Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks (2007) / Chapter Skim
Currently Skimming:
Pages 28-36
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 28... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks INTERPRETATION, APPRAISAL AND APPLICATIONS SEDOC Computational Tool Statistical Experimental Design for Optimizing Concrete (SEDOC) is a pair of Microsoft® Excel workbooks and auxiliary "help files" that have been created to support the completion of Steps 1 through 6 in the Methodology as laid out in NCHRP Report 566.
|
From page 29... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks Overview of SEDOC: Analysis Worksheets SEDOC: Analysis includes the following functional worksheets: • Experimental Design Worksheet - The mixtures for testing are selected based on the factors and levels input by the user. • Compound Factor Settings Worksheet - If the user chooses to employ Compound Factors, such as the linked SCM Type and Amount Factors used in the hypothetical test matrix, the details are specified on this sheet.
|
From page 30... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks type. This is because SCMs are largely by-products of other industries, and their quality and consistency are typically secondary concerns to their producers.
|
From page 31... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks concept could be used to compare any mixtures subjected to the same testing program, i.e., any mixture that has an overall desirability calculated for the same list of responses. This may be used to compare concrete mixtures in use currently or in the future to those generated by this program.
|
From page 32... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks consequences of choosing either the option of making a simple substitution or of re-optimizing the mixture can be quantified using the model predictions. The need for Confirmation Testing, which typically would be recommended if re-optimization is performed, could also be judged based on the differences in the overall desirability between the existing BC and the newly predicted BPC.
|
From page 33... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks Implementation of Concrete Mixtures Designed for Durability The recommended general process for the implementation of a concrete mixture where durability is a main objective for a given structure is summarized as follows: (1) targeted performance must be identified, in terms of general objectives and in terms of quantifiable measures; (2)
|
From page 34... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks Therefore, including field-batched concrete testing as part of the confirmation testing step of this Methodology may save time and expense on project-specific studies. The Methodology can also be useful to a concrete supplier that might use it to develop standard commercial concrete mixtures.
|
From page 35... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks providing a motivation for the use of concretes that perform above and beyond minimum requirements. Some referee quality assurance testing would be needed if data are accepted from independent testing laboratories to ensure that the independent test results are consistent with the results from the mixture development work.
|
From page 36... ...
NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks contractor to set the pace of production and testing, while allowing state labs to check the accuracy of the concrete testing. Whenever a new concrete mixture is being evaluated, it may also be very beneficial to cast specimens from concrete sampled during construction for longterm durability testing to confirm that the project objectives are being met and to provide further confidence for using the concrete mixture in the future.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.