Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/213413

Title

Microcracking and strength development of alkali activated slag concrete

Author(s)

Collins, Frank;  Sanjayan, J. G.

Abstract

Alkali activated slag concrete (AASC) is made by activating ground granulated blast furnace slag with alkalis without the use of any Portland cement. This study investigates the level of microcracking which occurs in AASC when subjected to various types of curing regimes. The corresponding compressive strength developments of AASC were monitored. The level of microcracking were measured using three different types of tests: (1) frequency and size of surface cracks using crack-detection microscope (2) water sorptivity tests measuring absorption of water by capillary attraction and (3) mercury intrusion porosimetry (MIP) tests which measured the pore size distribution of AASC and AAS pastes (AASPs). The results show that the lack of moist curing of AASC increased the level of microcracking measured using all three different tests mentioned above. The strength development of AASC is also significantly reduced by lack of moist curing.

Publication type

Journal article

Source

Cement and Concrete Composites, Vol. 23, no. 4-5 (Aug-Oct 2001), pp. 345-352

Publication year

2001

FOR Code(s)

0905 Civil Engineering;  1202 Building

Keyword(s)

AASC;  AASPs;  Alkali activated slag concretes;  Alkali activated slag pastes;  Alkali metals;  Capillarity;  Compressive strength;  Concretes;  Curing;  Mercury intrusion porosimetry;  Microcracking;  Pore size;  Portland cement;  Slags;  Strength development;  Water absorption

Publisher

Elsevier

ISSN

0958-9465

Publisher URL

http://dx.doi.org/10.1016/s0958-9465(01)00003-8

Copyright

Copyright © 2001 Elsevier Science Ltd. All rights reserved.

Peer reviewed