Utilization of seawater in high calcium fly ash alkali-activated paste cured at ambient temperature

被引：0

作者：

Wongkvanklom, Athika ^{[1
]}

Posi, Patcharapol ^{[2
]}

Bangsai, Chaiwat ^{[2
]}

Kasemsiri, Pornnapa ^{[3
]}

Foytong, Piyawat ^{[3
]}

Rukzon, Sumrerng ^{[4
]}

Chindaprasirt, Prinya ^{[5
,6
]}

机构：

[1] Kasetsart Univ, Fac Sci & Engn, Dept Civil & Environm Engn, Chalermphrakiat Sakon Nakhon Prov Campus, Sakon Nakhon 47000, Thailand

[2] Rajamangala Univ Technol Isan, Fac Engn, Dept Civil Engn, Khon Kaen Campus, Khon Kaen 40000, Thailand

[3] Khon Kaen Univ, Fac Engn, Sustainable Infrastructure Res & Dev Ctr, Khon Kaen 40002, Thailand

[4] Rajamangala Univ Technol Rattanakosin, Fac Engn, Dept Civil Engn, Nakhon Pathom 73170, Thailand

[5] Khon Kaen Univ, Fac Engn, Sustainable Infrastruct Res & Dev Ctr, Dept Civil Engn, Khon Kaen 40002, Thailand

[6] Royal Soc Thailand, Acad Sci, Bangkok 10300, Thailand

来源：

ADVANCES IN CONCRETE CONSTRUCTION | 2024年 / 18卷 / 05期

关键词：

alkali activated paste; high calcium fly ash; seawater; setting time; strength; COMPRESSIVE STRENGTH; MECHANICAL-PROPERTIES; GEOPOLYMER CONCRETE; MICROSTRUCTURES; WORKABILITY; AGGREGATE; WATER;

D O I：

10.12989/acc.2024.18.5.369

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The influence of seawater upon high calcium fly ash alkali activated paste (AAP) on setting time and strength was studied. The materials included high calcium fly ash, sodium hydroxide (NaOH), sodium silicate (NS) and seawater. Setting time and compressive strength of the mixes were tested. The variables included seawater content, liquid to fly ash ratio, NaOH concentration, and NS/NaOH ratio. All mixes were cured at ambient temperature. Seawater was used instead of distilled water to prepare NaOH solution. The incorporation of seawater resulted in the shortening of setting time and increasing compressive strength. The strength enhancement was highly significant when the seawater is used with low NaOH concentration of 5 molar which is cost attractive. The use of seawater with short setting time and sufficiently high strength AAP is useful in applications such as patch repair of pavement and sidewalk, precast sections and other applications in places such as remote coastal areas and islands where fresh water is scarce.

引用

页码：369 / 378

页数：10

共 45 条

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