Recent content by emanc

We are in south east asia. Contractor intends to use somewhat like a roller skateboard where worker can slide himself inside the pipe. We already rejected this methodlogy due to safety issues, we are looking at automated method, bimr, have you done any automated lining method before? the lining...

The project is extension of municipal water supply system, water willbe drawn from a lower level reservoire then pumped to a resrvoire about 130meter at higher level through the transmission line. Water supply will then be distributed by gravity.

The project involves installation of about 5 km steel pipe transmission line and about 7 km HDPE main distribution line. Contractor proposed full penetration butt weld joints for steel pipes. We have another issue on lining of weld joints inside pipe as the contr proposed manual application of...

Thanks guys for your usefull inputs, BigInch thanks for the pictures.

Is it proper method to lay steel pipes (500mm dia. x 9m long) by pre-fitting up every 2 pipes at ground level then lift and place into pipe trench then full weld. What are advantages and disdavantages. Any opinion would be very much appreciated. Is laying 1 pipe at a time better than 2 pipes.?

I am reviewing a proposed concrete design mix, 'would like to inquire if there is any mention of minimum water cement ratio of 0.40 in ACI code, and what is the difference between w/c ratio per ACI and the adjusted w/c ratio in the design mix? 'appreciate any clarification on this.

We are currently studying strengthening of reinforced concrete tanks in a filtration plant and we are looking for food-grade fiber reinforcement material. Any info on where we can source out this material will be appreciated.

I am looking for standard detail of installing stone or marble ceiling. Appreciate if someone can provide standard detail or description of connection. Marble ceilinh finish will be attached to concrete beam or slab.

thanks for your useful info, we might also a have a problem on finding several contractors who can do screwpiling but 2 or 3 bidders will make the bidding successful. We are considering this as alternative to micropiling, this method is clean and will not generate too much water/mud coming out...

I want to inquire about this piling method and would appreciate any helpful info on screw piling. How do you design a screw pile, can it resist compressive force even in sandy or very loose gravel soil profile? I noticed on some websites that these piles are used for lighthouse, what type of...

try asphalt coating, it is suitable for corrosive environment, just remove it later.

for strengthening of small footing roughening, of old concrete is enough but for large foundation we always use bonding agent.

msucog- both labs are independent, they are not the ones taking samples but the concrete supplier.

bmwater- When I was in college, I worked part time as draftsman for a one man civil/env consultant. My boss designed water water and sewage treatment plants. He calculates BOD, COD area required, volume of tanks, specify equipments, design pipings and finally he is also the one designing the...

msucog- It so happened that the day we have to break cylinders lab 1 techs are apparently not available so we have to go to lab 2 wherein we dont usually go to break our samples. The following day I required the contractor to break another sample from the same pour to lab 1 as I was not...