Hi BigH, thanks for your response to my question about the asphalt book. Sorry, I lost all my emails from the account that I used to communicate with you the last time... could you please send me your email address please?
Hi ! Can anyone recommend me a good reference book for asphalt materials (design and construction)? I need to do some literature research to answer some questions for an AC pavement that has some surface defects. Thank you !
Hi, what could be the best tests to verify the quality of the asphalt? New asphalt was placed 5 months ago but not open to real traffic yet. Client is concerned about tire marks are left on the asphalt. These marks are from steering the wheels without movement. Asphalt is PG 60/80 with...
Hi, can anyone recommend a good software for preparing boring logs? We have been using AutoCad but some people are not familiar with it so trying to find a software... Thanks!
We are designing a foundation for a water tank. The foundation is a circular continuous shallow foundation on weathered limestone rock. Soils are very competent. The foundation shape is like a rectangular pedestal (it is NOT the typical inverted T-shape shallow foundation shape). We are...
Hi all, our client wants to build a small house adjacent to an existing CMU wall which is old and showing some cracking. However, excessive deflection or settlement was not observed. See attached photos so you have an idea of the wall/site conditions. I expect that this wall is retaining clayey...
I am involved in the construction of a new concrete hardstand (200 mm thick [8"]). The dowels are 20 mm diameter x 400 mm long, spaced @ 300 mm on center. The center of the dowel is at 110 mm below the surface of the concrete surface. Project requirements indicate that the dowels shall be...
Have you ever used lightweight EPS fill as flexible/rigid pavement subgrade? If yes, what CBR/k can be used? Perhaps, the EPS compressive strength can be correlated with CBR/k? Traffic is composed of medium size forklifts (10-15 kip axle forklift, max 50 operations/day in 25 yrs design life)...
Hi ! In the US, what is the thickness of the subgrade? Here in Japan, we consider subgrade soils to extent 1 meter below the subbase course... just curious about what are the considerations for subgrade thickness in the US...
For example, if design guidelines indicate that the subgrade should...
We are experiencing some failures in our pavements that were coated with solar reflective coatings (Street Bond) (https://squareonepaving.com/products/street-bond-150-coating/overview/). See also attached photo. Basically, when we turn the wheels on the spot, the coating is peeling off. This...
I have a new project which I have to deal with expansive soils... do you know any design approaches for pavement design in subgrades with expansive clays? I am looking for methods to determine the thickness of expansive clays to be removed in order to provide adequate support for this new...
Hi, I had a boring log which shows "RX" in the USCS column. Obviously RX is not an ID for soil classification so I assume that it indicates "Bedrock". Is this assumption correct? Thanks !
Quick question: in the US, what is the typical procedure to obtain the relative density? Are any limitations for the fine contents for the sand samples?
Just looking for input from the SEs here: if I have a building which the structural system is composed of exterior shear walls with columns and interior columns, do the exterior shear walls require their own foundations (i.e wall footings) or can they be supported on grade beams which will...
I just looked at the Geostrata magazine from the GeoInstitute of ASCE and found this article... When I contacted John some time ago to get his input for an underpinning project, he was very helpful and responsive. I know he is a busy guy but, he took the time to look at the problem and provided...
Does anyone know references for DCP vs. Compaction degree correlations?
Also, I am looking for unconfined compression strengths from pocket penetrometer readings vs. elastic modulus correlations.
Any reference will be greatly appreciated !
Hi, I move this thread to the structural forum (it was in the demolition forum) since I think that people looks more at this forum....
We are doing a preliminary study for addition an opening in a wall for an existing tank. The existing wall is very thick (2 m thick) concrete wall. The tank is...
We are designing a project where the concept design shows a concrete slab on top of a liner. This is for a secondary containment for an above-ground fuel tank. However, there is a slope (between 3:1 and 2:1) in one of the sides of the containment where concrete on top of the liner is also...
Hi !... I do geotech so, sorry if this is a dumb question: what are the implications in the structural design if we change the class from D to E or F? Say, we have a mid size building (5 story) so the period may be about 0.5 seconds. My understanding is that for LOW periods, there is a trend...
I have a slab on grade, 6 and 8 inches thick. No vehicle loading, just well distributed load (liquid). Saw cut is 40 mm depth and wire mesh is 50 mm below the surface of the slab. Do I needs to cut the wire mesh under the saw cut joints or can the wire mesh be continuous thru the slab...
