The Study of the Construction Waste Brick Powder’s Activity

Xue, Cui Zhen; Shen, Ai Qin; Chang, Yan; Liang, Dong

doi:10.4028/www.scientific.net/amr.1079-1080.309

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…They also determined that mortars containing 5 and 10% brick powder had higher flexural strength than reference mortars at 90-day flexural strengths. The linear decrease in the 28-day flexural strengths with the increase in the brick powder replacement rate was also seen in similar studies by Liu [38] and Xue et al [39].…”

Section: Flexural Strengths Resultssupporting

confidence: 83%

Fresh and Hardened Properties of Cementitious Composites Incorporating Firebrick Powder from Construction and Demolition Waste

2022

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Firebricks are generally used in furnace basins where glass, ceramics, and cement are produced. Firebricks have an important place in construction and demolition waste (CDW). However, there is a limited understanding of the effects on fresh and hardened state properties of cementitious composites. This study investigates the mechanical, physical, and microstructural properties of cementitious composites incorporating firebrick powder (FBP) from CDW. In this regard, the FBP was used at 5, 10, 15, 20, and 25% replacement ratio by weight of cement to produce cementitious composites. The consistency, setting characteristics, and 3, 7, and 28 days compressive and flexural strength tests of produced cementitious composites were performed. In addition, ultrasonic pulse velocity, water absorption, porosity, unit weight, and microstructure analysis of cementitious composites were conducted. As a result, the 28-day compressive strength of the cementitious composite mortars containing up to 10% firebrick powder remained above 42.5 MPa. The flow diameters increased significantly with the increase of the FBP. Therefore, it has been determined that the FBP can be used up to 10% in cementitious composites that require load-bearing properties. However, FBP might be used up to 25% in some cases. Using waste FBP instead of cement would reduce the amount of cement used and lower the cost of producing cementitious composites.

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Section: Flexural Strengths Resultssupporting

confidence: 83%

Fresh and Hardened Properties of Cementitious Composites Incorporating Firebrick Powder from Construction and Demolition Waste

2022

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“…Ge et al [39] studied the long-term performance of concrete, and the results showed that the long-term performance (400 days) of concrete mixed with 10% or 20%RBP as a substitute for clinker was better, even better than ordinary Portland cement without RBP. Schackow et al [40] found that compared with the control group, the 28-day and 90-day compressive strength of mortar with RBP of 40% increased by 130% and 82%, respectively, and the compressive strength was inversely proportional to the apparent porosity. This indicates that the pozzolanic reaction [41] and micro-aggregate filling effect of RBP promote the development of compressive strength of mixed mortar when the content of RBP is appropriate.…”

Section: Compressive Strengthmentioning

confidence: 99%

Research Status and Development Trend of 3D Printing Recycled Concrete

2024

AJST

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As a new construction technology, 3D printing concrete has the advantages of mechanization and model-free. Waste brick is an important part of construction waste. Its disposal not only consumes land but also pollutes the environment. At the same time, cement is the main raw material in concrete materials. Cement production consumes resources, produces greenhouse gases and is not environmentally friendly. Therefore, grinding brick waste into recycled brick powder and replacing cement to produce 3D-printed concrete is considered a feasible method. This paper reviews the effects of recycled brick powder on hydration, workability, mechanical properties and durability of 3D-printed concrete, analyzes its mechanism, and points out some problems to be further studied at present.

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“…A reduction in the particle size of RBP accelerated the early hydration reaction and also decreased the setting time [26,27]. Lin [28] and Xue [29] studied the strength properties of cement-based materials using RBP with different substitution rates. Utilizing RBP as a partial substitution for cement resulted in a reduction in compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Study on Frost Resistance and Interface Bonding Performance through the Integration of Recycled Brick Powder in Ultra-High-Performance Concrete for Structural Reinforcement

Zhang,

Raza,

Umar

et al. 2023

Materials

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This study aims to address the issues posed by frost damage to concrete structures in cold regions, focusing on reinforcement and repair methods to increase the service life of existing structures instead of costly reconstruction solutions. Due to the limitations of conventional concrete in terms of durability and strength, this research focused on ultra-high-performance concrete (UHPC) by replacing part of the cement with recycled brick powder (RBP) to strengthen ordinary C50 concrete, obtaining UHPC-NC specimens. Mechanical tests investigated the bonding performance of UHPC-NC specimens under various conditions, including interface agents, surface roughness treatments, and freeze–thaw after 0, 50, 100, and 150 cycles with a 30% replacement rate of RBP. Additionally, a multi-factor calculation formula for interface bonding strength was established according to the test data, and the bonding mechanism and model were analyzed through an SEM test. The results indicate that the interface bonding of UHPC-NC specimens decreased during salt freezing compared to hydro-freezing, causing more severe damage. However, the relative index of splitting tensile strength for cement paste specimens showed increases of 14.01% and 14.97%, respectively, compared to specimens without an interface agent. Using an interface agent improved bonding strength and cohesiveness. The UHPC-NC bonding model without an interfacial agent can be characterized using a three-zone model. After applying an interfacial agent, the model can be characterized by a three-zone, three-layer bonding model. Overall, the RBP-UHPC-reinforced C50 for damaged concrete showed excellent interfacial bonding and frost resistance performance.

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The Study of the Construction Waste Brick Powder’s Activity

Abstract: Nowadays construction waste piles. For this phenomenon , this paper studied the mortar activity under different dosage of construction waste brick powder . The results show that with the increase of construction waste material content of brick powder, the mortar strength plummet .

Cited by 5 publications

References 1 publication

Fresh and Hardened Properties of Cementitious Composites Incorporating Firebrick Powder from Construction and Demolition Waste

Fresh and Hardened Properties of Cementitious Composites Incorporating Firebrick Powder from Construction and Demolition Waste

Research Status and Development Trend of 3D Printing Recycled Concrete

Study on Frost Resistance and Interface Bonding Performance through the Integration of Recycled Brick Powder in Ultra-High-Performance Concrete for Structural Reinforcement

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