✦ LIBER ✦

The frost-resistance of concrete

✍ Scribed by Collins, A. R.

Publisher: Wiley (John Wiley & Sons)
Year: 1943
Weight: 449 KB
Volume: 62
Category: Article
ISSN: 0368-4075
DOI: 10.1002/jctb.5000620801

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✦ Synopsis

THE FROST-RESISTANCE OE CONCRETE*t ' By A. R. COLLINS This note discusses the wnys in which frost dnninges concreto and describes certnin serious fnilurcs thnt OCCIIITCI~ in the wvem winter of 1041-42. It is shown how frost fnilom mny take place either in tho nggregntc, if this is pnrticiilnrly porous. or in the cement pnste. Aggrcgntes of low resistnnm nm mnnonnbly well known nnd om not often tlic cnum of troublo. Tho scrious fnilurcs described all occurred in the cement pnste. Tho porosity of concreta in relution to frost-resistance is d i s c n d . Methods of monsuring tho elTeet of fmzing nm doscribed nnd rcsultq showing chnngcs in modulus of elmticity nnd crushing strength nro given. As n result of testa nnd of prncticnl exprienec, i t is recommended that .in this country to ensure freedom from dnmngc tho nverngo wntercement rntio should not exceed nbout 0.7 by weight. The wnys in which it m n bo restricted to this vnliio nre described. The cITecta of ndminturoe on frost-resistnnm nm nlm briofly discussed. 111 iiorinal circuinstaiices concrete is a durable iiinterinl. It is used iii all kinds of exterior const,ructioiinl work in every type of 'Rend before tho Road and Building Materiale Qroup on &rch 17, 1013. t Crown Cflpyriglit remrvad.

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