FLY ASH, LIMESTONE/CEMENT BLENDS BOOST COMPRESSIVE STRENGTHS

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Research in Mississippi shows that portland cement/limestone blends (PLC) result in notable compressive strength improvements in mixtures with high Class C fly ash replacement versus conventional Type I portland cement, say Jay Shannon and Dr. Isaac L. Howard, P.E., Mississippi State University, and V. Tim Cost, P.E., F.ACI, and Wayne M. Wilson, P.E., Holcim (US) Inc., in their 2015 TRB paper, Benefits of Portland-Limestone Cement for Concrete with Rounded Gravel Aggregates and Higher Fly Ash Replacement Rates.

 
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RCC proves ‘A-OK’ for Rebuilding Rural Roads

<table width="300" border="0" align="right" cellpadding="5"> <tr> <td>&nbsp;</td> </tr> <tr> <td>RCC is placed in Fayetteville Shale Play Area to accommodate heavy truck traffic resulting from the natural gas extraction boom. Different thicknesses and sub-bases were specified for comparison along the two-mile demonstration.

By Tom Kuennen

Roller-compacted concrete (RCC), followed by diamond grinding to smooth the surface, is the smart choice for rebuilding rural roads damaged by energy development truck traffic in Arkansas, according to new research presented at the 93rd annual meeting of the Transportation Research Board earlier this year in Washington, D.C.

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FRP Hybrids Make Encore Appearance at TRB 2014

PHOTOS: Aghahassani, Elbadry and Moravvej

After a strong showing in January 2013, glass and polymer fiber-reinforced polymer hybrid precast girders again dominated the technical presentations on precast technology and accelerated bridge construction at the 93rd annual meeting of the Transportation Research Board earlier this year in Washington, D.C.

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