粉煤灰和不同细度磨砂替代水泥对砂浆碱硅反应的影响

吉桑 吉安, 贾图 拉皮
曼谷城乡规划部

摘要

碱硅反应（ASR）是确保混凝土材料长期耐久性的重要考虑因素，特别是对于那些含有反应性骨料的材料。
尽管已证明粉煤灰（FA）可用于防止ASR膨胀，但目前的文献中并未明确定义填料效应和 FA细度对ASR膨胀的影
响。因此，本研究旨在检验填料和 FA细度对ASR砂浆膨胀的影响。具有两种不同细度的 FA被用于替代普通波特兰
水泥（OPC），其粘合剂的重量百分比为 20%。与 FA相同细度的河沙（RS）也被用于以与 FA相同的速率替代OPC。
本文用RS（一种惰性材料）代替OPC以观察 FA对ASR的填充效果。结果表明，与对照砂浆相比，FA和RS提供
了较低的ASR膨胀。本研究中的细粉煤灰和粗粉煤灰在减轻砂浆的ASR膨胀方面具有几乎相同的效果。对于填料
效果，较小颗粒的RS对ASR降低的影响大于具有较粗颗粒的RS。通过用 FA和RS部分替代来降低砂浆混合物中的
OPC含量，可以显着缓解ASR膨胀。

关键词

碱硅反应；混合水泥；填料；水泥基材料；粉煤灰；砂浆

参考

[1]Topçu, ˙I.B.; Bo ˘ga, A.R.; Billir, T. Alkali–silica

reactions of mortars produced by using waste glass as fine

aggregate and admixtures such as fly ash and Li2CO3. Waste

Manag. 2008, 28, 878–888.

[2]Aydın, S.; Karatay, Ç.; Baradan, B. The effect of

grinding process on mechanical properties and alkali-silica

reaction resistance of fly ash incorporated cement mortar.

Powder Technol. 2010, 197, 68–72.

[3]Lindgård, J.; Andiç-Çakır, Ö.; Fernandes, I.; Rønning,

T.F.; Thomas, M.D. Alkali–silica reactions (ASR): Literature

review on parameters influencing laboratory performance

testing. Cem. Concr. Res. 2012, 42, 223–243.

[4]Duchesne, J.; Bérubé, M.A. The effectiveness of

supplementary cementing materials in suppressing expansion

due to ASR: Another look at the reaction mechanisms part 1:

Concrete expansion and portlandite depletion. Cem. Concr.

Res. 1994, 24, 73–82.

[5]Ichikawa, T. Alkali–silica reaction, pessimum effects

and pozzolanic effect. Cem. Concr. Res. 2009, 39, 716–726.

[6]Turanli, L.; Uzal, B.; Bektas, F. Effect of large amounts

of natural pozzolan addition on properties of blended cements.

Cem. Concr. Res. 2005, 35, 1106–1111.

[7]Hong, S.Y.; Glasser, F.P. Alkali sorption by C-S-H

and C-A-S-H gels: Part II. Role of alumina. Cem. Concr. Res.

2002, 32, 1101–1111.

[8]Tangpagasit, J.; Cheerarot, R.; Jaturapitakkul, C.;

Kiattikomol, K. Packing effect and pozzolanic reaction of fly

ash in mortar. Cem. Concr. Res. 2005, 35, 1145–1151.

[9]Jaturapitakkul, C.; Tangpagasit, J.; Songmue, S.;

Kiattikomol, K. Filler effect and pozzolanic reaction of ground

palm oil fuel ash. Constr. Build. Mater. 2011, 25, 4287–4293.

[10]Kroehong, W.; Sinsiri, T.; Jaturapitakkul, C. Effect

of palm oil fuel ash fineness on packing effect and pozzolanic

reaction of blended cement paste. Procedia Eng. 2011, 14,

361–369.

[11]Esteves, T.C.; Rajamma, R.; Soares, D.; Silva, A.;

Ferreira, V.M.; Labrincha, J.A. Use of biomass fly ash for

mitigation of alkali-silica reaction of cement mortars. Constr.

Build. Mater. 2012, 26, 687–693.