Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 270, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.121432
Keywords
Microwave curing; Granulated blast furnace slag; Compressive strength; Hydration; Microstructure
Categories
Funding
- National Key Research and Development Program of China [2018YFC1801704]
- National Science-technology Support Plan of China [2012BA20B02]
Ask authors/readers for more resources
With the increase of GBFS content, the highest temperature and final water to binder ratios during microwave curing are slightly reduced. The existence of non-thermal effect of microwave in the composite system is indirectly proved through surface tension test. Compared with steam curing, microwave is easier to promote carbonation, and the reduction of harmful pores is an important factor for improving the compressive strength of mortar prepared with cement-GBFS composite binder.
To investigate the effects of microwave curing on the compressive strength development of mortar prepared with cement-Granulated Blast Furnace Slag (GBFS) composite binder and the underlying mechanism, the evolution of temperature and water to binder ratio during the curing, the hydration products and microstructure of composite system were studied. The results show that with the increase of the GBFS content the highest temperature achieved during microwave curing and the final water to binder ratios are reduced slightly. Through the surface tension test, the existence of non-thermal effect of microwave in composite system is indirectly proved. Compared with steam curing, microwave is easier to promote the carbonation of composite binder. In addition to the acceleration of hydration at early ages, the decrease of the number of harmful pores is an important factor for the improvement of compressive strength of mortar prepared with cement-GBFS composite binder. (C) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available