01594624

Component

Nanoparticles, including nanosilica and nano-clay, have been used to modify setting times, rheology, and mechanical strength of portland cement-based binder systems. Alkali activated binders have recently emerged as potentially sustainable materials which can be used to replace ordinary portland cement (OPC) in concrete. The present study evaluates the role of nanosilica and kaolinite clay on the compressive strength, workability, and porosity of alkali-activated slag mortars. Ground granulated blast-furnace slag (slag/AA-S) mortar with 1-2% dosages of nanosilica (NS) and 2-6% of kaolinite clay (KC) were evaluated here. Significant improvement in compressive strength of AA-S mortar was observed when modified by either nanosilica or kaolinite at different dosages. Workability and setting time of nanoparticle-modified AA-S mortar suffered. The porosity of said mortars was generally reduced.

This paper was sponsored by TRB committee AFN15T Task Force on Nanotechnology-Based Concrete Materials.

01584066

16-5897

English

13p

2016

Transportation Research Board 95th Annual Meeting

Digital/other

Figures; References; Tables

Alkali silica reactions; Bituminous binders; Clay; Compressive strength; Mortar; Porosity; Portland cement; Slag

Nanosilica

Highways; Materials

Transportation Research Board Annual Meeting 2016 Paper #16-5897

TRIS, TRB, ATRI

Jan 12 2016 6:36PM