| 1. | The polyacrylonitrile have no use to improve the homogeneity of concrete . the homogeneity of concrete have bad effect to compression strength , but the effect to chloride ion coefficient of diffusion is not obvious . for concrete used generality , if it ’ s homogeneity is acceptable ( k 7 % ) , the percentage of lost of the compression strength will lower than 10 %
匀质性对抗压强度的影响较大,对氯离子渗透系数的影响不明显,对于一般用途的混凝土,匀质性良好( k 4 % )时,强度损失在5 %以内,匀质性合格( k 7 % )时,强度损失在10 %以内;对于深层浇注的混凝土,离析度k 3 %时上下层强度的差异率才能保证在5 %以内。 |
