Title:
Self-Consolidating Mortars Using Various Secondary Raw Materials
Author(s):
Syed Ali Rizwan and Thomas A. Bier
Publication:
Materials Journal
Volume:
106
Issue:
1
Appears on pages(s):
25-32
Keywords:
microstructure; porosity; raw materials; self-consolidating mortars
DOI:
10.14359/56313
Date:
1/1/2009
Abstract:
A study made on 15 series of self-consolidating mortars (SCMs) using different types of secondary raw materials (SRMs) at high replacement levels of cement is reported. SRM particle characterization and the flow behavior, strength development, microstructure, and early volume stability of SCMs are reported. A simple procedure has been suggested for strength quantification of SCMs using various SRMs. The study demonstrates that shape, size, and surface morphology and porosity of SRMs play a very significant role in determining the water and high-range water-reducing admixture (HRWRA) demands of SCMs. SRM characterization also helps to understand various test results routinely performed on SCM systems. Based on the comparative tests, it can be said that limestone powder (LSP) alone is not the best SRM for selfconsolidating cementitious systems (SCCS). Suitable blends of fly ash (FA) and silica fume (SF) or LSP can be good SRMs for an improved overall response of SCMs using well-graded aggregates.