This article is devoted to the use in concrete of polymeric reagent POLY-ANS, developed based on production waste polyacrylonitrile fibers. The results effect capillary absorption concrete, which contributes provision high resistance cement saline environments, are given.

Polymeric nano-materials utilization in reinforced concrete, aiming to deal with steel corrosion was developed in previous works. Promising results were obtained with PEO–b–PS nano-formations, both in terms of enhanced bulk matrix properties and improved steel corrosion resistance. Recent research has been focusing on a cheaper and commercially available polymer, Pluronic P123. Pluronic is able...

Elevated rail transit has been developed in some big cities in China in recent years. However, specialized codes for design of the bridges in the elevated rail transit system have not yet been established. Based on the prestressed concrete (PC) box girder bridges on Guangzhou metro line 4, some technical features of design principle and technology requisition, ensemble plan and design load of b...

Determination the optimal mix design plays an important role in order to gain the maximum characteristic strength. This research was conducted as a case study for Manjil tunnel project located in Qazvin-Rasht highway. For this purpose, 18 concrete mix designs were prepared at the study phase of the project with specifications such as conventional water-to-cement ratios of 0.4, 0.5 and 0.6, the ...

This work presents a study on the effects of luffa fibers and gamma radiation as tools for mechanical improvement of polymer concrete based on a polyester resin/foundry sand mixture. Different concentrations of irradiated and non-irradiated fibers (0.3, 0.6 and 0.9 wt%) and higher irradiation doses were used. The results show that the compressive strength and flexural strength values decrease g...