This is reinforced cement that is stronger than what Gaza has been getting, and it is what UN agencies in Gaza require for their structures.
An average of two ships a week are expected to be coming from Turkey with similar amounts. The ships are offloaded in Ashdod and then would travel to Gaza by truck.
Which means that Israel and Turkey are cooperating in helping Gazans build. One of those stories that you won't see mentioned anywhere.
The article also claimed that the amount of cement needed to repair damaged buildings in Gaza is more than Israeli firms can provide on their own.
A few days ago there were reports that Israel had halted shipments of cement to Gaza after discovering issues with the distribution system, apparently discovering that thousands of people who applied to receive cement were buying more than they were supposed to, with their names being input multiple times into the systems that keep track of it. It sounds like that issue has been solved. (COGAT did not respond to my request for a comment.)