Message:

<p>[QUOTE=&quot;krispy, post: 2041494, member: 19065&quot;]<font size="4"><b><a href="http://newscenter.berkeley.edu/2013/06/04/roman-concrete/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://newscenter.berkeley.edu/2013/06/04/roman-concrete/" rel="nofollow">To improve today’s concrete, do as the Romans did</a></b></font></p><p><font size="4"><br /></font></p><p><font size="4">2013.06.04 <i>from</i> <a href="http://newscenter.berkeley.edu/2013/06/04/roman-concrete/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://newscenter.berkeley.edu/2013/06/04/roman-concrete/" rel="nofollow">http://newscenter.berkeley.edu/2013/06/04/roman-concrete/</a></font></p><p><font size="4"><br /></font></p><p><font size="4">&quot;In a quest to make concrete more durable and sustainable, an international team of geologists and engineers has found inspiration in the ancient Romans, whose massive concrete structures have withstood the elements for more than 2,000 years.&quot;</font></p><p><font size="4"><br /></font></p><p><font size="4">&quot;Using the Advanced Light Source at Lawrence Berkeley National Laboratory (Berkeley Lab), a research team from the University of California, Berkeley, examined the fine-scale structure of Roman concrete. It described for the first time how the extraordinarily stable compound – calcium-aluminum-silicate-hydrate <b>(C-A-S-H)</b> – binds the material used to build some of the most enduring structures in Western civilization.&quot;</font></p><p><br /></p><p>CASH! How appropriate for this forum! <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /> </p><p><br /></p><p><font size="4">The article above focuses in part on underwater concrete and reasons for it&#039;s durability. I have heard several times from Architecture professors that research has suggested that the composition of concrete in the dome of the Pantheon is different than in other structures, and that includes things other than just a concrete mix, things which take up space like fist sized pumice rocks which are very light and lessen the load pushing down from the massive domed roof. Pumice being exploded volcanic rock plays into the mix as the article suggests the Roman engineers used volcanic ash in the composition for maritime and other mortar applications. The Pantheon is a stunning building, absolutely nothing like it anywhere, IMO, which should be on any traveler&#039;s bucket list.</font></p><p><br /></p><p><font size="4">Can&#039;t wait to see what coin pics you guys post! <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie100" alt=":wideyed:" unselectable="on" unselectable="on" /></font>[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in