Preparation of Lightweight Ceramsite from Solid Waste Using SiC as a Foaming Agent

Abstract

SiC was chosen as the foaming agent, and river bottom silt, waste oil sludge, paint bucket slag, and fly ash were used as raw materials, to prepare lightweight ceramsite without adding any chemical additives. The effects of SiC dosing and sintering temperature on various properties of the ceramsite were studied, and the pore-forming mechanism of the lightweight ceramsite was clarified by thermal analysis and X-ray diffraction analysis. The results showed that the single ceramsite compressive strength, water absorption, bulk density, and porosity of ceramsite sintered at 1180 °C with 1.0% SiC were 2.15 MPa, 2.02%, 490 kg/m3, and 23.85%, respectively. The major mineralogical compositions were quartz, fayalite, and kyanite, with small amounts of albite-low from 1140 to 1190 °C. Furthermore, the concentration of all tested heavy metals from ceramsite was lower than the maximum allowable concentration of the leaching solution specified in the Chinese national standard (GB 5085.3-2007), which reveals that this solid waste ceramsite will not cause secondary environmental pollution. The prepared ceramsite, exhibiting lower bulk density, high water absorption and porosity, and effective solidification of deleterious elements, can be used to prepare green lightweight aggregate concrete. Importantly, preparation of solid waste ceramsite is an effective way to dispose of hazardous wastes.

Preparation and properties of lightweight and high-strength building ceramsites with oil-based drilling cuttings pyrolysis residues

“…The comparison of the bulk density, water absorption, and particle compressive strength of the ceramsite in this study with those reported in other literature was presented in Supplementary Table S4 (Sun et al, 2021;Pei et al, 2022;Shang et al, 2022;Jia et al, 2023;Li et al, 2023). It was worth noting that all primary raw materials utilized were industrial solid waste materials, and the produced ceramsite in this work demonstrated exceptional performance in terms of both compressive strength and density.…”

Ceramic Aggregate Material Formulated with MSWI Fly Ash and Fuel Ash for Use as Filter Media

“…In the raw material, 1 wt% of SiC was used as a foaming agent. Therefore, the following reaction would occur during the roasting stage [30]: The finished FMC was obtained by cooling the granules to room temperature, and its basic performance was measured.…”

Electricity generation in a ceramic separator microbial fuel cell employing a bacterial consortium for penicillin removal

“…A modified method was utilized to produce ceramsite, which is a lightweight ceramic ball using Akadama clay (Shang et al 2022). The clay has a pH of 6.9, an electroconductivity (EC) of 0.052 ms/cm, and a water absorption rate of 20%.…”