Questions tagged [concrete]

For questions about the material concrete, or its application in an engineering context. Concrete is a composite material composed mainly of water, aggregate, and cement.

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Is there a substance i could treat concrete with to make it not scratched by steel?

Is there a substance i could use that would harden the surface of concrete enough to make it resist scratching by steel?
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How could these 2 concrete pours affect algae build up?

Here's the image: https://ibb.co/12kJCg8 First off, I live in a third world country with little standards for home building. My family's driveway ended up like this as the laborers somehow didn't ...
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Building Engineering - Lightning Conductor [duplicate]

I went on a new building, for installing many "details" before people relocating inside. On the roof, I saw a very intriguing things about lightning conductor : they are inside walls, packed ...
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Modeling of a strap beam/foundation tie beam

The purpose of a strap beam (or tie beam - i'm not sure of the exact expression on english) as far as I know, is to enable foundation (horizontal) stifness. So my question is: how to model them ...
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Live and dead loads on lift core (passenger and cargo)

According to Eurocode or even better - JUS standards (if there is someone from EX-JU countries here), what are the dead and live load values and schemes for reinforced concrete lift core for both ...
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where did the concrete splitting test calculated stress formulat come from?

In compression test of cylindrical concrete sample we get the normal stress easily by dividing failure force by sample cross section, but how we can explain the formulat used to determine tensile ...
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Modern equivalent concrete strength to 'Class Ws 3/4" '

Consider the following extract from a UK reinforced concrete detail drawing dated 1970: What is the modern equivalent to this concrete class?
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Is there a standard formula available to calculate lateral concrete pressure from the measurements of lateral concrete strain?

As shown in the image, I have done a vibrating wire type strain gauge and pressure cell (not shown in the image) instrumentation on full scale form. the objective is to measure the lateral pressure of ...
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Why do lvdt sensors give us different results?

We take a cylindrical concrete sample and apply compression load on it, perpendicular to its head. To measure its strain we use 2 Lvdt(strain measurement devices)on both sides of the concrete sample . ...
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can ceramic be used as a building material?

From what I read, concrete has much lower compressive strength than ceramics. So why aren't we using ceramics to build? Is it because ceramic failure is difficult to predict? Because it's hard to ...
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International Building Code vs Industry Standards

Which is more reliable. For example, in setting steel posts in the ground, the pole should go under ground 1/3 of its height from the surface up. In IBC, steel post depth is made rather on a storey ...
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Question on plastic limit theorems and reinforced concrete

The lower plastic limit theorem is stated in Wikipedia as follows: If an equilibrium distribution of stress can be found which balances the applied load and nowhere violates the yield criterion, the ...
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How to choose the dimensions for a prestressed I-beam?

I need to design a simply supported symmetric I-beam (for a school problem). However, I can't find much information about the selection of the section or if there exist any standards for that. the ...
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How to construct a very large circular wall made of concrete? [closed]

Here's the situation: a thin concrete wall needs to go up, but it's a very large diameter, say 1 km. The wall thickness is on the order of 20 cm. The wall only needs to be maybe 3 meters high. I'm ...
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