Proposing a three-phase model for predicting the mechanical properties of mortar and concrete

Krishnya, Siventhirarajah; Elakneswaran, Yogarajah; Yoda, Yuya

doi:10.1016/j.mtcomm.2021.102858

Cited by 10 publications

(4 citation statements)

References 54 publications

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“…The grout material model uses cement paste as the matrix phase and fine aggregate particles as the inclusion phase. As elastic material, its elastic modulus E, bulk modulus K, shear modulus G and Poisson's ratio v are related to each other [26]. By inputting the material parameters of aggregate into the model, the model relationship between the elastic modulus of HSGM, the elastic modulus of cement paste and the volume content of aggregate can be obtained: Based on the above data analysis and fitting results, within the range of 60~120 MPa, the standard value formula of axial compressive strength of HSGM can be defined as…”

Section: Derivation Of Elastic Modulus Modelmentioning

confidence: 99%

Study on Key Mechanical Parameters of High-Strength Grouting Material

et al. 2023

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In order to better design and calculate in infrastructures, it is necessary to clarify the key mechanical parameters of structural materials, such as axial compressive strength, elastic modulus and Poisson’s ratio. High-strength grouting material (HSGM) have begun to be used as structural materials with the development of large and complex structures. A large number of test dates were used to analyze the relationship between the axial compressive strength and the cubic compressive strength of HSGM in the paper. ABAQUS software was used to model the specimens of axial compressive strength, and the strain cloud maps of concrete and HSGM were compared and analyzed. By considering HSGM as two-phase (sand and paste) composites, the relationship between elastic modulus of HSGM and mechanical parameters of component materials was derived, and the test results of the mechanical properties of HSGM with different ratios of sand to cement were used for verification. The test results show that the axial compressive strength of the HSGM is closer to the cubic strength than that of the concrete material, which accords with the finite element analysis results. The elastic modulus of high-strength grouting material conforms to the theoretical derivation of two-phase material. The material composition is one of the main factors affecting the elastic modulus. Poisson’s ratio range of high-strength grouting material is 0.25 ± 0.01 by statistical analysis.

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Section: Derivation Of Elastic Modulus Modelmentioning

confidence: 99%

Study on Key Mechanical Parameters of High-Strength Grouting Material

et al. 2023

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“…Young's modulus and Poisson's ratio of unreacted slag are equal to 68.3 GPa [18] and 0.2 [21], respectively. For sand and aggregates, Young's modulus is equal to 50 GPa [22] and Poisson's ratio is equal to 0.2 [23]. This information is summarized in Table 1.…”

Section: Mechanical Properties Of the Phasesmentioning

confidence: 99%

Multi‐scale modeling for the prediction of Young's modulus of alkali‐activated slag concrete

Caron,

Patel,

Dehn

2023

ce papers

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Alkali‐activated slag is an alternative to ordinary Portland cement that can be used for structural applications. Young's modulus is an important property to predict stress or strains in concrete. However, the fib Model Code 2010 overestimates it for alkali‐activated slag concrete. Multi‐scale models allow the determination of concrete property from the features of the microstructure. In this study, an analytical micromechanics‐based multi‐scale homogenization model is applied to predict Young's modulus of alkali‐activated slag. It is compared to experimental results found in the literature on paste, mortar and concrete. Better predictions of Young's modulus are achieved from multiscale models compared to the fib MC 2010. Accuracy could be enhanced by improving the predictions for the degree of activation of slag for the different mixes.

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“…After hardening, cement retains its strength and stability, even under the effect of water. Cement forms a composite defined as mortar when mixed with water and fine aggregate (i.e., sand), whereas it forms concrete when mixed with water, sand and gravel (i.e., small stones) [4]. Cement-based materials, such as concrete, have been used for many centuries, mostly in the construction and civil engineering fields, thus becoming the most widely used material, and the second most consumed resource on Earth [5].…”

Section: Introductionmentioning

confidence: 99%

An Insight into the Chemistry of Cement—A Review

Lavagna

Nisticò

2022

Applied Sciences

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Even if cement is a well-consolidated material, the chemistry of cement (and the chemistry inside cement) remains very complex and still non-obvious. What is sure is that the hydration mechanism plays a pivotal role in the development of cements with specific final chemical compositions, mechanical properties, and porosities. This document provides a survey of the chemistry behind such inorganic material. The text has been organized into five parts describing: (i) the manufacture process of Portland cement, (ii) the chemical composition and hydration reactions involving a Portland cement, (iii) the mechanisms of setting, (iv) the classification of the different types of porosities available in a cement, with particular attention given to the role of water in driving the formation of pores, and (v) the recent findings on the use of recycled waste materials in cementitious matrices, with a particular focus on the sustainable development of cementitious formulations. From this study, the influence of water on the main relevant chemical transformations occurring in cement clearly emerged, with the formation of specific intermediates/products that might affect the final chemical composition of cements. Within the text, a clear distinction between setting and hardening has been provided. The physical/structural role of water in influencing the porosities in cements has been analyzed, making a correlation between types of bound water and porosities. Lastly, some considerations on the recent trends in the sustainable reuse of waste materials to form “green” cementitious composites has been discussed and future considerations proposed.

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Proposing a three-phase model for predicting the mechanical properties of mortar and concrete

Cited by 10 publications

References 54 publications

Study on Key Mechanical Parameters of High-Strength Grouting Material

Study on Key Mechanical Parameters of High-Strength Grouting Material

Multi‐scale modeling for the prediction of Young's modulus of alkali‐activated slag concrete

An Insight into the Chemistry of Cement—A Review

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