Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Toxic waste


I was disappointed but not surprised with points made in the Down memory silane response to the article Non toxic concrete treatment trialled (NCE 1 July).

The reference to grandmother's cooking is humorous but based on misinformation. There have been a number of materials called pavix, including an asphalt rejuvenator. The product found to comply with the BD43/03 tests is called Chem Crete Pavix CCC100.

By any standard, Silane is toxic and this point should not be lost. The reader familiar with web browsers might key in 'silane+chemical warfare'. One of the many pages returned is tagged: Chemical Warfare Agents TIC's-HAZMATCAD Plus Nerve Gases Blister Agents Hydride. Gases Halogen Gases GA, GB, GD, GF, VX HD, HN3 Arsine, Diborane, Silane Chlorine. . .

I am happy to report that while Pavix CCC100 is good for concrete it regrettably would serve no useful purpose in grandmother's kitchen.

Prof Denis Chamberlain, City University, school of engineering and mathematics, Northampton Square, London, EC1 VOHB

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.