The cause and mechanism of plastic shrinkage and its แตกร girl caused by shrinkage plastic model is vital. ายคลึง contraction ratio a net (Drying Shrinkage). And its แตกร girl caused by shrinkage model reflects the net (Drying Shrinkage Crack) only period contraction will mean a net financial contraction occurred after the concrete hardens and 2004 contraction plastic to severe weather in debt service. Its low moisture สัมพัทธ and windy, แตกร its long plastic shrinkage often 2002 parallel each other have a length of about 0.1 to 1 meters and depth 25 to 50 mm. The study found increased to its แตกร long plastic shrinkage will happen, the evaporation rate มากกว TA. 1 kg / m2 / hour.
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