EFFECT OF TYPES OF SUPERPLASTICIZER ON PROPERTIES OF PASTE AND MORTAR MADE WITH A BINDER OF BOTTOM ASH AND CALCIUM CARBIDE RESIDUE

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Author list: อรรคเดช อับดุลมาติน;วีรชาติ ตั้งจิรภัทร;ชัย จาตุรพิทักษ์กุล

Publication year: 2015

Journal: วารสารวิชาการสมาคมคอนกรีตแห่งประเทศไทย (2350-9260)

Volume number: 3

Issue number: 1

Start page: 31

End page: 41

ISSN: 2350-9260

URL: http://www.thaitca.or.th/journal/journals/year2015/v.3-1-4.pdf

Abstract

This research investigated the effect of melamine sulphonate (MS) and polycarboxylate (PC) superplasticizers on properties of paste and mortar using ground bottom ash (GBA) mixed with ground calcium carbide residue (GCR) as a binder. The optimum proportion between GBA:GCR was determined and it was found that the optimum proportion was 70:30 by weight to obtain the highest compressive strength. The effects of MS and PC superplasticizers on normal consistency and setting times of GBA-GCR pastes and compressive strengths of GBA-GCR mortars were investigated. The results showed that at the same dosage, PC superplasticizer could decrease more effectively the water demand at normal consistency than MS superplasticizer. The setting times of GBA-GCR pastes were between 235 to 390 min. However, the setting time of paste was shorter with the increased of PC superplasticizer dosage between 0.2 to 1.0% by weight of binder. With 0.2% by weight of binder, MS superplasticizer could reduce the setting time of paste but the setting time tended to increase with the increased of MS superplasticizer dosage from 0.5% to 1.0% by weight of binder. The highest compressive strength of GBA-GCR mortar at 90 days was 206 ksc. In addition, the mortar containing PC superplasticizer had higher compressive strength than that of mortar containing MS superplasticizer, especially at a low water to binder ratio (w

Keywords

Binder, Bottom ash, superplasticizer