การพัฒนาอิฐบล็อกประสานจากดินตะกอนเหลือทิ้งมาใช้ประโยชน์ต่อชุมชน

Abstract

This paper aims to use sludge, waste material, from the electricity production process for local community benefits.  The chemical properties of sludge from power plant was analyzed by X-ray fluorescence (XRF). The result show that the sludge comprises high amounts of SiO₂ and Al₂O₃ as pozzolanic materials, mixed with fly ash and Portland cement to enhance strength of interlocking brick block. From 9 ratios of mixing tested in this study, the optimal ratio is a ratio of sludge: fly ash: Portland cement at 50: 50: 10 and the optimal concrete curing time is 28 days. The maximum compressive strength was 27.75 kilogram per square centimeter (ksc) and the water absorption value is lower than 14%. The interlocking brick block made from sludge was passed the criteria of Thai Industrial Standard (TIS) and suitable for use as non load bearing construction materials. The blocks sized 10 x 20 x 10 cm. were made from optimal ratio of sludge with the construct cost less than 10 Baht/piece. The blocks were used for construction materials in 3 landmark areas of the community nearby power plant and were received good cooperation and feedback.