Concrete durability problems

Rainfed agriculture can be protected by adopting farm ponds. The harvested runoff water in a farm pond creates salinization / water logging problems so, it has to be lined to control the seepage losses. The article presents a review on the type of lining materials viable and to explore for a cost effective sealant which can be adapted. In comparison to clay lining, bentonite, LDPE and HDPE, HDPE in combination with concrete increases the durability along with the 100% seepage control with benefit cost ratio for HDPE lining in combination with concrete showed highest value of 10.4:1.

10p angicungduoc5 14-06-2020 14 0   Download

This study synthesizes the use of chemicals to prevent one of common concrete durability problems, alkali-silica reaction (ASR), and can help researchers (i) identify widely used potential chemicals and evaluate these chemical solutions to prevent ASR with proper understanding of mechanisms, and (ii) to identify the research gaps in order to develop guidelines and implementation plan on the use of these chemicals for future research.

8p tohitohi 19-05-2020 18 1   Download

Concrete members used for protecting seadike slope have to be suffered from a severe attack caused by both chemical composition of seawater and mechanical action of wave and current, leading to the decrease in durability and lifetime rapidly. In order to address this problem, this paper presents the method by using a combination of various types of admixtures to improve both corrosion and abrasion resistance for concrete, thus producing the product with higher durability and extending longer lifetime.

9p caygaolon 31-10-2019 12 0   Download