We already demolished the concrete and plan on replacing with a new concrete slab but I am not so sure how to deal with the original soil that expanded when a 2" underground emergency eyewash/shower line leak. What should I do with the original soil? Do I need to excavate and replace it with new...
Have this concrete that is already exposed to acid. You can tell that matrix holding the aggregates is partially gone and you can see the aggregate. I don't want to demo this concrete and I wanted to save it and overlay it with good sound concrete that is resistant to acid and base with PH...
We have this existing driveway that a has swale and would like to cover the swale with a built up ramp (hump) to re-direct surface water flow (see attached sketch). I have two questions that I am not so sure about. 1. In order to build the ramp, should I remove the existing asphalt top and...
I am concern about the distance between the fire hydrant and acid plant (source of the possible fire). This plant was built in 1960s and code is diferrent at that time. I have a project to put a containment wall around the acid tanks and as much as possible, do no want to relocate the fire...
Has anyone experience installing this carbone fiber made by Fortress Stabilization Systems? This carbon fiber is to help strengthen existing concrete. I have this bridge rehabilitation project that this carbon fiber maybe of good use to save the bridge from being replace.
Is there a standard to show where should I locate my parking lot wheelstops? I am looking for the distance between a wheelstop and the fence. These wheelstops will prevent hitting our perimeter fence.
We are planning to construct a concrete secondary containment with a sump to drain out either rainwater or other liquid mix. In order to drain the liquid inside the containment, an inlet pipe will be connected at the sump directly either to an existing drainline pipe or to an existing concrete...
I have this Bridge Load Rating Report that was prepared by another company. In the report were definitions that I need easier explaination to a layman terms. The reference is from Guide Manual For Condition Evaluation and Load and Resisance Factor Rating (LRFR.
The two rating levels that I...
We are still in the brainstorming stage on what we should use to contain spill of Fresh Acid and Spent Acid (sulfuric acid, conc. 91%). The existing primary containment is a steel tank and the existing secondary containment is a concrete curb or wall. We got cited for not enough secondary...
Can anyone tell me where to look for details of pipe bedding? I got this storm drain repair work using a combination of elestomeric couplings, clay wye fitting, and cpvc pipe. The depth from top of the pipe to ground surface is about 30". I am also interested in what type of soil should I use...
Our contractor that is designing a tank concrete foundation is asking these questions. Can you help me guide where and how to obtain their specific request (see below)? We don't have report and not planning to hire a geotechnical company at this point but maybe take sample to a soil laboratory...
Jobsite a 6" compacted layer soil material and found this layer has a density of 110pcf and 8" moisture content. Does the density and moisture content changes over time if you test the soil again say a month later (assuming that the 6" layer was not disturb but other outdoor elements are...
We had just demo the existing concrete slab which was damage due to upheaving from swelling of soil materials (clay type soil. What should I do with the existing soil before we place the new concrete slab? Should I take a sample and get a proctor on it and re-condition and re-use it? Should I...
We were demoing a concrete slab and when we remove the concrete cover, water was spraying in the air. We discover that a pressurize pipe was leaking under the slab for probably several years. This void was created due to the water leak. The volume of the void is about 5'x5'x3' deep. I am...
Does the concrete expand when sulfuric acid come in contact with the concrete? I have this secondary containment concrete trench with an acid proof lining. The lining was compromised over the years and now the sulfuric acid had worked its way to the bottom portion of the concrete trench wall on...
Present Situation:
12" DIA. carbon steel externally painted pipe use to bypass cooling water is partially corroded at the bottom area. The bottom area is resting (maybe partially buried) on top of a concrete slab which is the reason why it got corroded due to moisture. The pipe has a pressure...
We have an existing cesspool that we wanted to replace with other types of wastewater system. In order to identify what type of system we need, we need a groundwater elevation reading first. Is it appropriate to take groundwater elevation inside the existing cesspool? Could you explain...
I have this major concrete column that have spalling problem and in need of repair. Is there anyone know the guideline to follow for repairs? I know there are many products out there and technique. Can anyone share their experience and what works?
Thanks,
Nelson
Got this existing storage tank that need to be replace with a new tank. The existing tank is smaller than the new tank 60ft diameter vs 80ft diameter and new tank is 5 ft higher than the old tank. We would like to place the new tank in the same location as the old tank. My question is do I...
