Utilization of the sludge derived from dyestuff-making wastewater coagulation for unfired bricks

Liu, Zhenhong; Chen, Quanyuan; Xie, Xuebao; Xue, Gang; Du, Feng; Ning, Qiuyan; Huang, Li‐Bo

doi:10.1016/j.conbuildmat.2010.10.012

Cited by 42 publications

(14 citation statements)

References 24 publications

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“…Research on the recycling of CDR into ceramic materials is extremely scarce. There are few studies on the technological behavior of CDR in ceramic materials, with the exception of a few studies on lightweight aggregates [29,30] and some papers on clay-based building ceramics [31][32][33][34][35][36][37][38][39][40]. In general, these studies concluded that CDRs can be used as major ingredients, but that its processing indications are contradictory (e.g., relevant variation of the firing sintering temperatures).…”

Section: Introductionmentioning

confidence: 99%

Recycling Construction and Demolition Residues in Clay Bricks

et al. 2021

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In recent years, the management of construction and demolition residues (CDRs) has become a major challenge for the construction industry due to the increasing volume of waste produced and its associated environmental impact. The aim of this article is to assess the effect of fine-grained fractions (<0.125 mm–0.6–0.125 mm) of construction and demolition residues, obtained by industrial sorting in a CDR processing plant in Rovigo (Italy), on the technological behavior and technical performance of clay bricks. Simulating the brickmaking process on a laboratory scale, it was appraised whether the CDR additions determined any change in the main properties of both fired and unfired bricks, taking a CDR-free brick body as a reference. The results indicated that the use of CDR is technologically feasible. It is possible to obtain, through proper crushing and sorting operations, grain-sized fractions with quite homogenous chemical and mineralogical composition. The residues did affect the compositional properties, porosity and water absorption of the clay bricks. Nevertheless, the characterization of the residual-added semi-finished and fired products highlighted their good technological and mechanical properties, which allowed them to provide performances similar to those of standard bricks manufactured with raw natural materials.

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Section: Introductionmentioning

confidence: 99%

Recycling Construction and Demolition Residues in Clay Bricks

et al. 2021

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“…For C8GG10Q5G2, the compressive strength and weight loss drop to the lowest value of 4.1% and 0.75% after 15 freezing/thawing cycles, respectively. e reason for the decreased compressive strength and weight loss can be explained by the results of many previous researches [33][34][35]. During the freezing/thawing cycles, the pore water changes into ice, and these ices can displace sandy soil particles, disrupting the interlocking of sandy soil particles, dilating the pore volume, and increasing microcracks' size.…”

Section: Bulk Density Of the Un Red Bricksmentioning

confidence: 99%

Utilization of Sandy Soil as the Primary Raw Material in Production of Unfired Bricks

Tao

Pan

Qiao

et al. 2018

Advances in Materials Science and Engineering

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In this study, attempts were made to use sandy soil as the main raw material in making unfired bricks. e sprayed-cured brick specimens were tested for compressive and flexural strength, rate of water absorption, percentage of voids, bulk density, freezing/thawing, and water immersion resistance. In addition, the microstructures of the specimens were also studied using scanning electron microscope (SEM) and X-ray diffraction (XRD) technique. e test results show that unfired brick specimens with the addition of ground-granulated blast-furnace slag (GGBS) tend to achieve better mechanical properties when compared with the specimens that added cement alone, with GGBS correcting particle size distribution and contributing to the pozzolanic reactions and the pore-filling effects. e test specimens with the appropriate addition of cement, GGBS, quicklime, and gypsum are dense and show a low water absorption rate, a low percentage of voids, and an excellent freezing/thawing and water immersion resistance. e SEM observation and XRD analysis verify the formation of hydrate products C-S-H and ettringite, providing a better explanation of the mechanical and physical behavior and durability of the derived unfired bricks. e results obtained suggest that there is a technical approach for the high-efficient comprehensive utilization of sandy soil and provide increased economic and environmental benefits.

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“…Several studies have demonstrated the feasibility of using sewage sludge for the production of eco-construction materials, such as cement (Monzó et al, 2004;Cyr et al, 2007), lightweight aggregate (Liu et al, 2017), and ceramic tile (Jordan et al, 2005). Utilizing sewage sludge as ingredients in construction materials not only could reduce the production cost but also provide ecological and energy saving advantages (Wang et al, 2008;Liu et al, 2011;Tyagi and Lo, 2013). Despite an estimated 10,000 TPD of waterworks sludge generated globally, few studies have focused on its resource recovery (Babatunde and Zhao, 2007).…”

Section: Graphical Abstract | Concept Of the Studymentioning

confidence: 99%

Biorefining Waste Sludge From Water and Sewage Treatment Plants Into Eco-Construction Material

Cheng

Huang

et al. 2019

Front. Energy Res.

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This study aims to investigate the feasibility of using different waste sludge and coal combustion residuals in eco-concrete block production. The compressive strength of the eco-concrete blocks produced by waterworks sludge, bottom and fly ashes were 36 MPa, which comply with the standard specifications for paving blocks in Hong Kong. The optimal mixing proportion (by weight) of different materials in the blocks, such as aggregates, cementitious materials, water, and fly ash was 1.1:1.0:0.5:0.22, respectively. The environmental and toxicological impacts of the final products were then evaluated according to the toxicity characteristic leaching procedure (TCLP). While several heavy metals (i.e., Hg, Cu, and Pb) have been identified in the specimens, the levels of these contaminants complied with Standards (US 40 CFR 268.48). Waste materials generated from water and sewage treatment processes and power plants are feasible to be used as ingredients for paving concrete block production. These products are environmentally acceptable and mechanically suitable for resource recovery of waste materials.

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Utilization of the sludge derived from dyestuff-making wastewater coagulation for unfired bricks

Cited by 42 publications

References 24 publications

Recycling Construction and Demolition Residues in Clay Bricks

Recycling Construction and Demolition Residues in Clay Bricks

Utilization of Sandy Soil as the Primary Raw Material in Production of Unfired Bricks

Biorefining Waste Sludge From Water and Sewage Treatment Plants Into Eco-Construction Material

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