| 摘要 |
PURPOSE:To prevent the sedimentation and separation of aggregate having high sp. gr. and to obtain homogeneous heavyweight concrete by using a blend consisting of iron ore as coarse aggregate, iron sand as fine aggregate, water, cement, carbon fibers of a specified length and an org. polymer dispersion in specified ratios. CONSTITUTION:A blend consisting of 70-90wt.%, in total, of iron ore as coarse aggregate and iron sand as fine aggregate, 8-30wt.% cement paste having 0.3-0.7 ratio of water to cement and <=4wt.%, in total, of 0.05-1wt.% carbon fibers of 1-10mm length and 0.05-3wt.% (expressed in terms of solid matter) org. polymer dispersion satisfying 2-20 ratio of the org. polymer to the cement is charged into a mold, cured and hardened. The separation of the aggregate having high sp. gr. from the cement paste due to the difference in sp. gr. is prevented and homogeneous heavyweight concrete having high sp. gr. is obtd. |
