Instead, up to 30% of its weight could be slag—the toxic gunk left over when steel is made.

反而，高达30%重量可以，这在制钢过程中产生有毒废料。

A dam broke on Friday causing mud and mining debris to flood into the city and in other parts of the region.

上周五，座大坝决堤，导致泥浆和涌入城市和地区其他地方。

The workers wore sleazy working clothes to carry slag and slate.

工人们穿着质地薄工作服工找和板岩。

The results: concrete slugs made with ingredients like fly ash and slag held up remarkably well after more than a month.

成分为粉煤灰和混凝土塞在个多月以后依旧保持完好。

Now, the part of ejected scoriae and ashes seemed to my mind a very rough one to act.

现在，喷射出和灰烬部分在我看来个非常粗糙表演。

The solution? Novel blends of concrete that use cheap leftover materials from the coal and steel industries: fly ash, silica fume and slag.

有解决方法吗？使用粉煤灰、硅粉和等来自钢铁工业廉价剩余材料制造新混凝土。