Effect of Calcium Carbonate Addition on Hole Defect in Kab-Kluay Terracotta Roof Tile Products

Authors

  • Sarinya Prateepchanachai Rajabhat Rajanagarindra University Address: 422 Maruphong Road Tambon Muang, Chachoengsao 24000 Thailand.

Abstract

Calcium carbonate has some interesting qualities for applying in the terracotta roof tile product industry, but it could result in product defects, therefore, this studies to the consideration of calcium carbonate’s property in order to reduce the loss of products. This research purposed to study the composition, the chemical composition, the particle-size distribution, and the zeta potential of the raw materials for the production of Kab-Kluay terracotta roof tile products. According to the study of the composition, it was found that the 2θ was 25.76o, 28.76o, 29.47o, 32.06o, 32.88o, 34.21o, 39.77o 47.24o, 49.21o, and 50.99o; which are the diffraction pattern of calcium carbonate that confirm the cause of hole defect. From the analysis of the chemical composition of the 4 types of raw materials, which were ball clay, red ball clay, kaolin, and feldspar, then compose of silica, alumina, and hematite, respectively. The study of different calcium carbonate more than 20% by weight, it was found that the calcium carbonate has the size of particle less than 1.01, 0.96, and 1.09 µm have 10% by volume respectively, while the smaller size than 7.19, 7.35, and 9.21 µm having 50% by volume respectively. This results in a larger size compared to the formula used by the industrial factory and by adding 30% more of calcium carbonate by weight decreases particle diffusion by 4.42 and 3.56 respectively. Therefore, the addition formula with the best particle-size distribution was derived from the formula used by industrial factory combined with 20% by weight of calcium carbonate. Regarding the study of the zeta potential, it was found that calcium carbonate increases by 30% and 50% by weight cause a decrease of zeta potential without any significant differences at -57.8 and -58.0 mV, respectively. This may affect the clay particles agglomeration and plasticity of clay decrease. Keywords  :  calcium carbonate, particle-size distribution, zeta potential, hole defect

Author Biography

Sarinya Prateepchanachai, Rajabhat Rajanagarindra University Address: 422 Maruphong Road Tambon Muang, Chachoengsao 24000 Thailand.

Industrial Management Engineering Department, Faculty of Industrial Technology

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Published

2020-01-15