Does using a vapor vapor under concrete slab negate the AASHTO/ASTM requirements to evaluate aggregates for alkalai-silica reactivity? I am considering a situation in which the ground is or could be occasionally moist, not a location with obvious surface water or occasional ponding, ect.. Just...
Is anyone aware of any standard procedurers or practices that may be available or comonly used for adjusting payment for out of specification aggregates?
We are currently wrapping up a DOT/FAA project in which we had several QA samples of aggregate Subbase and Surface Course with out of spec...
I am interested in others experiences, thoughts, knowledge, ect. concerning concrete aggregates, specifically crushed vs. non-crushed. When I lived in midwest US it was comon to use crushed products in concrete. I am now in Alaska where it is much more common to use alluvial aggregates for...
I am researching polystyrene aggregate for use as substitute for drain rock behind a retaining wall.
Have you used this material? Where did you purchase? Cost? Any tips or thoughts on using polystyrene aggregate as drain rock substitute would be appreciated.
Thanks
Anyone know why this spec does not allow angular rock for on-site wastewater sewer drain rock?
Thanks
https://files.engineering.com/getfile.aspx?folder=6df8777d-65e7-4f25-9545-8e5fb9f25956&file=Sewer_Rock.docx
Any sugesstions for gradation of retaining wall drain rock backfill? See attached sketch. I am not sure about the retaining wall design assumptions, this design is by others. I am assuming the wall was designed as being in a drained condition. We are a potential aggregate supplier, have been...
Anyone have experience with ASTM C142 Clay Lumps & Friable Particles test on fine aggregates?
The procedure requires aggregate particles of size passing #4 and retained on #16 to be individually "squeezed and rolled between thumb and forefinger to attempt to break the particle into smaller...
Does anyone know if a well compacted dense graded asphalt concrete floor meets code for a hangar? We are working on a hovercraft hangar and the fire Marshall is questioning our plan to pave the hangar floor due to absorption and combustion issues.
Thanks
Is anyone familiar with aggregate degradation or durability testing? If so are you familiar with the CL-305A shaker? I am trying to find information on what modifications are required to make the shaker meet the requirements of AASHTO T210 or for the Washington Degradation Test.
Thanks
Friend of mine is building a house with a reinforced concrete slab for the roof that will also double as a driveway. Curious as to recommendations for steel reinforcement in the slab. It will be spanning multiple beams in one direction and a center support in the other. He has purchased...
I am searching for the names of insurance companies that provide professional liability, and errors and omissions coverage to small firms. I am a civil engineer in Alaska with a small practice providing general civil engineering consulting services including materials testing, drainage...
A client brought in a sketch of his planned "deer hunting shoot house".
See attached
The concrete footings are in and he plans to use telephone poles for the legs. I recommended shimming the legs up off the concrete to prevent rot due to moisture. I am curious if anyone has any creative ideas...
I am interested in resources used for estimating the "7 day average high pavement temperature" and "low pavement temperature" when selecting performance graded asphalt binders. Any information concerning weather websites or converting air temperatures to pavement temperatures could be very...
We have a road paving project specifying PG 52-40 asphalt binder. I have never worked with this grade of asphalt, we typically use PG 52-28. I am interested in information from anyone who has experience with PG 52-40 We are specifically interested in information concerning workability and the...
Hello, Please see the attached picture.
I am interested in information related to connecting a 1/4" to 3/8" thick x 12" wide x 13' long steel plate to the 2" x 10" edge board and 2" x 4" top plates shown in this photo for the purpose of removing the load bearing wall. I understand there are...
I have a friend that would like to remove the wall in the attached picture and provide a 12 ft wide opening. The wall is supporting approximately 92 sq. ft. of sloped roof covered with clay tile and 60 sq. ft. of flat roof with membrane. For the factored vertical loading I have calculated the...
I am looking into building a temporary bypass road with the maximum fill height of approximately 40 feet. we are limited in our width of right-of-way and are considering constructing a wire meshed faced geotextile retaining wall. I am curious as to others experience with such walls. Some...
We are looking at installing a deep(50') 10' diameter cmp fish pass culvert. Considering installing in 2 stages so we can keep 2 lanes of traffic and a bike path open. I am looking for ideas on how to temporarily shore up the excavation longitudinally along the centerline of the highway. I am...
I am planning for a part-time sole proprietorship that provides construction materials testing, geotechnical, and general civil design services. Nuclear densometer included. I would greatly appreciate input from those experienced in this arena.
Names of insurance companies and contact...
Hi,
I am researching surveying software. I am looking for the least expensive way to download points from a total station to my computer and perform basic tasks such as cogo and terrain modeling.
The total station is a Topcon GTS-303 and I plan to use HP 48GX for collecting data. I also...
