Durability Archives

Effect of SCMs on Alkali-Silica Mitigation

January 25, 2019 TeamCivil Concrete, Durability

Effect of SCMs on Alkali-Silica-Reaction Mitigation 1- Fly Ash the three characteristics of fly ash that determine its efficiency in preventing ASR are fineness, mineralogy, and chemistry. In general, the finer the fly ash, the

Reasons of Concrete Spalling

January 25, 2019 TeamCivil Concrete, Durability

Concrete Spalling Currently, there are two mechanisms concerning the occurrence of spalling: 1- the pore pressure build up causes spalling in the cement matrix and 2- thermal and mechanical stresses. In 1997, Anderberg gave an account

Corrosion of Embedded Metals in Concrete

October 3, 2018 TeamCivil Concrete, Durability

Corrosion of Embedded Metals in Concrete Corrosion of reinforcing steel and other embedded metals is the leading cause of deterioration in concrete. When steel corrodes, the resulting rust occupies a greater volume than the steel.

Carbonation and Corrosion

July 20, 2017 TeamCivil Concrete, Durability

Carbonation is the term used to describe the effect of carbon dioxide on a material. The phenomenon rarely leads to structural problems but carbonation-induced corrosion can lead to unsightly spalling on structures. The repair costs,

Chloride Ingress into Concrete

July 6, 2017 TeamCivil Concrete, Durability

For concrete structures in chloride-containing environments, the ingress of chlorides can take place in different ways. Through uncracked concrete, the ingress mainly takes place by capillary absorption and diffusion. When a relatively dry concrete is

Alkali–Aggregate Reactions

June 15, 2017 TeamCivil Concrete, Durability

In this article, the three types of Alkali–Aggregate Reactions are described: (1) alkali–carbonate reaction (ACR), (2) alkali–silicate reaction, and (3) alkali–silica reaction (ASR). Alkali–Aggregate Reactions Water in the pores of hardened concrete contains quantities of dissolved ions

Concrete Distress Identification

June 13, 2017 TeamCivil Concrete, Durability, Repair

Distress Identification Before attempting any repair procedure it is necessary to have a planned approach to investigate the condition of concrete and reinforcement. While the diagnosis of damage or deterioration in some cases is reasonably

Visual Defects of Concrete

May 7, 2017 TeamCivil Concrete, Durability, Repair

Visual Defects of Concrete: one of the simplest ways to understand what exactly causes concrete to fail would be performing a Visual Survey of the deteriorated concrete structure. When a client hires an Engineer to inspect a