Study on Reuse of Wasted Diatomite from Brewing Industry for Building Materials

Abstract

In order to solve environmental problems and reduce the cost of building materials, this study used waste diatomite from brewing industry to develop novel cement mortar and compared it with pristine one. After pretreatment with water, soaking, drying, it is shown in the microscope that the treated diatomite has recovered its porosity. The thermogravimetric analysis also showed that the purity of treated diatomite was greater than 93%, confirming that most of the originally adsorbed organic matter was removed. Further, the diatomite after the treatment was used to prepare a novel cement mortar, and it was found that the optimum compressive strength was obtained when the water-cement ratio was 0.65 and the amount of diatomite added was 20%. It was found that the average compressive strength after 28 days was 284.03 kg/cm2, which was 81.22 kg/cm2 higher than that of the pristine cement mortar. It is proved that the addition of diatomite can increase the strength of the cement mortar and effectively reuse the waste diatomite.

Pore structure and surface properties of diatomite with mechanical grinding and its influence on humidity control performance

“…These soils consist of individual particles containing intraparticle voids filled with water, resulting in a very unique porous particle morphology (Verdugo, 2008). It is widely used as adsorbent (Al-Degs et al, 2001;Khraisheh et al, 2004;Sheng et al 2009), filter aid (Seok-Ho et al, 1989;Ha et al, 2015), carrier (Hu et al, 2017c;Zhang et al, 2021), building material (Mingming & Zhang, 2017;Zheng et al, 2017;Shih et al, 2020) and environmental functional material (Du et al 2011;Quang-Tung et al 2016;Jiang et al 2019) for its advantages of high porosity, light mass and nontoxicity. It is widely distributed in the earth.…”