Doctor of Concrete—Self-healing - The Issues and Discussion of Modern Concrete Science - page 157

Fig. 12.14 Process of repairing and condition after curing
Additionally, we dealt with crack of a crossbeam according to self-healing
principle at construction site. Under premise of employing no chemical material, the
crack got union afresh, which make the crossbeam can be serviced safely and
trustingly. As the patent technique was invented by the above engineers collectively,
it is inconvenient to divulge excessive details herein.