Fabrication of porous geopolymers utilizing aluminum wastes as foaming agent

IF 0.7 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of metals, materials and minerals Pub Date : 2024-06-04 DOI:10.55713/jmmm.v34i2.1966

Siriwan Chokkha, J. Ayawanna, A. Poowancum, Thanasak Singlaem, P. Mitsomwang

引用次数: 0

Abstract

Porous geopolymers (PG) are attractive due to their simple fabrication and diverse applications. This work presents a method for fabricating PG by using aluminum salt slag (ASS) as a foaming agent and metakaolin (MK) as the precursor. Sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) are used as alkali activator solutions. The results show that the PG is fabricated by using the sequence mixing method. ASS was milled to a size of 4 µm, then mixed with an NaOH solution for 30 min. After that, MK and Na2SiO3 solution were added. The weight ratio of Na2SiO3/NaOH and solid/liquid was 2.0 and 0.6, respectively. The 7-day cured PG with 5 wt% ASS achieves a strength of 15 MPa, which is close to the minimum requirement of Portland cement of 19 MPa. PG strength decreases, while setting time and pore size increase with increasing ASS content. The knowledge of this work enables the utilization of ASS as a valuable geopolymer foaming agent.

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利用铝废料作为发泡剂制造多孔土工聚合物

多孔土工聚合物（PG）因其制造简单、应用广泛而极具吸引力。本研究提出了一种使用铝盐渣（ASS）作为发泡剂和偏高岭土（MK）作为前驱体来制造多孔土工聚合物的方法。硅酸钠（Na2SiO3）和氢氧化钠（NaOH）用作碱活化剂溶液。结果表明，PG 是通过顺序混合法制造的。先将 ASS 研磨至 4 µm，然后与 NaOH 溶液混合 30 分钟。然后加入 MK 和 Na2SiO3 溶液。Na2SiO3/NaOH 和固体/液体的重量比分别为 2.0 和 0.6。7 天固化的含 5 wt% ASS 的 PG 强度达到 15 兆帕，接近波特兰水泥 19 兆帕的最低要求。随着 ASS 含量的增加，PG 强度降低，而凝结时间和孔径增加。这项工作的研究成果有助于将 ASS 用作一种有价值的土工聚合物发泡剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of metals, materials and minerals MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.40

自引率

11.10%

发文量

期刊介绍： Journal of Metals, Materials and Minerals (JMMM) is a double-blind peer-reviewed international journal published 4 issues per year (starting from 2019), in March, June, September, and December, aims at disseminating advanced knowledge in the fields to academia, professionals and industrialists. JMMM publishes original research articles as well as review articles related to research and development in science, technology and engineering of metals, materials and minerals, including composite & hybrid materials, concrete and cement-based systems, ceramics, glass, refractory, semiconductors, polymeric & polymer-based materials, conventional & technical textiles, nanomaterials, thin films, biomaterials, and functional materials.