Effect of rice husk ash-derived activator on the structural build-up of alkali activated materials

被引：49

作者：

Alnahhal, Mohammed Fouad ^{[1
]}

Hamdan, Abdelrahman ^{[1
]}

Hajimohammadi, Ailar ^{[1
]}

Kim, Taehwan ^{[1
]}

机构：

[1] Univ New South Wales, Ctr Infrastruct Engn & Safety, Sch Civil & Environm Engn, Sydney, NSW 2052, Australia

来源：

CEMENT AND CONCRETE RESEARCH | 2021年 / 150卷

关键词：

Alkali activated materials; Rice husk ash; Sodium silicate; Structural build-up; Ultrasonic pulse waves; SITU ATR-FTIR; SODIUM-SILICATE; COMPRESSIVE STRENGTH; WASTE GLASS; GEOPOLYMER; CEMENT; METAKAOLIN; CARBON; PERFORMANCE; CONCRETE;

D O I：

10.1016/j.cemconres.2021.106590

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Waste-derived sodium silicates (SSs) were synthesised from rice husk ash (RHA) to produce alkali activated materials (AAMs) using fly ash and slag as precursors. The effects of these SSs on the structural build-up were investigated by monitoring the evolution of the viscoelasticity, ultrasonic pulse waves, setting time, and infrared spectra. Two types of RHA derived SSs (filtered SS and unfiltered SS) were prepared to investigate the effect of the undissolved residue on the hardening process. The derived SS contained a large portion of monomer silicate species. The results showed that the structural build-up mechanism was comparable between the AAMs activated by the filtered SS and a commercial SS. The unfiltered SS increased the yield stress of the paste by up to 10 times. However, the residues in the unfiltered SS had insignificant impacts on the gel formation and compressive strength when using identical SiO2/Na2O and Na2O/binder ratios in the mix design.

引用

页数：13

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