| 摘要 |
<p>The present invention relates to a composition for repairing a road paved with a concrete material. The composition includes: 15-21 wt% of ultra-rapidly hardening cement; 0.3-0.8 wt% of an expanding agent (preferably calcium sulfonate aluminate); 0.1-0.3 wt% of a fluidizing agent; 0.1-0.4 wt% of an AE agent; and 29-36 wt% of an aggregate; and 42-54 wt% of a coarse aggregate. When the composition is used for repairing a road, curing time is substantially reduced; workability is significantly increased; structural properties (compression strength, bending strength, and bond strength), durability (resistance to salt penetration, resistance to freezing and thawing, scaling resistance, and wear resistance), and appropriate attributes (dry shrinkage, a thermal expansion coefficient, elastic modulus) are enhanced. Moreover, generation of micro-cracks caused by retraction after curing can be substantially reduced. Therefore, rates of breakage and re-repair are significantly reduced.</p> |
