| Super Absorbent Polymer (SAP) internal-curing method is a significant change inthe high-strength and high-performance concrete technology. It plays an importantrole in improving mechanical properties and durability properties of concrete. Thispaper made a systematic study on the law of SAP dosage and additional amount ofwater which influence mechanical properties, volume stability, frost resistance andexpanding properties of a variety of cementitious materials system of concretethrough a large number of experiments. And hydration products and hydrationmechanism of SAP-HPIC was studied and analyzed on the micro-level. Theprediction model of compressive strength of SAP-curing concrete based ontwo-dimensional normal distribution was established, which is an important basis ofthe high-performance concrete mix design. Through the establishment of theSAP-curing high performance concrete internal humidity field, an effective way wasfound for the quantitative analysis of the volume stability of concrete. The study onanti-freezing effect and mechanism of SAP mixing with cement, slag and fly ash ofdifferent combinations of system revealed the effects of SAP on hydration productsand the hydration processes of the concrete with different ages. The principles of thecoordinated development of expansion deformation and strength development ofhigh-performance concrete were discussed and paramemeters of SAP content andadditional amount of water were determined. |
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