Title: Self-Consolidating Concrete using FRAP and High Volume of Supplementary Cementitious Materials

Author(s): Yasser Khodair, Arif Iqbal, and Mohammed Hussaini

Publication: Symposium Paper

Volume: 334

Issue:

Appears on pages(s): 136-152

Keywords: self-consolidating concrete; cementitiuous materials; shrinkage; recycled asphalt pavement; fly ash, slag, fresh properties, hardened properties

DOI: 10.14359/51720257

Date: 9/30/2019

Abstract:
This study discusses the results of an experimental program conducted to study the fresh, hardened and unrestrained shrinkage characteristics of self-consolidating concrete (SCC) using fine recycled asphalt pavement (FRAP) and high volume of supplementary cementitious materials (SCMs) including class C fly-ash (FA) and slag (S). Sixteen mixtures were prepared with different percentages of FA, S, and FRAP. SCC mixtures were divided into four groups where each group had a different percentage of FRAP replacing fine aggregate (10%, 20%, 30%, 40%) and Portland cement being replaced by different percentages of SCMs. The water to cementitious material (w/cm) ratio of 0.4 was used for SCC mixtures with a target slump flow higher than 500 mm. The flowability, deformability, filling capacity and resistance to segregation were measured to determine the fresh properties of the mixtures. Moreover, the compressive strength at 14, 28, and 90 days and split tensile strength at 28 days were determined and durability characteristics including unrestrained shrinkage up to 90 days were tested. Analysis of experimental data showed that most of the mixtures satisfied the SCC fresh properties requirements. The addition of FRAP had an adverse effect on the compressive, tensile strength and unrestrained free shrinkage of SCC mixtures.