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AAA CEMEXME v 13 for press.pmd - Cemex Philippines

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28 CEMEX+ME 1st Half of 2004 /MANILA, PHILIPPINES<br />

CEMEX<br />

answers your<br />

questions<br />

about<br />

cement,<br />

cement<br />

products,<br />

and other<br />

related<br />

topics. In this<br />

issue of CEMEX + Me,<br />

we’ll talk about how you<br />

can make more efficient<br />

use of cement through<br />

CEMEX’s specially<br />

<strong>for</strong>mulated products.<br />

Got questions? Fill out<br />

the question question question question question coupon coupon coupon, coupon coupon<br />

the yellow strip at the<br />

right end of the next<br />

page, and: (1) hand it to<br />

your ASM (Area Sales<br />

Manager); (2) fax it to<br />

849-3502 849-3502 849-3502; 849-3502 849-3502 or call the<br />

CEMEX Service Center<br />

at 849-3501. 849-3501 849-3501 849-3501 849-3501<br />

Ask CEMEX<br />

QUESTION I recently read<br />

that structures built near<br />

the water are more<br />

exposed to sulfates<br />

which can cause the<br />

concrete to deteriorate.<br />

I’m building a high-rise<br />

project near the seafront—what<br />

should I do<br />

to protect the concrete<br />

from these sulfates?<br />

ANSWER You’re right in<br />

saying that structures built near bodies of water are more vulnerable to what<br />

we call Marine Attack. This is why CEMEX recently developed a cement<br />

product specifically <strong>for</strong> structures built in or near bodies of water: CEMEX<br />

Marine. It is a high-strength Portland cement with high sulfate resistance and<br />

lower heat of hydration that makes it less prone to cracking and more resistant to<br />

sulfates. CEMEX Marine passes both Type I and Type V characteristics, and<br />

con<strong>for</strong>ms to the specifications of ASTM C150 and PNS 07.<br />

We introduced CEMEX Marine as a response<br />

to the damages that we have observed<br />

in concrete structures here in the <strong>Philippines</strong>—<br />

a country that is frequently visited by typhoons<br />

and has a sulfate-rich environment—but it is<br />

also being used in Spain, Egypt, Venezuela,<br />

and the United States.<br />

More about Marine Attack:Marine Attack,<br />

also known by others as sulfate attack, occurs<br />

when concrete comes into contact with water<br />

and soil containing sulfates (SO 4 ). Sulfates are<br />

found in: water, sea water, soil in volcanic<br />

environments, and even in acid rain—although<br />

in varying levels. These sulfates react with<br />

hydration products of the tri-calcium aluminate<br />

(C 3 A) that is present in concrete, causing the<br />

concrete to deteriorate.<br />

Marine Attack can occur because of elements<br />

in the soil, water, and air, and its effects<br />

can’t be reversed. Once a structure has already been hit by Marine Attack, the<br />

damaged part has to be removed and replaced with concrete that can resist<br />

sulfates, such as CEMEX Marine. That’s why it’s important to build a sulfateresistant<br />

structure right from the start.<br />

QUESTION I’ve heard that your new product, CEMEX Marine, is stronger<br />

than Ordinary Portland Cement. I also heard that it can resist sulfates that<br />

are found in the environment. Does its name mean that it’s applicable only<br />

<strong>for</strong> buildings that are built near the water?

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