Curing-Free Cement Stabilized Macadam Technology (FCC, Free Curing Concrete) can achieve 90% of its strength within 2–4 days. Construction of the upper asphalt structural layer can be carried out directly after 3 days. It rapidly reaches the traffic opening strength required for conventional cement stabilized macadam in a closed environment, and its slow strength development at later stages prevents cracking.
1.FCC additive: It adopts ionic charge and polyether particles to adsorb on the surface of cement particles so as to achieve early strength and mass water reduction effects.
2、Curing-free cement stabilized macadam: It features no requirement for 7-day moisture curing, traffic opening within 24 hours, cost savings, lower traffic safety risks and crack prevention.
Figure 2 Curing-free Cement Stabilized Macadam
FCC additive: Dosage is 10% by mass of cement.
Curing-free cement stabilized macadam can be obtained by adding FCC additive into cement.
表格
| No. | Test Item | Unit | Technical Requirement |
|---|---|---|---|
| 1 | pH Value | / | 7–9 |
| 2 | Form | / | Powder |
| 3 | Total Alkali Content (Na₂O+0.658K₂O) | % | ＜0.5 |
| 4 | Specific Surface Area | ㎡/kg | ≥200 |
| 5 | Restrained Expansion Rate (7d in water) | % | ≥0.025 |
| 6 | Water Reduction Rate | % | ≥18 |
表格
| Specimen | 2d (MPa) | 4d (MPa) | 7d (MPa) |
|---|---|---|---|
| Reference Specimen | 5.2 | 5.42 | 5.966 |
| FCC Specimen | 6.08 | 8.05 | 8.37 |
