美国南达科他州矿山技术学院的化工专家,正在别出心裁地研究利用细菌制造修补水泥制品的粘结剂,并已在实验室用此“细菌建筑工”粘结混凝土构件的裂缝,颇方便有效。研究表明,许多普通细菌在其代谢过程中均能分解尿素而产生二氧化碳与氨。氨与水反应生成氢氧化氨。氢氧化氨若遇到钙,便生成碳酸钙(石灰石)而析出。这就是“细菌建筑工”的原理。科学家将存在于普通土壤内的两种细菌:巴斯德细菌与脲孢子八迭球菌分别与砂子混合在 Chemical experts at the Institute of Mine Technology in South Dakota, USA, are using their ingenuity to study the use of bacteria to make binders for repairing cement products, and have used this “bacterial construction worker” in laboratories to bond cracks in concrete structures, making it convenient and effective. Studies have shown that many common bacteria can decompose urea and produce carbon dioxide and ammonia during their metabolism. Ammonia reacts with water to form ammonium hydroxide. If ammonia hydroxide is encountered, calcium carbonate (limestone) is formed and precipitated. This is the principle of “bacterial construction workers.” Scientists combine two types of bacteria found in common soils: pasteurized and urea spores mixed with sand