Urban Renewal and Post-Disaster (war) Reconstruction

In 2015, the global production of steel exceeded 10 trillion RMB yuan, and the production of concrete surpassed 250 trillion RMB yuan, and these figures represent just one year's output. Steel materials and concrete products have been in use for over 100 years, and the existing market inventory is incredibly vast.

Rusting of steel products and aging of concrete are universal problems worldwide. Currently, there is no effective technology to address these issues in steel structures and concrete. Most old steel structures and concrete have to be scrapped and replaced. However, the high cost of scrapping and replacement makes this solution unfeasible. Many accidents occur with no other choice but to let them happen. The main problem with steel structures is corrosion; the primary issues with concrete include water leakage, cracking, carbonation, frost damage, honeycombing, strength, and so on.

Zhengsai Shield boasts over 10 years of consulting experience in international companies in Europe and America, and has specialized in concrete and steel repair for 20 years, accumulating tens of thousands of engineering practice cases both domestically and internationally. With nearly 40 invention patents and utility model patents, as well as publications in domestic and foreign journals, Zhengsai Shield is the lead or contributing editor of nearly 20 standards, and has creatively solved many engineering challenges.

Redundant and resilient waterproofing for exterior walls

Repair of detached exterior wall cladding

Repair of exterior wall leakage

Repair of exterior wall leakage

Water leakage in underground space

Water leakage on the top slab of the underground garage, spray with redundant and resilient waterproofing spray

Treatment of leakage in underground power distribution room

Leakage treatment and anti-condensation management for the basement of a villa using redundant and resilient sealing protection technology.

Treatment of leakage in high-speed railway tunnels

Reinforcement of Concrete Structure in Tunnel (The designed concrete strength is 50 MPa, but the tested strength is 30 MPa. After adopting redundant and resilient reinforcement technology, the strength reaches 50 MPa, meeting the design requirements.)

Treatment of water and natural gas leakage in underground garages

In a 10,000 square meter underground garage, water was seeping through the bedding layer. Redundant intelligent P30 concrete was poured onto the bedding layer, but the concrete was washed out to form a cavity of about 10mm. Surprisingly, after 12 hours, it was found that the original cavity that was leaking water had stopped seeping. -- Zhangjiakou Project

Treatment of Pavement Defects

After addressing the roof leakage using redundant and resilient sealing technology, the urban renewal project transformed the rooftop into a farm/aerial garden.

Ordinary rust-proof paint is not durable, prone to cracking, and has a short lifespan.

Zhengsai rust-proof paint features good toughness, strong adhesion, no cracking, and no peeling.

Treatment of Road Cracks

Treatment of Bridge Leakage

Treatment of exposed reinforcement in concrete

Mold prevention treatment for concrete

Treatment of reservoir diseases

Treatment of Concrete Corrosion by Seawater

Pipeline repair

Treatment of wall-penetrating pipe leakage

Repair of exposed reinforcement due to concrete corrosion in docks

Water leakage treatment for expansion joints in pipeline corridors

acking up, correction of deviation, displacement, additional storey construction, underpinning, reinforcement