Mixture proportioning for alkali-activated slag-based concrete

Author(s): Ning Li, Caijun Shi, Zuhua Zhang, Deju Zhu
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 377-377
Total Pages: 1
Language : English

Abstract: This paper reports a general mix design procedure for alkali-activated slag concrete, which
is an essential step towards industrial application of this new type of materials. The procedure
includes 1) determination of coarse and fine aggregate ratio according to close packing model,
as determined by measuring mixed bulk density; 2) determination of liquid phase (water content
and activator) based on compressive strength; 3) determination of excess paste content by
workability measurement. Effects of mix proportional factors, including activator composition,
water content, fly ash content, and binder/aggregate ratio are examined on consistency, setting
time and compressive strength. The relationship between performance and precursor

composition is established using simplex centroid design method, by which a range of alkali-
activated concretes with compressive strength grades of C40, C60, and C80 are successfully

prepared with initial setting time of 1 to 3 h and slump of more than 200 mm.
Keywords: alkali-activated concrete, proportional design, simplex centroid design method,
slump, setting time, compressive strength
International Conference on Sustainable Materials, Systems and Structures (SMSS

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00