ASR Testing - Vlog

Join Jon in the Intelligent Concrete testing lab to discuss colloidal silica in a grout mixture.
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We are here to answer YOUR questions!
Comment below any questions you have..

[@ahmadk1195]

Hey I was wondering if you could tell me what the container is made of?

[@Piyushlunkad]

Did you perform ASR test on mortar mix consists of cement + coarse aggregate (crushed/fine) + sand + water as a mortar mix together or tested reactivity of specimens with only cement and coarse aggregate (crushed/fine) with water ? What does ASTM specify? I am wondering if ASR test should be conducted on sand/fine aggregates as well or only coarse aggregates.

[@Offecon]

Please, can I get a link to buy the container for my lab test?

[@IntelligentConcrete]

Unfortunately, we don't sell products. Check out www.specificationproducts.com for more assistance with products.

[@gayathrysatheesan7128]

Can you please tell me how to check or calculate ASR reaction of glass powder concrete for my final year project

[@IntelligentConcrete]

There is a new DRAFT ASTM that just came out on recycled glass in concrete. That might be a good resource for your question. www.astm.org/DATABASE.CART/WORKITEMS/WK55249.htm

[@gayathrysatheesan7128]

@@IntelligentConcrete Thanks a lot

[@himmyneutron09]

how do i calculate for the expansion % in the asr test

[@IntelligentConcrete]

Ace Cube sorry the delay. The following is taken from a UC Davis paper, “ASTM C 1260 is a standardized test used by cement chemists, concrete technologists, and industry to determine the susceptibility of an aggregate to the alkali-silica reaction (3). The aggregates that are used in this test are crushed down to sand-size, and graded to the specification listed in the test. An aggregate/cement ratio of 2.25 is used with a water/cement ratio of between 0.45 and 0.47 (Ratios are by mass.). Enough mortar is mixed to make three mortar bars with the dimensions of 25 × 25 × 285 mm. The mortar bars are then cured for 24 hours in a fog room at 23 ± 1.7 C, demolded, and immersed in water within a closed container. The container is placed in a water bath maintained at 80 C. After 24 hours, the length of the specimens are measured, and then placed back into the container with 1M of sodium hydroxide solution maintained at 80 C. The volume of the hydroxide solution is between 3.5 to 4.5 times the volumes of the mortar bars. The specimens are removed briefly from the containers periodically and measured before significant cooling occurs. The average expansion of the three mortar bars, after 14 days of immersion in the hydroxide solution, is used to estimate the reactivity of the aggregate. 0.0 to 0.1 percent expansion means that the specific aggregate tested is not reactive, 0.1 to 0.2 percent is considered to be inconclusive and require further testing, and greater than 0.2 percent is considered to be reactive.” www.ucprc.ucdavis.edu/PDF/Accelerated%20ASR2.pdf