Pore solution study has been carried out on 2.43 and 14% C3A hardened cement pastes. Data have been analyzed in conjunction with the data developed in two pore solution studies made by Page and Vennesland and Diamond using 7.37 and 9.1% C3A mature cement pastes. The results show that C3A and alkali
Effect of tricalcium aluminate content of cement on corrosion of reinforcing steel in concrete
β Scribed by Rasheeduzzafar; S.S. Al-Saadoun; A.S. Al-Gahtani; F.H. Dakhil
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 774 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0008-8846
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β¦ Synopsis
Results of accelerated laboratory studies reported in this paper show that a high tricalcium aluminate content of cement has a significant beneficial effect on reinforcement corrosion resistance performance of concrete structures. On an average, a 9.5% Type I cement performs 1.62 times better than a 2.8% C3A Type V cement in terms of corrosion initiation time for embedded reinforcement. This appears to be due to the complexing ability of C3A with free chlorides in cement.
π SIMILAR VOLUMES
Chloride binding and its influence on the rate of reinforcement corrosion has been investigated in a range of mixes by, respectively, pore solution analysis and measuring the galvanic current in macro corrosion cells formed by embedding mild steel bars in two layers of concrete. For chloride derived
## Abstract Chromate, which is known to be an effective corrosion inhibitor in various applications, is contained in cement as a trace element. So far its influence on the corrosion of steel in contact with concrete has not been investigated. However, as the introduction of chromateβreduced cements
The influence of heterogeneity of cementitious matrices, e.g. uneven porosity distribution in repair cement paste or mortar, on surface corrosion of the reinforcing steel was investigated using a low frequency impedance technique. Rebar embedded in lower porosity matrices had lower surface impedance