Recycled aggregate strengthening method based on microorganisms and nanometer materials

• Main Authors: ZHANG QI, RONG XUEWEN, WANG SHANJUN, SHANG BOMING, YAO KANG, WANG ZHEN, PENG XIN, JIN FENG
• Format: Patent
• Language: Chinese; English
• Published: 23.09.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to the technical field of building materials, and discloses a recycled aggregate strengthening method based on microorganisms and nano materials, which adopts a method of combining nano silicon dioxide sol treatment and nitroreductase denitrification induction of calcium carbonate precipitation, and can prepare granular recycled aggregate with excellent performance. Meanwhile, the method is not influenced by the water-cement ratio and composition of mortar attached to the recycled concrete, and can be used for preparing the recycled aggregate from the recycled concrete with various grades. The crushing value, the apparent density, the water absorption rate and the firmness of the recycled aggregate prepared by the method meet the I-class requirements of GB/T25177-2010 Recycled Coarse Aggregate for Concrete, the recycled concrete can be utilized to the maximum extent, resources are saved, and the environment is protected. 本发明涉及建筑材料技术领域，公开了一种基于微生物和纳米材料的再生骨料强化方法，采用纳米二氧化硅溶胶处理和硝基还原杆菌反硝化诱导碳酸钙沉