Controlled Low Strength Materials (CLSM) are cementitious self-compacting
materials, comprised of low cement content, supplementary cementing materials, fine
aggregates, and water. CLSM is typically used as an alternative to conventional
compacted granular backfill in applications, such as pavement bases, erosion control,
bridge abutments, retaining walls, bedding and backfilling of pipelines. This dissertation
presents the findings of an extensive study carried out to determine the corrosivity of
CLSM on ductile iron and galvanized steel pipelines. The study was performed in two
phases and evaluated more than 40 different CLSM mixture proportions for their
corrosivity. An extensive literature survey was performed on corrosion of metals in soils
and corrosion of reinforcement in concrete environments to determine possible
influential factors. These factors were used as explanatory variables with multiple levels
to identify the statistically significant factors. Empirical models were developed for
percent mass loss of metals embedded in CLSM and exposed to different environments.
The first and only service life models for ductile iron and galvanized steel pipes embedded in CLSM mixtures were developed. Models indicated that properly designed
CLSM mixtures can provide an equal or longer service life for completely embedded
ductile iron pipes. However, the service life of galvanized pipes embedded in CLSM
should not be expected to be more than the service life provided by corrosive soils.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/4840 |
| Date | 25 April 2007 |
| Creators | Halmen, Ceki |
| Contributors | Trejo, David |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 2809328 bytes, electronic, application/pdf, born digital |
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