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    #1

    Water discolouration

    Could you please check my draft mail?

    This is refers to your observation on water discolouration for curing/backfilling, we had investigated and found that the tanker which you witnessed was having some rust. In addition, we also observed another water tanker from the same source of water which not shows any discolouration. We collected a sample from both water tanker for chemical analysis testing to the third party laboratory test.

    As per your instruction, Construction Supervisor returned that tanker immediately. However, we emphasized our constuction team not to use that water tanker (rusted one) until the testing is completed.
    Last edited by Kumar Nadimuthu; 09-Jan-2017 at 20:44.
    "In sandy soil, when deep you delve, you reach the springs below; The more you learn, the freer streams of wisdom flow." - Thiruvalluvar

  2. teechar's Avatar
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    #2

    Re: Water discolouration

    Quote Originally Posted by Kumar Nadimuthu View Post
    Could you please check my draft email?

    This is refers With reference to your observation on of curing/backfilling water discolouration, for curing/backfilling, we had have investigated the matter and found that the tanker which you witnessed observed was having had some rust. In addition, we also observed another water tanker with water from the same source, of water which did not show any discolouration. We have collected samples from both water tankers for chemical analysis and testing to the by a third-party laboratory. test.

    As per your instruction, the construction supervisor returned turned back that tanker immediately. However, we emphasized to our construction team that they are not to use that water from the rusted tanker (rusted one) until the testing is completed.
    .

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    #3

    Re: Water discolouration

    Rust consists of suspended particles which do not really change the colour of the water, unlike soluble chemicals.
    I would call the mixing of rust and water "contamination" rather than "discolouration".

    What do you mean by "curing/backfilling water"?
    I am not a teacher.

  4. Member
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    #4

    Re: Water discolouration

    Not a teacher.

    1. Concrete structures shall be cured (Adding water) for 7 days from the date of casting in order to achieve the higher strength.
    2. Backfilling water used for soil compaction to fill up the porous between soil particles.

    The allowable TDS for Curing and backfilling water as per specification is 500 ppm and 10,000 ppm respectively.
    Last edited by Kumar Nadimuthu; 13-Jan-2017 at 11:53.
    "In sandy soil, when deep you delve, you reach the springs below; The more you learn, the freer streams of wisdom flow." - Thiruvalluvar

  5. teechar's Avatar
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    #5

    Re: Water discolouration

    Quote Originally Posted by Kumar Nadimuthu View Post
    Not a teacher.

    1. Concrete structures shall be are typically cured (by adding water) for 7 days from the date of casting in order to achieve the higher full strength.
    2. Backfilling water is used for soil compaction to fill up the pores ous between soil particles.
    The allowable TDS for curing and backfilling water as per the ABCD specification is are 500 ppm and 10,000 ppm respectively.
    .

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