Properties of concrete made with recycled coarse aggregate from waste brick

Zhang, Shiping; Zong, Liang

doi:10.1002/ep.11880

Cited by 45 publications

(28 citation statements)

References 18 publications

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“…12,13 With the limited landfill areas in many parts of the world, there is a need to encounter the feasibility use of concrete production waste as innovative construction materials. Many researches have shown that recycled aggregate from recycled concrete aggregate (RC), [14][15][16] recycled mortar aggregate, 17 recycled concrete block aggregate (RB), 18 recycled crushed clay brick aggregate, 12,19 recycled lightweight concrete aggregate, 20,21 and recycled civil engineering waste aggregate 2 can be used to fabricate Portland cement composites.…”

Section: Introductionmentioning

confidence: 99%

Use of recycled aggregates in pressed fly ash geopolymer concrete

Wongsa

Siriwattanakarn

Nuaklong

et al. 2019

Env Prog and Sustain Energy

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In this study, the physical, mechanical, and thermal properties of pressed geopolymer concrete (PRGC) mixed with recycled concrete aggregate (RC) and recycled concrete block aggregate (RB) were investigated. Lignite coal fly ash, sodium hydroxide solution (NaOH), and sodium silicate solution were used as source materials to make geopolymer paste. The effect of fly ash to aggregate ratios and concentrations of NaOH on PRGC properties were tested. Test results were also compared to those of PRGCs mixed with conventional aggregate (limestone dust, SD). The test results showed that PRGCs containing RC and RB exhibited lower dry density, thermal conductivity, and compressive strength than those of PRGCs containing SD. Nevertheless, the compressive strength of PRGCs mixed with recycled aggregates was close to the compressive strength for moderate strength lightweight concrete as per ACI 213. Moreover, the lower thermal conductivity and dry density indicated better insulating properties than that of PRGCs containing SD. The developed PRGCs containing RC and RB in the study can be used for the manufacturing of hollow geopolymer‐based concrete block which are green material with improved insulating properties.

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Section: Introductionmentioning

confidence: 99%

Use of recycled aggregates in pressed fly ash geopolymer concrete

Wongsa

Siriwattanakarn

Nuaklong

et al. 2019

Env Prog and Sustain Energy

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“…Germany first produced concrete products using crushed clay bricks in 1860, but it was not until the end of the Second World War where crushed bricks were used in large quantities as aggregates to produce fresh concrete [3]. According to the literature, the utilization and research of recycled clay bricks are mainly embodied in the following aspects: (1) the influence of the recycled clay brick aggregates completely or partially replacing the natural aggregates on the mechanical properties and durability of recycled concrete [4][5][6][7][8][9][10][11][12]; (2) the influence of recycled clay brick powder as part of cement substitute material on the mechanical properties and durability of concrete and mortar [11,[13][14][15][16]; and (3) the application of recycled aggregates in subgrade and pavement base or subbase filling [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Determination of Gradation of Recycled Mixed Coarse Aggregates for Pavement Base or Subbase by Crushing Fractals

Jian-jun

Pei

et al. 2019

Advances in Materials Science and Engineering

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A loading crushing test of recycled mixed coarse aggregates in the same particle diameter range is carried out, and the crushed coarse aggregates are screened, manually sorted, and weighed to study the crushing characteristics of recycled mixed coarse aggregates. The results show that the effect of “reinforcing the strong and discarding the weak” exists between two types of recycled mixed coarse aggregates with different strength in the course of crushing. After crushing, the cumulative mass content under each sieve at all levels and the sieve diameter ratio conform to the geometric fractal characteristics, and the fractal dimension is influenced by the material strength, the initial mixing ratio, and the initial void ratio. On this basis, the fractal dimension of recycled mixed coarse aggregates is determined by the crushing test, and the gradation of recycled mixed coarse aggregates for pavement base or subbase is then determined by fractal dimension. Finally, the mixing amount of recycled clay bricks in recycled mixed coarse aggregates for pavement base or subbase is discussed.

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“…Zhang and Zong (2013) also confirm the value of water absorption of 16.58%. For comparison, the value of NA is about 1.45% [ 17 ]. Another study reported a coefficient of water absorption of 15.5% to 18.3% depending on the grain size of the RBA [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Influence of Specific Surface Treatments of RBA on a Set of Properties of Concrete

Ondová

Sičáková

2016

Materials

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High water absorption of recycled brick aggregate (RBA) is one of the most discussed parameters in terms of its application in the production of concrete—its influence on the amount of mixing water and, hence, the quality of the concrete, is usually considered negative. In this paper, different methods of decreasing the absorption of RBA and, consequently, the impact on the properties of concrete, are described. The RBA has been treated to decrease the water absorption capacity by impregnation approach using specific impregnators. Afterwards, the RBA samples have been dried at two different temperatures in the laboratory oven—20 and 90 °C. Concretes using 4/8 fraction of the treated RBA instead of natural aggregate (NA) have been mixed and tested. The effectiveness of the RBA treatments have been evaluated on the basis of their influence on the properties of the hardened concrete; by means of the following tests: flexural strength, compressive strength, capillarity, total water absorption capacity, depth of water penetration under pressure, and frost resistance. The method of ranking by ordinal scale has been used as it is suitable for the comparison of a large set of results, while results have been analyzed in terms of the most important technological parameter that influences the quality of the concrete-effective water content. Out of all the tested surface-treatments of RBA, treatment by sodium water glass has the best potential for reduction of the water/cement (w/c) ratio. When the effective w/c ratio is kept within standard limits, concretes containing treated RBA are possible to be specified for various exposure classes and manufacturing in practice. The experiment confirms that at a constant amount of mixing water, with decreasing water absorption of RBA, the effective amount of water in the concrete increases and, hence, the final properties of the concrete decrease (get worse). As the water absorption of the RBA declines, there is a potential for the reduction of the w/c ratio and improvement in the quality of the concrete.

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Properties of concrete made with recycled coarse aggregate from waste brick

Cited by 45 publications

References 18 publications

Use of recycled aggregates in pressed fly ash geopolymer concrete

Use of recycled aggregates in pressed fly ash geopolymer concrete

Determination of Gradation of Recycled Mixed Coarse Aggregates for Pavement Base or Subbase by Crushing Fractals

Evaluation of the Influence of Specific Surface Treatments of RBA on a Set of Properties of Concrete

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