Feasibiliy Test of Low-strength Concrete Recipe for M310-type Reactor
The performance and characterization data of low-strength concrete for M310-type reactor deserve attention. Through the feasibility test of concrete recipe of unit BL15 of 5/6 Tianwan plant,it was found differences in slump de-gree,temperature and compressive strength of the concrete from initial mixing to pump outlet.Results showed that the a-mount of fine material pumped concrete should be higher than 450 kg/m3 .The concrete would experience slump loss upon entering the pump.Under the presence of admixture was not obvious,and 90 min loss was 20～30 mm.The temperature increase from initial mixing to mould inlet was equal to the sum of pump inlet-initial mixing temperature difference and pump inlet-outlet temperature difference.There could be found small strength difference of concrete before and after ente-ring the pump,and slightly higher average value but also larger discreteness in strength of pump outlet compared with ini-tial mixing.
万方数据
维普
