Experimental study on the early-age properties of cement pastes with recycled brick powder

Luo, Xu; Gao, Jianming; Li, Shujun; Xu, Zhenhai; Zeng, Xianhai

doi:10.1016/j.conbuildmat.2022.128584

Cited by 33 publications

(6 citation statements)

References 58 publications

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“…As the cement replacement with RBP increases, the slump decreases. This behavior is also reported in the literature (Schackow et al, 2015;Luo et al, 2022;Ma et al, 2020a). The workability loss is attributed to irregular RBP particles, thus increasing the water demand and reducing the air content in the mix (Liu et al, 2020;Tang et al, 2020).…”

Section: Slump Testsupporting

confidence: 82%

“…In most cases, it is observed that the compressive strength of the reference is higher on average than that of the mixtures including RBP. This is due to the clinker dilution effect, which reduces the amount of hydrated products (Luo et al, 2022).…”

Section: Compressive Strengthmentioning

confidence: 99%

“…Several studies have shown that RBP is a pozzolanic material given its high SiO 2 and Al 2 O 3 contents, in addition to the amorphous compounds formed during the brick-making process (Reig et al, 2013;Ortega et al, 2018). On the other hand, Luo et al (2022) not only highlighted the chemical characteristics of RBP, but also its physical effects, such as filling and nucleation. Arif et al (2021) replaced Portland cement with 5 and 10% RPB in order to produce concrete.…”

Section: Introductionmentioning

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: Slump Testsupporting

confidence: 82%

Section: Compressive Strengthmentioning

confidence: 99%

Section: Introductionmentioning

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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“…The incorporation of RC at 5% and 10% causes a reduction in workability by 1.1% and 4.4%, respectively, relative to RM. This slight decrease is justified by the higher water absorption of this binder, and due to the presence of a larger amount of particles smaller than 10 μm, is capable of absorbing more water [ 42 , 43 , 44 ]. The use of 10% and 20% of FA, by mass, causes a 7.7% and 17.7% increase in workability, relative to the reference mortar.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

The Influence of Recycled Cement, Fly Ash, and Magnesium Oxide on the Mechanical Performance of Sustainable Cementitious Materials

et al. 2023

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In the construction industry, cement is the most widely used material. So, to achieve greater sustainability in this industry, it is imperative to improve the sustainability of this material. One way to reduce the ecological footprint of cement is to replace it, even if partially, with other more sustainable materials that can act as binders. This paper analyses the mechanical properties of more sustainable mortars containing recycled cement (RC), fly ash (FA), and magnesium oxide (MgO). Different types of binary, ternary, and quaternary mortars were used: containing recycled cement (5% and 10%), fly ash (10% and 20%), and MgO (7.5% and 15%). An experimental campaign was carried out analysing air content, density, compressive and flexural strengths, modulus of elasticity, and ultrasonic pulse velocity. The ternary mortars showed decreases between 0.4% (M-5RC10FA) and 35.3% (M-10RC15Mg) in terms of compressive strength at 365 days (compared to RM), when the theoretically expected decrease (the sum of the decreases obtained with the individual incorporation of these materials) would be between 16.6% and 41.5%, respectively. The results obtained allow for concluding that the joint use of these materials in ternary mortars improves the mechanical capacity, relative to the individual incorporation of each material in binary mortars.

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“…Municipal solid waste (MSW) generation is currently accelerating due to factors such as growing population, expanding economic activity, rapid urbanization, and rising community living standards (Minghua et al 2009). In the past, the majority of urban waste used to be buried or stacked for disposal (Idris et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Incineration Bottom Ash as Aggregate for Controlled Low Strength Materials: Implications and Coping Strategies

Wang,

Xue,

Huang

et al. 2023

ACT

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Most waste disposal methods in Taiwan involve incineration, the incineration bottom ash (IBA) which is accumulated over the years and needs urgent treatment. Hence, using IBA to create renewable materials is essential for the sustainable development. In this study, natural aggregates in the controlled low strength material (CLSM) were replaced with IBA. Its workability, setting time, unit weight, mechanical behavior, and environmental impact were examined. The study also looked at the characteristics of CLSM and suggested solutions for improvement. The results showed that the substitution of natural fine aggregates with IBA had the most significant impact on the engineering properties of CLSM. IBA significantly improves the workability and reduces the unit weight of CLSM, but the presence of CaSO 4 had a detrimental effect on its setting time and mechanical behavior. However, treating IBA at 750℃ before use significantly improved the mechanical properties of IBA-CLSM and shortened its setting time, making it a potential permanent backfill structure. The toxicity test results showed that the IBA-CLSM produced had no threat to environmental safety. The study proved that using IBA produced in Taiwan to replace natural aggregates in CLSM was feasible and an effective way to utilize IBA.

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Experimental study on the early-age properties of cement pastes with recycled brick powder

Cited by 33 publications

References 58 publications

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

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

The Influence of Recycled Cement, Fly Ash, and Magnesium Oxide on the Mechanical Performance of Sustainable Cementitious Materials

Incineration Bottom Ash as Aggregate for Controlled Low Strength Materials: Implications and Coping Strategies

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