请帮忙翻译成英语（工程类）请不要用百度或谷歌的在线翻译,语法全是错误.

Adding steel fiber concrete block matrix the emergence and development of concrete cracks, compared with ordinary concrete, presents a better anti-cracking performance. GNA expansion agent with low dosage, low alkali content, and the advantages of good dispersion performance, mixed with proper amount of concrete GNA stable inflation rate, the late charge becomes smaller, the intensity is high performance significantly, fiber and expansion agent and adding can well meet the requirement of modern building crack, waterproof durability. Combining with engineering example, the high grade concrete mixing fiber and expansive agent in the preparation and application was summarized. 求采纳!