Concrete hydration reaction is increased with time and gradually improve, under normal maintenance in the first seven days compressive strength is gro...
The strength of the foam concrete of water and foam concrete related a lot to do.Generally the mixing proportion of concrete, are calculated on dry sa...
Definition: (1) with good steel wire on the machine that has made according to the regulations of more than a twisted into the winding prestressed ste...
1, ready for the tension before the work:
(1) T beam strength of concrete reaches 90% of the design strength before tensioning.
(2) good tension wit...
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