DOES DEICING SALT DAM­AGE CON­CRETE?

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Some deicing chem­i­cals, at very high con­cen­tra­tions, can dam­age con­crete. But most of­ten, dam­age oc­curs this way: De­icers turn the ice to wa­ter, which seeps into con­crete pores. Later, the wa­ter freezes and ex­pands, caus­ing tiny craters in the sur­face. With each cy­cle, the dam­age grows worse. One way to re­duce this dam­age is to sweep or shovel melt­wa­ter and slush off the con­crete. Ma­sonry seal­ers also help by plug­ging the pores in con­crete.

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