Yifu High-speed Railway of China Railway 19th Bureau

Background

This section, designated as Section 7 of China Railway Shanghai Engineering Bureau's Yichang-Fuzhou High-Speed Railway in Hubei Province, is located in Yichang City. The site concrete requires a slump retention time of approximately two hours. However, due to the low clay content in sand and gravel materials,it is very likely to cause the concrete to experience a concrete segregation phenomenon and subsequent bleeding issues.These problems ultimately result in decreased engineering quality and reduced construction efficiency.

Fig. 1 Post-pouring of concrete on site

Project challenge

Concrete post-pour bleeding presents a formidable technical challenge, stemming from complex and multifaceted factors that require precise coordination of materials, mix proportions, environmental conditions, and construction practices. This issue exhibits significant latency and latent characteristics – by the time water begins to seep out during late-stage hardening, interconnected pores and weakened interfaces have already formed within the concrete, causing irreversible damage to structural integrity and durability. Conventional quality control methods prove inadequate for effective prediction, while solutions often trigger domino effects that demand exceptional expertise to prevent new complications.

Solution from ARIT

Using ARIT latest development of a slump retention agent, the slump retention time can reach 3-4 hours, and the release is gentle, which can effectively suppress the problem of post-pouring water, and solve the problem of on-site maintenance time.

Product from ARIT

ART-M640

For detailed remixing formula, feel free to contact technicians of ARIT.