Effect of Fly Ash on Creep of High Performance Concrete Used in Bridge

Abstract:

W/C ratio and the quantity of fly ash added have obvious influence on creep of high performance concrete. Effect of different quantities of fly ash on creep of high performance concrete of different W/C ratios used in bridge is studied in this research whose results reflect that creep value reduces along with reduction of W/C ratio at a certain quantity of fly ash added. Adding fly ash restrains creep on the whole, however, the degree depends on the quantity of fly ash added. Creep value of high performance concrete mixed with class-I fly ash at blend ratio of 12~40% is lower than that of standard concrete and fly ash at blend ratio of 18% has the best effect. Creep value in 365d is 51% of that of standard concrete at fly ash blend ratio of 18%, while at fly ash blend ratio of 40%, creep value in 365d is lower than that of standard concrete but higher than that of concrete at other blend ratios. It is generally considered that inhibition of creep of high performance concrete begins to fall beyond blend ratio of 30%.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 2192-2195
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.2192
• Online since: October 2012
• Authors: Liang Liang Zhang, Li Qun Wu, Jian Xin Yang, Kang Zhang
• Keywords: Creep, High-Performance Concrete (HPC), Long Span Bridge

References

[1] Zhongwei Wu, Huizhen Lin. High Performance Concrete (in Chinese). China Railway Publishing House, Beijing, 1999.

[2] Neville A M. Properties of concrete. 3rd ed. [M] . London：Pitman Publishing Limited， 1981.

[3] Jianxi Zou, Xianjin Li, Peiyun Chi. Research on deformation performance of fly ash concrete[J] (in Chinese). Concrete (in Chinese), 2003(6)：38–42.

[4] GHOSH R S， TIMUSK J. Creep of fly ash concrete[J]. J Am Concr Inst, 1981, 78(5)：351–357.

[5] DAY R L. Strength，durability and creep of fly-ash concrete partⅡserviceability and durability of construction materials[A]. Proceedings of the First Materials Engineering Congress[C], Denver，1990. 864–873.

[6] Xudong Shao. Bridge Engineering (in Chinese). China Communications Press, Beijing, 2003.

[7] Honggen Qin, Wei Sun, Ganghua Pan et al. Research on properties of high performance concrete for bridge (in Chinese)[J]. Comprehensive Utilization of Fly Ash (in Chinese), 2002(5)：23–25.

[8] Pietro Lura，Klaas van Breugel，Ippei Maruyama. Autogenous and drying shrinkage of high-strength lightweight aggregate concrete at early ages-the effect of specimen size. In: Proceedings of RILEM Intemational Conference on Early Age Cracking in Cementitious Systems，Haifa，Israel， 2001：337-344.

DOI: 10.1617/2912143632.008

[9] PLOWMAN C，CABRERA J G. The use of fly ash to improve the sulfate resistance of concrete[J]. Fuel Energy Abstracts，1997，38(4)：233.

[10] POON C S， LAM L，WONG Y L. A study on high strength concrete prepared with large volumes of low calcium fly ash[J]. Cem Concr Res，2000，30(3)：447–455.

DOI: 10.1016/s0008-8846(99)00271-9

[11] OSBORNE G J. Durability of Portland blast-furnace slag cement concrete[J]. Cem Concr Compos，1999， 21(1)：11–21.

DOI: 10.1016/s0958-9465(98)00032-8

[12] ZHANG Yamei， SUN Wei，YAN Hangdong. Hydration of high-volume fly ash cement pastes[J]. Cem Concr Compos， 2000，22(6)：445–452.

DOI: 10.1016/s0958-9465(00)00044-5

[13] CHINDAPRASIRT P，HOMWUTTIWONG S，SIRIVIVATNANON V. Influence of fly ash fineness on strength，drying shrinkage and sulfate resistance of blended cement mortar[J]. Cem Concr Res， 2004，34(7)：1 087–1 092.

DOI: 10.1016/j.cemconres.2003.11.021