00237975

Component

https://onlinepubs.trb.or...bproceedings/19/19-021.pdf

THE AUTHORS ADVANCE THE INTERESTING HYPOTHESIS THAT THE NATURE OF FROST HEAVE IN ROADS, THE SPALLING OF CONCRETE PAVEMENT, AND THE DISRUPTION OF MASONRY THROUGH FROST ACTION IS SUBSTANTIALLY THE SAME. IT HAS BEEN ESTABLISHED THAT FROST BOILS AND THE GREATER PART OF FROST HEAVING IS A RESULT NOT SO MUCH FO FREEZING OF MOISTURE PRESENT IN AND ONE SPOT IN SOIL CAPILLARIES BUT OF THE BUILDING UP TO ICE PLATES THROUGH MIGRATION OF MOISTURE FROM ROAD SHOULDERS AND SUB-GRADE WATER TABLES. THE SPALLING OF CONCRETE AND MASONRY MAY BE DUE NOT TO TOE FREEZING OF STATIC WATER WITHIN THE PORES OF THE MASS, BUT TO THE BUILDING UP OF ICE PLATES OR INCIPIENT ICE PLATES DUE TO MIGRATION FROM THE WARM SIDE. TO INVESTIGATE SUCH A CONCLUSION, A TEST WAS DEVISED THAT DUPLICATED AS NEARLY AS POSSIBLE THE NATURAL CONDITIONS. AS A FIRST STEP, STANDARD BUILDING BRICKS WERE TESTED WITH ONE END IN WATER ABOVE THE FREEZING POINT, THE OTHER END EXPOSED TO A TEMPERATURE BETWEEN 0 AND 10 DEG. F., AND THE MID-SECTION OF THE BRICK SURROUNDED BY INSULATION. PRELIMINARY TESTS ON A POROUS BRICK SEEM TO BEAR OUT THE ASSUMPTIONS, FOR THE BRICK SPALLED QUICKLY NEAR THE COLD END, PRODUCING A CLEAN FRACTURE WHICH WAS COATED WITH ABOUT 1 MM.OF CONTINUOUS ICE. /AUTHOR/

Vol 19, pp 281-283. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01490428

1940

Highway Research Board Proceedings

Digital/other

Defects; Frost heaving; Masonry construction; Migration; Moisture content; Motion; Pavement distress; Pavements; Spalling

Moisture movement

Geotechnology; Highways; Pavements

TRIS, TRB

Oct 3 1971 12:00AM