TY - GEN
T1 - Creep Response of Rubberised One-Part Alkali-Activated Concrete
AU - Elzeadani, Mohamed
AU - Bompa, Dan V.
AU - Elghazouli, Ahmed Y.
N1 - Funding Information:
The first author acknowledges the funding provided by the President’s PhD Scholarship at Imperial College London for his research studies. The authors are also grateful to the technical staff at the Structures Laboratory of Imperial College London, particularly Mr. Les Clark and Mr. Bob Hewitt, for the assistance provided during the experimental work of this study.
Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2023
Y1 - 2023
N2 - This paper presents the creep deformations and long-term constitutive behavior of rubberised one-part alkali-activated concrete. Blast furnace slag and fly ash are used as the main and secondary aluminosilicate precursor, respectively, while anhydrous sodium metasilicate is employed as a solid activator. Crumb rubber particles are used to replace up to 60% by volume of the total natural aggregates. Specimens are allowed to cure at ambient conditions for 28 days, and the creep specimens are then subjected to two compressive stress levels of 10 and 20% of the 28-day strength, which are sustained for a period of one-year. Results show a deterioration in the compressive strength and elastic modulus with higher rubber content. The long-term strength properties of the creep specimens and their unloaded counterparts are lower than similar specimens tested at 28 days. The axial and lateral crushing strains of the specimens tested at the end of the creep test are higher than similar specimens tested at 28 days. The creep strains increase as the creep load increases but reduce with higher rubber content. The specific creep and creep coefficients show a reduction as the creep load increases from 10 to 20% of the 28-day compressive strength but increase as the rubber content increases. The creep coefficients of the non-rubberised specimens are significantly higher than those given by design equations in the CEB-FIP Model Code 2010, while the opposite is seen for specimens with high rubber content.
AB - This paper presents the creep deformations and long-term constitutive behavior of rubberised one-part alkali-activated concrete. Blast furnace slag and fly ash are used as the main and secondary aluminosilicate precursor, respectively, while anhydrous sodium metasilicate is employed as a solid activator. Crumb rubber particles are used to replace up to 60% by volume of the total natural aggregates. Specimens are allowed to cure at ambient conditions for 28 days, and the creep specimens are then subjected to two compressive stress levels of 10 and 20% of the 28-day strength, which are sustained for a period of one-year. Results show a deterioration in the compressive strength and elastic modulus with higher rubber content. The long-term strength properties of the creep specimens and their unloaded counterparts are lower than similar specimens tested at 28 days. The axial and lateral crushing strains of the specimens tested at the end of the creep test are higher than similar specimens tested at 28 days. The creep strains increase as the creep load increases but reduce with higher rubber content. The specific creep and creep coefficients show a reduction as the creep load increases from 10 to 20% of the 28-day compressive strength but increase as the rubber content increases. The creep coefficients of the non-rubberised specimens are significantly higher than those given by design equations in the CEB-FIP Model Code 2010, while the opposite is seen for specimens with high rubber content.
KW - Creep response
KW - Long-term behavior
KW - Mechanical properties
KW - One-part alkali-activated concrete
KW - Rubberised concrete
UR - http://www.scopus.com/inward/record.url?scp=85164015304&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-32519-9_28
DO - 10.1007/978-3-031-32519-9_28
M3 - Conference article published in proceeding or book
AN - SCOPUS:85164015304
SN - 9783031325182
T3 - Lecture Notes in Civil Engineering
SP - 298
EP - 308
BT - Building for the Future
A2 - Ilki, Alper
A2 - Çavunt, Derya
A2 - Çavunt, Yavuz Selim
PB - Springer Science and Business Media Deutschland GmbH
T2 - International Symposium of the International Federation for Structural Concrete, fib Symposium 2023
Y2 - 5 June 2023 through 7 June 2023
ER -