Crushed Limestone Dust Valorization for Eco Friendly non Fired Wall Tiles

Abstract

Abstract. Utilizing crushed limestone dust; the by-product of crushing limestone plant for producing non-fired wall tiles is the objective of this research. The main raw materials of non-fired wall tiles consist of laterite soil, fluvial sand and Portland cement. The crushed limestone dust has been used as the substitute material of non-fired wall tiles for enhancing their bending strength. In this experiment, four groups of formulas have been constructed. Firstly, crushed limestone dust has been mixed into the basic formula for substitution of laterite soil. Secondly, crushed limestone dust has been used for substitution to river soil of the basic formula. Thirdly, it has been substituted to Portland cement in the basic formula. Finally, the best formulas of the first three groups has been selected and mixed up to make the new formulas. After mixing the raw materials of selected formula, forming specimens by uni-axial pressing at 100 bar has been performed. Then, they have been aged for 1 week at the room temperature. After that, testing the specimens' properties has been carried out. They are bending strength and water absorption which comparing with Thailand Industrial Standard (TIS) 614-2529. The experimental results show that adding the crushed limestone dust to the basic composition has an effect on the bending strength and water absorption. The compositions of the best formula are laterite soil 55%, fluvial sand 7.5%, Portland cement 22.5%, and crushed limestone dust 15%. It gives the bending strength by 2.32 MPa, water absorption 3.20%. The water absorption property can pass the TIS standard, but bending strength could not pass. The estimated cost of raw materials is 0.09065 THB/100 g.

Enhancement Bending Strength of Non Fired Wall Tiles by Recovering Sand-Wastes By-Products from Kaolin Beneficiation Process

“…Materials. Three basic materials used in this study are same as previous studies which are laterite soil, fluvial sand and Portland cement type I [9][10][11]. Sand wastes from kaolin mining had been utilized as alternative material for producing the eco-friendly non-fired wall tile.…”

“…Better physical properties of product are achieved with 2.32 MPa, 3.20% of bending strength, water absorption. It utilizes 15% of crushed lime stone dust [10]. Investigation for using sediment soil from water supply process was studied by Wangrakdiskul& Neamlut (2018).…”

Reutilizing Sediment Soil Wastes from Water Supply Treatment Process as Replacement Materials of Non-Fired Wall Tiles

“…Due to the lowest concentration SiO 2 of sediment soil, it decreases the bending strength when added to the basic formula (no.1_1, no.2_1). Moreover, water absorption of specimens also increase as decreasing bending strength [12,13].…”

“…Wangrakdiskul et al have proposed non fired wall tiles by utilizing wastes from palm oil industry [12]. Furthermore, using Crushed Limestone Dust as replacement material of non-fired wall tiles has been developed by Wangrakdiskul et al [13].…”