relation: https://khub.utp.edu.my/scholars/9903/
title: Influence of sulfuric and hydrochloric acid on the resistance of geopolymer cement with nano-silica additive for oil well cement application
creator: Ridha, S.
creator: Abd Hamid, A.I.
creator: Setiawan, R.A.
creator: Shahari, A.R.
description: Purpose: The purpose of this paper is to investigate the resistivity of geopolymer cement with nano-silica additive toward acid exposure for oil well cement application. Design/methodology/approach: An experimental study was conducted to assess the acid resistance of fly ash-based geopolymer cement with nano-silica additive at a concentration of 0 and 1 wt. to understand its effect on the strength and microstructural development. Geopolymer cement of Class C fly ash and API Class G cement were used. The alkaline activator was prepared by mixing the proportion of sodium hydroxide (NaOH) solutions of 8 M and sodium silicate (Na2SiO3) using ratio of 1:2.5 by weight. After casting, the specimens were subjected to elevated curing condition at 3,500 psi and 130°C for 24 h. Durability of cement samples was assessed by immersing them in 15 wt. of hydrochloric acid and 15 wt. sulfuric acid for a period of 14 days. Evaluation of its resistance in terms of compressive strength and microstructural behavior were carried out by using ELE ADR 3000 and SEM, respectively. Findings: The paper shows that geopolymer cement with 1 wt. addition of nano-silica were highly resistant to sulfuric and hydrochloric acid. The strength increase was contributed by the densification of the microstructure with the addition of nano-silica. Originality/value: This paper investigates the mechanical property and microstructure behavior of emerging geopolymer cement due to hydrochloric and sulfuric acids exposure. The results provide potential application of fly ash-based geopolymer cement as oil well cementing. © 2018, Emerald Publishing Limited.
publisher: Emerald Group Publishing Ltd.
date: 2018
type: Article
type: PeerReviewed
identifier:   Ridha, S. and Abd Hamid, A.I. and Setiawan, R.A. and Shahari, A.R.  (2018) Influence of sulfuric and hydrochloric acid on the resistance of geopolymer cement with nano-silica additive for oil well cement application.  International Journal of Structural Integrity, 9 (5).  pp. 616-624.  ISSN 17579864     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053878213&doi=10.1108%2fIJSI-11-2017-0066&partnerID=40&md5=fe96ef44fcc013b899a435b61851bdfa
relation: 10.1108/IJSI-11-2017-0066
identifier: 10.1108/IJSI-11-2017-0066