Concrete is the most commonly used and economical building structural material in petrochemical equipment.Howev-er,more safety problems are being faced along with the increasing service life.High quality protective layer is an important meas-ure to improve durability of reinforced concrete.Based on key technology of hyperbranched polymer,concrete anti-carbonization material was prepared,and a set of system scheme and supporting construction technology of"nano rust-to-rust primer/reactive penetration sealing primer+anti-carbonization middle filling layer+anti-carbonization weathering resistance topcoat"was de-signed.The experimental results on outer wall of sedimentation tanks in petrochemical enterprise showed that the surface of con-crete repair layer is flat with no obvious defects,dry film thickness is capable of achieving design requirement,compressive strength of repair layer≥35 MPa,adhesion ≥ 1.5 MPa,no carbonization phenomenon occurs.In addition,nano-lithium sili-cate hybrid polymer anti-carbonization system is water-based system that reduces VOC emissions,brings significant environmental protection effects and achieves good social benefits.
维普
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