Control of Concrete Cracking in Bridges (2017) / Chapter Skim
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Pages 40-43
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From page 40... ...
40 Curing PraCtiCes Plastic shrinkage cracks occur in the top surface of concrete when job conditions are so dry that moisture is removed from the surface at a faster rate than it is replaced by bleed water (ACI Committee 224 2008)
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41 FIGURE 14 Application of wet burlap within minutes of strike off (Courtesy: Michigan DOT)
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42 strengths higher than specified by structural design are not required and can exacerbate deck cracking. Higher concrete compressive strengths can require additional cementitious materials that produce concretes with higher shrinkage, higher tensile strength, and higher modulus of elasticity.
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From page 43... ...
43 Babaie and Fouladgar (1997) pointed out that flexural transverse cracks over supports of continuous structures can be lessened by placing concrete in the center portion of adjacent spans before placing the concrete over the supports.
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