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Dear All, I am a starting engineer and I wanted your views on the column layout. Basically, it is a one storied house and I wanted your advice for the layout of column. These are the few facts on the building, the external wall and partition wall are 200 mm and 100 mm brick masonry wall...

Well the setting time also affected by w/c ratio. Now a days, the initial setting time of cement can be greatly increased by introducing admixtures. I don't think 90 mins period grout should be rejected but that is another case if it is in your TS.Simple way to confirm is to test it at your...

It is always advantageous to have field experience whether one likes to be designer or not. Field experience gives you the opportunity to see the materialization from drawings and designs to a real solid structure. It also gives you better insight into the problems of practicality and makes you...

Usually we do this kind of operation prior to pouring concrete by embedding a pipe of the required diameter. KARMA

Since there is a trash rack at the inlet, the inlet should be designed to accomodate discharge considering some percentage of choking conditions. In hydropower we consider 50% of the net area choking condition. KARMA

I am a Civil engineer and have been involved recently in design of surface steel penstock for a project. Given the layout of the penstock it is obvious that anchor blocks and saddle blocks will be required. However, since I am new to this I have surfed through the internet to get some good books...

hahaha right. Maybe that is why it is called an Engineering process of coming to a conclusion.Yes i learned a lot here. THANK YOU ALL. KARMA

@Hoaokapohaku: The gradations specs are correct. Yes the designer has specifically mentioned that it should be a free draining fill. We are using a manual potable vibration machine and then excavator to compact the fill. The results were good the test showed an average of 95 % compaction...

1. @Ron I really like the idea of blending the cement. I will follow that up as an alternate proposal. So question is can I use OPC43 and what should be its blend(Cement:infill material).Are there any guidelines? 2. @BigH: a) You were right to assume that the bottom of the fill material is RCC...

1. I agree with @cvg but my hands are tied.I am just guessing that it was just to save some money. 2. @oldest thank you for your view. We are using geotextile drainage pipes for this purpose.Since the construction has already started. 3. @Ron I am also concerned about the consolidation by the...

this is the link to the drawing: http://files.engineering.com/getfile.aspx?folder=84cabd54-df2b-409e-8872-683042af42e4&file=ROUGH_SKETCH.png KARMA

Dear fellow Engineers Our designer has proposed a backfill on top on concrete and confined by concrete on 3 sides by concrete. The designer has proposed to use a Cohesion less/ free draining material for this purpose and relative density of 80%. The backfill will be carrying the weight of the...

Thank you @Hoaokapohaku you are a life saver. I had been meaning to ask you about the spreadsheet of some kind. I thought it would be breach of professionalism or copy right law or something like that. :) I am already feeling confident after reading the first few paragraphs.(No pun added) KARMA

We did try using VMA & industrial citric acid as per the manufacturers suggestion. We still had the same problem.Infact when I used VMA (TAM) the concrete kinda gave me light weight feeling(like putting my hand in a bubble bath mixed with clay). As for the FM we still had the same problem when...

@ Hoaokapohaku I would like to quote what you said earlier in this post "Our problems with surface voids is probably a fine aggregate gradation problem. This happens a lot with crushed sand. It is caused by over-packing the mix with more of a certain size aggregate than will fit in the overall...

Dear fellow engineers I have been having problems in my concrete for the couple of weeks in every grade of concrete. Generally we keep the FA:CA=50%:50% which is as you know fixed after the all in aggregate gradation. The fineness modulus varies from 2.7-3.5. We have a good mix at the batching...

I have a doubt in your strength conversion from core to cube strength. After applying the L/D ratio correction this value is converted to equivalent cube compressive strength either by dividing by 0.8 or multiplying it by 1.25. If i assume that your core strength of 5030, 4660 & 4450 psi is...

Thank You @jgailla for most informative advice so far. As a new member of this forum at least you made my day.:)

Yes you are right I am not competent enough. Hence the thread Help required. I desperately want to know about the space planning because it would make my life easier.:) no pun added.

Dear friends Thank you all for the advice. This didn't turn out as I was expecting. The only message I got was 1. Don't expand your knowledge 2. hire an Architect And on top of that I broke the code of conduct of this forum by using the word help.I didn't know that. Rest assured I will keep...