Producing synthetic lightweight aggregates from reservoir sediments

Chen, How-Ji; Yang, Ming‐Der; Tang, Chao-Wei; Wang, Shun-Yuan

doi:10.1016/j.conbuildmat.2011.08.051

Cited by 96 publications

(51 citation statements)

References 18 publications

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“…In other words, industrial waste or municipal solid waste can be reused as a sustainable resource in the manufacturing process of artificial LWAs. After the successful production of artificial LWAs, natural LWAs with poor quality stability were gradually replaced by artificial LWAs [2,[8][9][10][11]. In particular, LWAs can be used to replace ordinary aggregates to produce lightweight aggregate concrete (LWAC).…”

Section: Introductionmentioning

confidence: 99%

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Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Chen

Tang

et al. 2018

Sustainability

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Self-consolidating lightweight aggregate concrete (SCLC) is a highly flowable and lightweight concrete. In this study, the properties of SCLC and prestressed SCLC members were tested and compared with those made of normal-weight self-consolidating concrete (SCC). The test results show that SCLC can be used for prestressed concrete members. The use of lightweight aggregates with a particle density larger than 1100 kg/m 3 can avoid the serious segregation of fresh concrete. In addition, the SCLC designed in this study can meet most of the SCC Rank 2 test standards, except for the V-funnel test. The water contained in the lightweight aggregates supplied sustained curing, so the level of drying shrinkage of the SCLC was lower than that of the conventional SCC. However, the level of creep of the SCLC was higher than that of the conventional SCC, because normal-weight aggregates are more able to inhibit the change of the concrete's volume. On-site test results show that after 180 days of prestressing, the prestress loss was about 5.35-6.83% for the full-size SCLC members, which was smaller than that for the conventional SCC members (about 8.19-9.06% loss).

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Section: Introductionmentioning

confidence: 99%

“…In recent years, the development of LWAs has focused on industrial waste or municipal solid waste as a raw material for reducing the use of natural resources [3][4][5][6][7][8][9][10][11][12]. In other words, industrial waste or municipal solid waste can be reused as a sustainable resource in the manufacturing process of artificial LWAs.…”

Section: Introductionmentioning

confidence: 99%

Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Chen

Tang

et al. 2018

Sustainability

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“…Preliminary analysis indicate the viability of utilizing calcined clay lightweight aggregate as building material, despite the high level of water absorption. Furthermore, the calcined clay lightweight aggregates show promising compatible characteristics relative to structural concrete [3][4][5][6] . However, to produce calcined clay lightweight aggregates with specific characteristics, such as low water absorption or high compressive strength, the production process requires adaption.…”

Section: Introductionmentioning

confidence: 99%

Calcined Clay Lightweight Ceramics Made with Wood Sawdust and Sodium Silicate

2016

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This paper aims to study the influence of including wood sawdust and sodium silicate in the production process of calcined clay lightweight ceramics. In the production process first, a sample used by a company that produces ceramic products in Brazil was collected. The sample was analysed by techniques of liquidity (LL) and plasticity (LP) limits, particle size analysis, specific mass, X-ray diffraction (XRD) and X ray fluorescence spectrometry (XRF). From the clay, specimens of pure clay and mixtures with wood sawdust (10%, 20% and 30% by mass) and sodium silicate were produced and fired at a temperature of 900 o C. These specimens were submitted to tests of water absorption, porosity, specific mass and compressive strength. Results of this research indicate that the incorporation of wood sawdust and sodium silicate in the ceramic paste specimens can be useful to make calcined clay lightweight ceramics with special characteristics (low values of water absorption and specific mass and high values of compressive strength), which could be used to produce calcined clay lightweight aggregates to be used in structural concrete.

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“…The production of lightweight aggregates (LWA) made from dredged sediments has been evaluated in many studies [26][27][28][29][30] and the results have shown their suitability for lightweight aggregate production due to their perpetual availability, homogeneity and mineralogical and chemical composition [26]. The practical use of dredged sediments into brick production as a suitable alternative to their current disposal paths has also been demonstrated [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Use of Reservoir Sediment through Partial Application in Building Material

Junáková

Junak

2017

Sustainability

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Sediment, often considered a by-product of various activities within river basin management to be disposed of, or a pollutant to be controlled, is increasingly being acknowledged as a resource in need of management. The paper deals with the possibility of reusing sediment from two Slovak reservoirs (Klusov and Ruzin) as an alternative raw material in concrete production. Concrete specimens were prepared by a combination of original reservoir sediment, reservoir sediment mechanically activated by dry milling, reservoir sediment mechanically activated by dry milling together with biomass incinerator fly-ash as a binder. To improve the strength properties of specimens, sodium hydroxide (NaOH) was used as a sediment activator. Mixtures containing 40% of binder replacement by the above-mentioned combinations of original and treated sediments were tested for flexural and compressive strengths after 28, 90 and 365 days of curing. The results showed that the mixtures prepared from sediments milled without and with addition of fly ash as cement replacement satisfied the strength requirements for the compressive strength class C16/20 according to the European standard except the composites prepared with NaOH as the sediment activator. Addition of NaOH into composites in the concentration of 5 M as an activator of sediment indicated the negative impact on compressive and flexural strengths and thus NaOH was not an effective pozzolanic activator for sediments. This study reveals that the sediment may be considered as 40% cement substitution in building materials.

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Producing synthetic lightweight aggregates from reservoir sediments

Cited by 96 publications

References 18 publications

Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Engineering Properties of Self-Consolidating Lightweight Aggregate Concrete and Its Application in Prestressed Concrete Members

Calcined Clay Lightweight Ceramics Made with Wood Sawdust and Sodium Silicate

Sustainable Use of Reservoir Sediment through Partial Application in Building Material

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