Title:
Phosphate Cement-Based Concretes Containing Silica Fume
Author(s):
Luong T. Hong and Adam S. Lubell
Publication:
Materials Journal
Volume:
112
Issue:
4
Appears on pages(s):
587-596
Keywords:
chopped glass fibers; fly ash; magnesium potassium phosphate cements; silica fume; textile glass fabrics
DOI:
10.14359/51687178
Date:
7/1/2015
Abstract:
Phosphate-based cements have been proposed as alternative binders to ordinary portland cements in concretes and mortars. This study investigated the rheological and mechanical properties of binders and sand mortars produced using a magnesium potassium phosphate cement (MPPC) in combination with silica fume and other supplementary cementing materials. A phosphonic acid retarder was used to control the setting time of the fresh mixtures. The influence of chopped glass fibers or textile glass fabrics on the properties was also examined. The introduction of silica fume within the binder resulted in significant increases in the compressive strength at both early and extended ages. At 90 days, the average modulus of rupture was 4.2% of the corresponding cylinder compressive strengths. Moderate increases in compressive strength and significant increases in flexural strength were observed after the addition of chopped glass fibers or textile glass fabrics.