公开(公告)号：US20230159396A1

公开(公告)日：2023-05-25

申请号：US17984217

申请日：2022-11-09

申请人： Nano and Advanced Materials Institute Limited

发明人： Binmeng CHEN ,  Xuan LIU ,  Bin LIU ,  Man Lung SHAM

IPC分类号： C04B28/04 ,  C04B14/22 ,  C04B14/06 ,  C04B18/16

CPC分类号： C04B28/04 ,  C04B14/22 ,  C04B14/06 ,  C04B18/167 ,  C04B2111/21

摘要： Efflorescence resistance of concrete blocks is enhanced through the use of glass powder in the concrete composition. The glass powder permits a reduction in the cement content; the glass powder also creates a pozzolanic reaction to change the free calcium ions in calcium hydroxide to calcium silicate to fix the calcium ions inside concrete. The composition includes cementitious binding material of ordinary Portland cement, fly ash, calcium sulfoaluminate cement, ground-granulated blast-furnace slag in an amount from 20 to 25 wt. %. Coarse aggregate is provided from 10 to 15 wt. percent. Fine aggregate is from 32 to 39 wt. %. The composition further includes glass powder having a diameter of less than approximately 75 microns in an amount from 17 to 23 wt. %. Water is present in an amount from 6 to 9 wt. %. The dry density of formed paving blocks is 1800-2200 kg/m3.