siliceous or carbonate
siliceous or carbonate
(OP)
if i don't specify the type of aggregate what will i get? is it dependent on the region? is one more expensive than the other? not sure i have ever seen a mix design that indicates it.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: siliceous or carbonate
If ASTM C-33 is used, sometimes local aggregates may not qualify under the grading requirements. However, within C-33 there are exceptions to the grading requirements such that an aggregate may be considered C-33 compliant even if it does not strictly comply with the C-33 requirements, but does have a satisfactory service record and is in compliance with the grading specifications of local public works specifying agencies.
Mix designs may not (usually don't) indicate the type of stone unless the type is specified, but do indicate test values that demonstrate compliance with the performance criteria specified.
RE: siliceous or carbonate
1. Aggregate source
2. Statement of test results for no reactivity
3. Fineness modulus and statement of satisfactory historical performance if fineness modulus does not meet C33 requirements
4. Statement of satisfactory historical performance of the specific mix design
5. Gradations
6. Sources of all materials
7. Strength history including moving average
8. Strength gain curve for the mix design
Type of aggregate is dependent upon the area of production. Local or nearby aggregates will be first priority. Imported aggregates will be more expensive.
RE: siliceous or carbonate
RE: siliceous or carbonate
RE: siliceous or carbonate
One of the things we are trying to do with ACI 301 is to get changes allowing performance design (and to remove things like slump specification and limitations - but still allow the test for batch-to-batch consistency purposes.) We would like designers to be able to list performance criteria rather than recipes and limits which may or may not work for the application.
RE: siliceous or carbonate
I thought the same thing, but had read the first word as "salacious".
RE: siliceous or carbonate
RE: siliceous or carbonate
Hey hokie...aren't all engineering topics "salacious"?