REINFORCED CONCRETE

Evening Star, Issue 19802, 28 February 1928, Page 2

REINFORCED CONCRETE

“Ferro,” whose former articles on ‘ Modern Concrete Construction ’ created much interest in this page, has received the following letter from a correspondent, who signs himself “ Builder ” :

“ While regretting that you found it impossible to continue your articles on ‘ Modern Concrete Construction ’ through the medium of the builders’ column, might it not be asking too much a favor to reply in brief to the following questions?:— “ 1. Could you, in the light of modern theory, explain the advantages ol reinforced concrete over that of plain as regards cracking? “ 2. When does reinforced concrete in the mass separate under tension, and what is its relationship under similar stress to that of plain concrete? “3. Docs contraction of concrete, caused through shrinkage and degrees of temperature, create any stress of importance, and if sufficient steel is placed in correct positions wholly prevent visible signs of contraction and expansion ?

“4. Has tbo mixture, lean or otherwise, any effect upon contraction and expansion; if so, what would you recommend, from a practical and theoretical knowledge, tho correct procedure to eliminate tho possibility of cracking?” “Ferro” will reply to these questions in next week’s issue.