Concrete Contractors chime in on portland-limestone cement mixes

Sources: American Society of Concrete Contractors, St. Louis; CP staff The American Society of Concrete Contractors has kicked off a members-only “ALERT!” bulletin series with a look at portland-limestone cement concrete mixes. The two-page document reminds Society members how any new mix ingredient can trigger changes in concrete performance; lists variations contractors have reported with PLC mix loads; offers finishing…

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