Hydration, Compressive Strength and Durability of Eco-friendly Cement Mortars Containing Recycled Brick Powder and Metakaolin

Wang, Hao; Wang, Liang; Qian, Xin; Cao, Ke; Xu, Ying; Fang, Yi; Cui, Liwen

doi:10.1007/s12205-022-0035-3

Cited by 7 publications

(2 citation statements)

References 54 publications

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“…Similarly, Wang et al (2022) indicated that, for advanced ages, 10% RBP only reduces the compressive strength by 5%, which suggests that the pozzolanic reaction of RBP has an influence at later ages. Although literature may report variations in compressive strength with the use of RBP (for replacements of up to 10%), these differences are not significant, which was also verified in our study.…”

Section: Compressive Strengthmentioning

confidence: 90%

“…Regarding density, these authors also indicated that there is no significant difference with the use of RBP. Wang et al (2022) noted that, despite the dilution effect of RBP (up to 20% RBP), secondary hydration (pozzolanic reaction) could refine the matrix pores. Ma et al (2020a) reported the same results for a particle size D50 = 42 µm, where the water absorption of replacements of up to 15% RBP was similar to the reference.…”

Section: Schackowmentioning

confidence: 99%

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Evaluating the Use of Recycled Brick Powder as a Partial Replacement for Portland Cement in Concrete

Aquino Rocha,

Morales Ruiz,

Toledo Filho

2024

Ing. Inv.

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Portland cement is one of the most used construction materials. However, its production represents between 5 and 7% of the total CO2 emissions. On the other hand, during construction and demolition activities, different wastes are produced, including recycled brick powder (RBP), whose potential as a supplementary cementitious material (SCM) has been demonstrated in the literature. This research aims to evaluate RBP as a partial replacement for Portland cement in concrete. 5 to 10% of Portland cement was replaced with RBP in two strength designs (20 and 25 MPa) in order to propose concretes that meet the requirements for use in construction. Tests involving slump, compressive strength, tensile strength by diametrical compression, absorption, density, and void content were performed. The results show that a 5% RBP replacement does not affect workability in concrete mixes, as it maintains their mechanical resistance and slightly improves their physical properties. On the other hand, 10% RBP replacements adversely affect workability and reduce tensile strength. These results are attributed to pozzolanic activity and the physical effect caused by RBP, whose performance may be improved by reducing RBP particles and increasing their specific surface area (SSA). Using RBP as a replacement for Portland cement to produce concrete is a viable alternative with a sustainable approach.

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Section: Compressive Strengthmentioning

confidence: 90%

Section: Schackowmentioning

confidence: 99%