Mechanical performance and autogenous and drying shrinkage of MgO-based recycled aggregate high-performance concrete

Revilla‐Cuesta, Víctor; Evangelista, Luís; Brito, Jorge de; Skaf, Marta; Ortega-López, Vanesa

doi:10.1016/j.conbuildmat.2021.125726

Cited by 37 publications

(5 citation statements)

References 56 publications

(123 reference statements)

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“…The interactions in an ANOVA show whether the effect of one factor is modified by varying the value of another factor [60]. In a three-way ANOVA, the third-order interaction analyzes the three factors together, while the second-order interactions analyze pairs of factors [57]. The third-order interaction was not significant for any property; so, both the compressive strength and the modulus of elasticity presented statistically equal values for various combinations of the factors.…”

Section: Three-way Analysis Of Variance (Anova)mentioning

confidence: 99%

“…Separation by age led to stronger correlations than when it was not considered. The highest level of accuracy was achieved when separation by LFS type was simultaneously considered, as it encompassed all the significant interactions according to the ANOVA (Table 6) [57]. The correlations were almost equal to 1 at all ages for the non-stabilized LFS, whereas a greater influence of age on this relationship was found for the stabilized LFS; thus, higher values were reached at older ages.…”

mentioning

confidence: 94%

“…However, if LFS is added when it has only undergone partial stabilization or if it is in its virgin state, it will undergo strength-development reactions that improve the mechanical properties [53], but it will also experience expansive phenomena due to the hydration of the free magnesium and calcium oxides that will micro-crack the cementitious matrix, potentially deteriorating the mechanical behavior [54,55]. These expansive phenomena do not necessarily have to be viewed as unfavorable, as long as they are balanced with the development of strength [32,54] or occur in situations where a reduction in concrete shrinkage is desirable, as recently demonstrated, for instance, with magnesium oxide [56][57][58].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analyzing the Relationship between Compressive Strength and Modulus of Elasticity in Concrete with Ladle Furnace Slag

Revilla-Cuesta,

Serrano-López,

Espinosa

et al. 2023

Buildings

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The addition of Ladle Furnace Slag (LFS) to concrete modifies its compressive strength and modulus of elasticity and consequently impacts their relationship. This research evaluated both properties at 28, 90, and 180 days in concrete mixes produced with 5%, 10%, and 20% of two LFS types, both stabilized and non-stabilized. The relationship between them was then analyzed through these experimental results by adopting a statistical approach. A three-way analysis of variance revealed that both properties were affected by LFS differently. Thus, the effect of each LFS content on both features varied depending on its composition and pre-treatment. Furthermore, the effect of the LFS content on the compressive strength was also influenced by the age of the concrete. These facets implied that when analyzing the relationship between both mechanical properties, the monotonic correlations were stronger than the linear ones, reaching values between 0.90 and 1.00. Therefore, the double reciprocal regression models were the most precise ones for expressing the modulus of elasticity as a function of compressive strength. The model accuracy was further enhanced when discriminating based on the LFS type and introducing concrete age as a predictive variable. With all these considerations, the average deviations between the estimated and experimental values of 1–3% and the maximum deviations of 4–7% were reached, as well as R2 coefficients of up to 97%. These aspects are central to the further development of LFS concrete models.

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Section: Three-way Analysis Of Variance (Anova)mentioning

confidence: 99%

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Analyzing the Relationship between Compressive Strength and Modulus of Elasticity in Concrete with Ladle Furnace Slag

Revilla-Cuesta,

Serrano-López,

Espinosa

et al. 2023

Buildings

Self Cite

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“…The test results show that optimizing the particle gradation of the aggregate can comprehensively improve the performance of RAC, which can effectively improve its hardening density, compressive strength, and splitting tensile strength, thus improving its durability. In summary, a large number of research results [18][19][20][21] show that particle gradation has an important effect on the performance of various building materials. Good particle gradation can effectively improve the mechanical properties of materials, and improve their permeability and durability.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Mechanical Properties of Recycled Aggregate Particle Gradation and Addition on Modified Cement Soil

Tao

et al. 2022

Crystals

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In order to study the effects of recycled aggregate with different particle gradations and different contents on the mechanical properties of cement soil modified by nano-MgO, unconfined compressive strength and scanning electron microscope (SEM) tests were carried out. The cement content was fixed at 15% and the nano-MgO content was 1.5%. The effects of two ages, three recycled aggregate contents, and three recycled aggregate particle gradations were considered. The test results show that the unconfined compressive strength of natural graded (RA), recycled coarse aggregate (SRA), and recycled fine aggregate (TRA) reached the maximum when the content of recycled aggregate was 20%, and the unconfined compressive strength of SRA was higher than that of TRA and RA. The residual strength of RA and SRA samples first increased and then decreased with the increase in recycled aggregate content, and the residual strength of TRA samples increased gradually with the increase in recycled aggregate content. The variation law of peak strain and peak strength of the three particle graded samples was consistent, and the variation law of brittle failure degree was highly consistent with that of residual strength. When the recycled aggregate content of RA, SRA, and TRA samples was 20%, the deformation resistance and stiffness of the samples were the best. In addition, SRA samples showed the best deformation resistance, followed by TRA samples and, finally, RA samples. The smaller the porosity of the sample, the tighter the sample structure and the stronger the bearing capacity of SRA. The unconfined compressive strength of the WPRA sample was represented by an exponentially negative power function of the porosity.

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“…Most researchers [13][14][15][16][17] have conducted common tests such as slump, density, compressive strength tests (CST), and so on, on conventional and recycled concrete. However, the use of some complementary tests, such as non-destructive ultrasonic pulse velocity (UPV), British pendulum number (BPN) for skid friction resistance, and Capon wide wheel abrasion tests for determining the characteristics of C&DW concrete made from fine and coarse non-selected C&D wastes, has been limited.…”

Section: Introductionmentioning

confidence: 99%

Performance Study of Sustainable Concrete Containing Recycled Aggregates from Non-Selected Construction and Demolition Waste

Akbarimehr,

Eslami,

Nasiri

et al. 2024

Sustainability

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In the present study, we investigated the mechanical performance of concrete composed of non-selected construction and demolition waste (C&DW) sourced from both old and new sections of an inactive waste landfill site in Karaj, Iran. Initially, we determined the composition of the coarse and fine C&DW used in concrete production. Subsequently, we meticulously examined the physical and chemical properties of both the C&DW and virgin materials to enable thorough comparisons of the results. We then conducted experimental analyses on 33 concrete mixtures containing recycled C&DW, utilizing various tests, including a compressive strength test (CST) for cylindrical and cubic samples, modulus of elasticity (MOE), wide wheel abrasion test (Capon test), British pendulum number (BPN), and ultrasonic pulse velocity (UPV) test. We considered both non-separated fine and coarse C&DW at different replacement ratios in the recycled concrete (RC). Our findings indicate that using non-separated coarse and fine C&DW in concrete yielded satisfactory results, leading to significant savings in virgin materials required for concrete preparation and promoting sustainable development. Furthermore, non-selected C&DW proved to be a viable sustainable material for similar concrete applications. The results revealed a decrease in brick material consumption in various constructions over the past 20 years in Karaj, contributing to the enhanced strength of C&DW concrete. However, the presence of clay minerals in aged landfill sites can adversely affect concrete performance as a potential destructive factor. Despite the possible negative impact of incorporating fine recycled C&DW materials on concrete mechanical performance, the Capon test results demonstrated that the presence of coarse C&DW can enhance concrete’s wear resistance.

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Mechanical performance and autogenous and drying shrinkage of MgO-based recycled aggregate high-performance concrete

Cited by 37 publications

References 56 publications

Analyzing the Relationship between Compressive Strength and Modulus of Elasticity in Concrete with Ladle Furnace Slag

Analyzing the Relationship between Compressive Strength and Modulus of Elasticity in Concrete with Ladle Furnace Slag

Experimental Research on the Mechanical Properties of Recycled Aggregate Particle Gradation and Addition on Modified Cement Soil

Performance Study of Sustainable Concrete Containing Recycled Aggregates from Non-Selected Construction and Demolition Waste

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