Is Air-Entraining Agent a Panacea for Solving Frost Resistance Problem? - The Issues and Discussion of Modern Concrete Science - page 55

Table 5.1 Relationship between freezing - thawing cycle and various performance indexes of concrete
Number Construction area Mix proportion/kg Cement/

stone/sand/water

Apparent
density/kg

Sand
ratio/%

Vebe con-
sistency/s

Air con-
tent/%

Freezing thawing

-

cycle

1 Urumchi 1 320:1387:652:141 2500 32 18 2.4 225

2 335:1320:660:145 2460 33 14 3.5 250

3 380:1320:660:150 2422 33 9 More

than 4

More than 350

2 Hohhot 1 320:1430:675:137 2562 32 20 1.8 200

2 340:1280:680:140 2440 35 12 4.0 250

3 350:1210:700:141 2401 37 8 More

than 4

More than 350

3 Yushu in Qinghaiai

province

1 320:1382:648:144 2494 32 20 2.2 225

2 335:1332:650:145 2462 33 11 More

than 4

325

3 350:1250:700:145 2445 36 9 More

than 4

More than 350

4 Harbin 1 320:1410:653:144 2527 32 25 2.1 200

2 330:1350:660:145 2485 33 15 3.5 285

3 350:1165:626:161 2302 35 Below 5 More

than 4

More than 350

5 Hailar 1 320:1415:650:141 2526 31 22 2.2 225

2 335:1335:655:141 2466 33 11 3.5 325

3 350:1280:670:138 2438 34 Below 5 More

than 4

More than 350