How do engineer determine the number of cells for concrete box girder bridges?

How do engineer determine the number of cells for concrete box girder bridges?

08 September 2018 9,780 2 View

In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?

In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?

08 September 2018 3,952 8 View

If on-site slump test fails, should engineers allow the contractor to continue the concreting works?

If on-site slump test fails, should engineers allow the contractor to continue the concreting works?

08 September 2018 7,060 8 View

Are diaphragms necessary in the design of concrete box girder bridges?

Are diaphragms necessary in the design of concrete box girder bridges?

07 August 2018 9,089 5 View

What are the problems associated with this method in terms of shrinkage of concrete?

In bridge widening projects, the method of stitching is normally employed for connecting existing deck to the new deck.

06 July 2018 2,198 4 View

In the design of elastomeric bearings, why are steel plates inserted inside the bearings?

In the design of elastomeric bearings, why are steel plates inserted inside the bearings?

06 July 2018 5,505 6 View

Pick up the correct statement regarding low heat cement from the following?

A.It possesses less compressive strength B.Its initial setting time is about one hour C.Its final setting time is about 10 hours D.Its mainly used for mass concrete work E.All the above.

06 July 2018 2,641 2 View

Does Water damage concrete?

Does Water damage concrete?

06 July 2018 1,183 4 View

What is the cement sand & aggregate ratios for various grades of concrete mix?

What is the cement sand & aggregate ratios for various grades of concrete mix?

06 July 2018 8,515 1 View

A badly mixed cement concrete results in?

A.segregation B.bleeding C.honey combing D.none to these.

06 July 2018 6,739 2 View

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 3 View

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03 March 2021 5,360 2 View

How can we raise the figure when we writing a paper with Latex ?

Hi, everyone. I'm a starter to write a paper by Latex. But I have some difficulty using it. I'm writing the paper with 2 columns. And, there is one figure that occupies the 2 both-sides. I want to...

26 February 2021 3,738 3 View

What is the best way to calculate the angles of twist for concrete columns subjected to torsional moment using finite element software?

In Finite element software like ANSYS , there is difficulty in obtaining direct results of twisting of concrete members because SOLID65 which is the unique element designed to represent concrete...

26 February 2021 3,806 2 View

Compute for the total volume of concrete needed for the concrete pouring of the foundation including its column up to NGL only as shown in the plan?

Looking for the quantity of cement, sand, and gravel of footings and columns. Thank you!

25 February 2021 3,092 2 View

No amplification data for qPCR on MxPro?

I have set up a qPCR run on MxPro with SYBR green and ROX as a reference, however, when I go to the analysis section the program seems to only collect data for the dissociation curves and not the...

25 February 2021 8,039 1 View

Can I use TCA instead of TFA for protein analyis in RP-HPLC?

I am trying to analyze lipase using the reverse phase-HPLC C18 column. In the literature, 0.1 % TFA was and 60% ACN was used. Can I use TCA in place of TFA? If any other methods are available to...

25 February 2021 2,388 3 View

Can I use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography?

Hi! I would want to know if I can use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography. This column has a polyethylene glycol phase, but I can't find the manual to check...

22 February 2021 730 2 View

My silica gel column dried can I somehoe save the trapped matter?

I tried to separate my substance from a protein in a sillica gel column. By mistake, it dried and cracked. Can I save the trapped substance? Can I repack it ,or at least elute all of the trapped...

22 February 2021 1,789 3 View

Physical-chemical formation of stalactites/stalagmites. what promotes the formation/growth of these structures?

I know, or think I do, the basic idea behind these natural structures, as from what I know they form due to water dripping from the top leaving a salt deposit behind. But started to wonder about...

22 February 2021 1,400 4 View