EFFECT OF MINERAL ADMIXTURES ON THE PROPERTIES OF A SUSTAINABLE ULTRA-HIGH PERFORMANCE CONCRETE (UHPC)

Author(s): R. Yu, P. Spiesz and H.J.H. Brouwers
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 45-52
Total Pages: 8
Language: English

Abstract: To reduce the environmental impact of Ultra-High Performance Concrete (UHPC), a method to produce a sustainable UHPC is presented in this study. The design of the concrete mixtures is based on the aim to achieve a densely compacted cementitious matrix, employing the modified Andreasen & Andersen particle packing model. Fly ash (FA), ground granulated blast-furnace slag (GGBS) and limestone powders (LP) are used to replace cement, and their effects on the properties of the developed UHPC are analysed. The experimental results show that the influence of FA, GGBS or LP on the early hydration kinetics of cement in UHPC is very similar during the initial five days, while the hydration rate of the blends with GGBS is mostly accelerated afterwards. Due to the very low water amount and relatively high superplasticizer (SP) dosage in the UHPC, the pozzolanic reaction of FA is significantly retarded and the mechanical properties of the mixture with FA are relatively poor.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00