Read closely:
1 Cor. 3:10-15
"According to the grace of God given to me, like a wise master builder I laid a foundation, and another is building upon it. But each one must be careful how he builds upon it, for no one can lay a foundation other than the one that is there, namely, Jesus Christ. If anyone builds on this foundation with gold, silver, precious stones, wood, hay, or straw, the work of each will come to light, for the Day (judgment) will disclose it. It will be revealed with fire, and the fire itself will test the quality of each one’s work. If the work stands that someone built upon the foundation, that person will receive a wage. But if someone’s work is burned up, THAT ONE WILL SUFFER LOSS; the person WILL be saved, but only as through fire."
The person will SUFFER LOSS - as through fire.
This passage is NOT talking about Heaven because there is suffering.
Heaven is a place where there is NO suffering - ZERO.
There cannot be suffering in Heaven because it is completely devoid of imperfection and impurity (Rev. 21:27).
This place cannot be Hell because the person is SAVED.
This is talking about another state of being - that of final purification.