying, as expected, the importance of clinker content on the compressive strength development [44]- [46]. However, some blended cements with clinker factor of 50% (CM, CL, CBM and CBL) showed a combination of effects resulting from the SCMs' characteristics.…”

Section: Compressive Strengthmentioning

confidence: 57%

Compressive strength and environmental performance of blended cements with waste marble dust

Zani,

Pasolini,

Pinheiro

et al. 2024

Rev. IBRACON Estrut. Mater.

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Replacing limestone filler by waste marble dust is one of the paths to explore, at a regional level, to stimulate circularity and reduce environmental burdens of ornamental stone processing. This study investigated six blended cements which combined supplementary cementitious materials (SCMs) and limestone filler or waste marble dust, with a clinker factor of 50%. Compressive strength was determined at 3, 7, 28 and 91 days and evaluated based on the criteria standardized in ABNT NBR 16697:2018. The cementing efficiency at 7 and 28 days of the set of mineral admixtures used and greenhouse gas (GHG) emissions intensity of each cement were also calculated. The synergy between the combinations reduced the clinker factor and cement GHG emissions, whilst preserving the mechanical performance required by the construction market.

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Section: Compressive Strengthmentioning

confidence: 57%

Compressive strength and environmental performance of blended cements with waste marble dust

Zani,

Pasolini,

Pinheiro

et al. 2024

Rev. IBRACON Estrut. Mater.

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“…Research has shown that an increasing sulphate level can reduce the heat of hydration, increase setting time and reduce the strength of a cement-based material [49]. The samples Arc-Fa1 and Arc-Fa2 could be expected to have a significant negative impact on these factors.…”

Section: Discussionmentioning

confidence: 99%

Screening of untreated municipal solid waste incineration fly ash for use in cement-based materials: chemical and physical properties

Ebert,

Steenari,

Geiker

et al. 2020

SN Appl. Sci.

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The environmental impact during concrete manufacturing can be reduced by using less cement or using types of cement with high amounts of secondary cementitious materials (SCMs) and fillers. Fly ash from municipal solid waste incineration (MSWI) is an unused material, which could potentially be used as an SCM or filler. The applicability of MSWI fly ash samples in cement-based materials was investigated through an indirect determination based on the chemical composition, toxic metal content and particle size distribution of the samples. Furthermore, how the samples compared to each other and how representative the samples were for MSWI fly ash, in general, were investigated by multivariate modelling. MSWI fly ash samples were obtained from Denmark, Sweden and Greenland. Comparing the chemical composition of the MSWI fly ash samples with the chemical requirements for coal fly ash to be used in concrete, specified in EN 450-1 2012, indicated a low potential as SCMs. Additionally, the MSWI fly ash contained and leached more toxic metals than the allowed limits. The particle size distributions were larger than cement and indicated limited potential as filler. A principal component analysis showed that the obtained samples were chemically different materials compared to each other and would have different effects if used in cement-based materials. Additionally, the samples from Denmark were unrepresentative of MSWI fly ash, while the Greenlandic and Swedish samples were comparable to previously studied MSWI fly ash samples.

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“…Regardless of whether the test is manual or automatic, the time that elapses from the time of mixing until the needle reaches a certain value is given after three measurements for the initial and final setting time. The setting time is the time required for the hydration products to bind together and form a structure that resists penetration by the needle [11]. It is defined with initial and final time and can be measured on paste and mortar, while changes in aggregates are required at the concrete level.…”

Section: Methods To Test Autogenous Shrinkagementioning

confidence: 99%

“…The hydration process begins with the contact of the cement or binder with water, which leads to the dissolution of ions in the water and continues in the formation of hydrates [9][10][11]. These chemical reactions lead to the formation of a solid matrix and consequently to the release of heat [11,12]. The formation of the structure is accompanied by the development of measurable mechanical properties such as strength and modulus of elasticity.…”

Section: Sažetakmentioning

confidence: 99%

On the relation of microstructure development and time- zero as the beginning of autogenous shrinkage

Didulica¹,

Baričević²

2022

Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering

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In cementitious composites, the hydration process is the most important feature. The conditions, rate, and general manner of this process affect the properties of composites both at early and later ages. The development and prediction of future properties can be studied using both destructive and non-destructive methods to predict the potential and behaviour at later ages. Due to the early occurrence of autogenous shrinkage and the large influence of chemical shrinkage, the hydration process and the formation of the microstructure play an important role in determining the time zero point for autogenous shrinkage and the overall determination of the shrinkage value.

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Physicochemical and Mechanical Properties of Portland Cements

Cited by 17 publications

References 122 publications

Compressive strength and environmental performance of blended cements with waste marble dust

Compressive strength and environmental performance of blended cements with waste marble dust

Screening of untreated municipal solid waste incineration fly ash for use in cement-based materials: chemical and physical properties

On the relation of microstructure development and time- zero as the beginning of autogenous shrinkage

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