Use of Ordinary Portland Cement and Nano-Silica in Fly Ash Based Geopolymer Concrete

  • Peem Nuaklong หลักสูตรปรัชญาดุษฎีบัณฑิต สาขาวิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Vanchai Sata รองศาสตราจารย์ ศูนย์วิจัยและพัฒนาโครงสร้างมูลฐานอย่างยั่งยืน ภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Prinya Chindaprasirt ศาสตราจารย์ ศูนย์วิจัยและพัฒนาโครงสร้างมูลฐานอย่างยั่งยืน ภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น น ยยย และภาคีสมาชิก ราชบัณฑิตยสภา สนามเสือป่า เขตดุสิต กรุงเทพมหานคร
Keywords: Geopolymer concrete, Ordinary Portland cement, Nano silica, Fly ash

Abstract

This study investigated the mechanical and durability properties of fly ash geopolymer concrete containing ordinary Portland cement (OPC) and nano-SiO2 (nS). OPC was used as a partial replacement of high calcium fly ash (HCF) in geopolymer concrete at the rate of 5, 10 and 15% by weight of binder. While, nS was added at the rate of 1, 2 and 3% by weight of HCF.  The slump flow, strength, water absorption, chloride penetration and sulfuric acid resistant of geopolymer concrete were tested. The results revealed that the use of OPC decreased the workability of geopolymer concrete and the use of nS resulted in little change in the workability.The use of both OPC and nS gave higher strength than that of geopolymer concrete with only fly ash. In addition, it was found that the use of OPC resulted in the improvement of chloride penetration of geopolymer concrete, while the resistant to sulfuric acid tended to decrease. The use of nS led to reductions in resistances to chloride penetration and acid attack.

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Published
2019-06-13
Section
บทความวิจัย