IF THIS IS YOUR COUNTERTOP AND YOU CAN LIVE WITH IT THEN KEEP IT...JUST RESEAL OVER THE CRACKS. if THIS IS A CUSTOMERS JOB THEN I WOULD SAY YOU MAKE A NEW ONE.....SORRY TO TELL YOU THAT. JUST THINK OF IT AS A LEARNING EXPERIENCE. I KNOW IT SUX BUT THIS BEING YOUR FIRST ONE, YOU DONT WANT TO START WITH A BAD REPUTATION. NOW YOU KNOW TO PUT SCRIM IN THERE...OR REBAR...I PREFER SCRIM(NETTING). I CAN'T TELL YOU HOW MANY PIECES I HAVE HAD TO MAKE AGAIN IN THE BEGINNING OF MY CAREER. EVEN NOW EVERY ONCE IN A WHILE I HAVE TO MAKE PIECES AGAIN. ITS ALL ABOUT LEARNING AND TRIAL AND ERROR AND MAKING A GOOD REPUTATION FOR YOURSELF. GOOD LUCK
My vote would be to tear it out and re-pour. If you don't, more cracks will continue to show up over time. Concrete needs primary reinforcement.
Don't fret...I poured my first countertop three times until I felt I got it right.
Let's begin with the process of explaining the steps to repairing your countertops. Firstly, it is important to understand whether the crack you are observing is an actual crack or a fissure, for chips you can skip to the repair section of this post. This information is relevant when determining which type of materials are required to get the job done right.