Viscosity Test for Bitumen

Viscosity Test of Bitumen

विस्कासिता या श्यानता परीक्षण

[I.S: 1206-Part I]

  • उद्देश्य(Object):-

यह परीक्षण बिटूमन/टार प्रतिदर्श का गाढ़ापन ज्ञात करने के लिये किया जाता है। जांच फ्युरल विस्कोमीटर (Furol Viscometer) द्वारा की जाती है।

  • सिद्धान्त(Theory):-

किसी तरल पदार्थ के मुक्त प्रवाह में, इसके गुणों के कारण उत्पन्न प्रतिरोध को, इसकी श्यानता (Viscosity) कहते हैं। जिस तरल पदार्थ की श्यानता जितनी अधिक होती है, उसकी प्रवाह-गति उतनी ही कम होती है (जैसे शहद की श्यानता जल से अधिक होती है)। कम गाढ़ा (अथवा न्यूनश्यानता वाला) बन्धक गिष्टी को केवल चुपड़ता है, इसके चारों तरफ उत्तम बन्धक परत प्रदान नही कर पाता है, जबकि तच्च श्यानता वाला बन्धक गिट्टी की रिक्तियों में भीतर तक नहीं घुस पाता है। अति उच्च श्यानता भी ठीक नहीं है ।  कुछ शोधकर्ता बन्धक की अन्तर्वेशन जांच के स्थान पर श्यानता जांच को वरीयता देते हैं।

विभिन्न ग्रेड के सड़क टार की श्यानता के मान निम्न तालिका में दिये गये हैं। [I.S:  2518-1819]

SR.ROAD TAAR VALUE ACCORDING TO [I.S: 215-1819]
1सड़क टार का ग्रेडतापमान(°C) मेंश्यानता (Sec में )
2RT-13530-55
3RT-24030-55
4RT-34535-60
5RT-45535-70
  • सामग्री(Material):-
  1. कोल-टार
  2. आसुत जल
  1.  10 mm छिद्र (orifice) वाला टार-विस्कोमीटर
  2. जल-बाथ सहित, अभिग्रहण अशांकित जार
  3. तापमापक
  4. हिलाऊ छड़ (Stirrer)
  5.  विराम घड़ी (Stop watch) जो आधे सैकण्ड तक समय दिखा सके
  • विधि(Method):-
  1. टार-प्रतिदर्श को विशिष्ट जांच-तापमान (तालिका P-9-1) से 20°C ऊपर तक  गर्म करें और इसे ठण्डा होने दें। ठण्डा होते समय इसे हिलाऊ छड़ से लगातार हिलाते रहें।
  2. जब प्रतिदर्श का तापमान जांच तापमान से थोड़ा ऊपर आ जाये, इसे टार-कप में भर दें। टार-कप में जल-बाथ (Water Bath) विशिष्ट जांच-तापमान पर बनाये रखा जाता है।
  3. टार-पात्र के ठीक नीचे अभिप्रहण व मापक पात्र (Receiver) रखें । इस पत्र थोड़ा हल्का साबुन-घोल डालकर गीला कर लिया जाता है। को
  4. प्रतिदर्श के जांच-तापमान पर आते ही, टार-पात्र का छिद्र (orifice) खोल दें और विराम-घड़ी चालू कर दें।
  5. जब अभिप्रहण-पात्र (अशांकित जार) में 50 ml तक प्रतिदर्श भर जाये, छिद्र बन्द कर दें और विराम घड़ी पर समय (सैकण्ड में) पढ़ लें।
  6. यह अवधि सैकण्ड में टार-प्रतिदर्श की श्यानता दर्शाती हैं।

उपरोक्त जांच को तीन बार दोहरायें और औसत टपकन-काल ज्ञात कर लें।

  • प्रेक्षण (Observation):-
SR.ओशिफिस से 50ml टार के टपकने की अवधि (सेकंड में )औसत श्यानता (सेकंड में )
a(a+b+c)/3
b
c
  • परिणाम(Result):-
  1. प्रतिदर्श की श्यानता (Viscosity)   = ………….sec हे|
  • सावधानियाँ(Precautions):-
  1. गर्म करते समय, प्रतिदर्श में कोई ढेला (Lump) नजर आये, हिलाकर तोड़ दें, अन्यथा परिणाम दूषित मिल सकते हैं। उसे हिलाऊ-छड़ से
  2. जांच के दौरान जल-बाथ व प्रतिदर्श का विशिष्ट तापमान बनाये रखें।
  3.  टपकन-अवधि को शुद्धता से नोट करें।
  4.  गर्म टार का हस्तन ध्यानपूर्वक करें।
  5. आरिफिस (छिद्र) को साफ रखें।
194 thoughts on “Viscosity Test of Bitumen विस्कासिता या श्यानता परीक्षण”
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  56. The rhomboids are one other major muscle group that cable rows activate.
    The rhomboid main and minor are answerable for retracting, rotating, and elevating the
    shoulder blades. The rhomboids are positioned just below the center fibers of
    the traps.
    The seated row is probably one of the best exercises for focusing on your
    again muscles — including the trapezius, rhomboids, and
    latissimus dorsi. As A Outcome Of this exercise is a compound exercise,
    involving more than one joint, it also prompts a number of
    other muscle tissue as well, including the biceps, triceps, hamstrings, glutes and adductors.
    Whether Or Not you’re doing rear delt rows with dumbbells, barbells, or cables, all are very effective for training your
    higher again and shoulder muscles. It particularly works your
    rear delts, which are small muscles on the back of your shoulders.

    Strong latissimus dorsi muscular tissues contribute to stability in your shoulders.

    Shoulder accidents are prevalent in those who participate in sports activities that use overhead motions, similar
    to basketball, baseball, some observe and area sports, volleyball, tennis, lacrosse, and
    others. The variations and alternate options of the Seated Row embody utilizing machines, changing the grip,
    moving the chest pads, and adjusting the positioning of your arms.
    Each set ought to use gradual and smooth,
    not jerky, actions to totally engage the biceps and back muscles.
    Sitting on the ground allows you to simulate sitting on the machine.
    Hold your again straight and relaxed, together with your shoulders down and again. Doing it will ensure that you primarily
    work the muscles in your arms and back.
    The seated cable row, as talked about in the introduction, is carried out
    on a cable pulley machine. Nonetheless, it can also be performed
    by sitting on the bottom or by setting up a bench in the cable matrix if yours does not.
    Provoke the motion by reaching down to choose up the dumbbell
    off the floor with the other hand while maintaining your back straight and aligned.
    Engage your back and shoulders, lifting the dumbbell
    as a lot as your chest. As Quickly As you reach the top of
    the train, squeeze your shoulder back and be positive to feel the engagement in your again muscles.
    This isn’t based on any sound scientific reasoning, although, and
    is basically just fitness center lore.
    The vertical row entails sitting and dealing with the handles,
    straddled on the seat. Pull your arms again together
    with your elbows tucked in towards your torso, arms nonetheless dealing with one another.
    To stop rounding or arching, keep your spine straight and engage your abdominals.
    Right Here are some common errors you must keep away from when doing cable row.
    The standing and twisting motions of the train require higher core activation, which might help enhance general stability and stability.

    For a seated row, this would depend on the machine weight or
    the resistance band weight. This challenge features testing how a lot weight
    you possibly can row and launch safely. Before trying this problem, it’s essential to heat up first to
    get your muscular tissues prepared and use a spotter in case you are testing heavier weights.

    The proper form for the seated row entails preserving your core engaged from the
    second you get into place. Supporting your core primes you for keeping your arms and
    back muscle tissue totally engaged without damage. A seated row is
    generally performed on a specific seated row machine
    or with a resistance band.
    These can be done with both barbells, dumbbells, or cable machines.

    Whether you’re new to power training or in search of alternatives, understanding
    the muscles labored will allow you to get essentially the most out of this versatile
    exercise. The “to-the-front” method of the lat pulldown train permits for full arm extension and elevated scapular retraction –
    both of which can result in a more practical muscle contraction. Individuals
    additionally are most likely to swing in an try to attract
    momentum for help. If you finish up needing to do
    this, simply lighten the burden and perhaps find a different method
    to impress the ladies within the fitness center. Nonetheless,
    reverse grip rows are a reasonably secure exercise, providing you brace your core and keep away from rounding your lower back.

    Strive to imagine guiding the resistance along with your elbows and never just pulling it with your palms.
    Too much “pulling” will result in a greater diploma of elbow flexion and won’t optimally hit
    the lats. Decrease the load being used and concentrate on getting the cable row attachment all the
    way to your physique. Rear delt workouts don’t come much more convenient than the band pull-apart.
    As properly as being an excellent posterior shoulder train, the band pull-apart is a
    useful postural exercise and a strong antidote to all the sitting that most people
    do. Nonetheless, regardless of being a much less modern train, bent-over
    rows are nonetheless an excellent again builder. By understanding how
    TRX rows work the muscles in your again, you will get the utmost profit from this exercise while avoiding harm.

    Standing cable rows are a really efficient train to strengthen your lats, deltoids,
    traps, rhomboids, core, and legs. The standing cable rear
    delt row with rope is a very efficient and useful train for constructing muscle and power in the rear deltoids and center entice.
    That doesn’t imply the resistance band seated row is a
    waste of time. It’s nonetheless a decent different to the seated cable
    row, particularly if you’re training at house with out dumbbells or
    a suspension trainer. The secondary muscles used embody the biceps, forearms, and rear deltoids.

    One gripped, sit down, place your legs under the thigh pads, and get your physique tight to the chest
    pad. In Contrast to the lat pulldown, you ought to use a much greater load as you’ll have extra involvement from the traps.

    To be clear, none of
    those actions are “better” or “worse”; they only have
    specific situations during which they are more appropriate.

    All three sets of fibers are involved in reverse grip rows, however the
    middle fibers are probably the most lively as they work to tug your shoulders back and
    collectively. The middle traps work with the rhomboids, that are small
    muscular tissues located between the shoulder blades. Positioned on the perimeters of your upper again, the lats
    are the muscles that give you your V-taper and torso width.

    The features of the lats are extension, adduction, and medial rotation of the shoulders.

    Beginning with lighter weights can help you concentrate on getting the
    movement proper before including more resistance.
    So be sure to understand which muscles are labored with low rows so you can get the very best results from this effective train.
    Additionally, they can be utilized to increase muscle measurement
    in the lats and other areas of the again when done with heavier weights or
    higher repetitions. Dumbbell low rows are a great way to exercise without requiring extra equipment
    like cables or free weights. Not so way back, the standard
    rep range advice for muscle development was 6-12. Nonetheless,
    extra lately, it’s been revealed that anywhere from 6 to 35 reps can lead to muscle progress,
    supplied you take your units close to failure (1). Pendlay rows are named after powerlifting
    and weightlifting coach Glen Pendlay.
    It’s a real strength builder that we expect would
    possibly even be a better all-around variation. The trapezius muscle
    or “traps” consists of higher, center, and lower traps. Their main function in the course of the machine high pull is to
    retract the scapula and keep scapula positioning.
    As you pull the load in the path of you, the pressure will want to pull your shoulders forward.
    You don’t need this, so it’s the job of the traps to prevent
    this from happening.
    When it involves deltoid training, most people give attention to
    their deltoids by doing lots of overhead presses and lateral raises.

    Nonetheless, those workout routines solely work two of the three available deltoid heads – anterior and medial.

    With correct form and approach, you possibly
    can maximize your results from this train. To do this train correctly, sit on a bench facing away from a
    cable machine with ft planted firmly on the ground about hip-width aside.
    Now we’ll take a look at alternative workouts to
    additional diversify your exercise routine. By using
    the varied variations of TRX rows, you can improve
    the intensity and problem your muscles differently.

    Your biceps and the long head of your triceps, each found in your upper arms, serve as dynamic stabilizers, that
    means they help stabilize the shoulder as you row.
    Imagine you are pulling a weight in the course of your torso while keeping your
    elbows flared out to the sides. At the top of the movement, concentrate
    on squeezing your shoulder blades together for maximum rear delt activation. The band supplies
    more resistance when it’s stretched and your arms are closer to your
    physique, than it does when your arms are straight.
    To appropriately carry out a Cable High Row, you should sit upright together with your feet firmly placed on the platform and your knees slightly
    bent. Hold your again straight and pull the cable in course of your higher waist while maintaining your elbows close to your body.
    By understanding which muscular tissues are worked, tips on how to correctly carry out the exercise, and variations or options that can be utilized, you
    possibly can maximize your ends in power training.
    The rectus abdominis is the large muscle in the middle of the abdomen. The transverse
    abdominis is deep contained in the stomach and the obliques are on the perimeters of the ribs.
    You contract all of those muscles throughout a cable
    row to produce pressure and additional keep your torso in good
    alignment. With correct kind and common practice, you will notice improved strength in these areas
    and higher posture and general fitness levels. Moreover, they
    might also help enhance posture by strengthening the higher back muscle
    tissue. It is tough to definitively reply whether straight arm pulldowns are better than lat pulldowns because it is decided by the individual’s goals and preferences.
    Maintaining your core tight, slowly row both weights up in the path of your chest whereas preserving them shut together.

    While it’s not one of the primary muscular tissues
    focused by the Seated Cable Row, the rear delts
    nonetheless play an essential role in serving to you execute the movement.
    Using numerous grips and cable row variations, such as Rope
    Cable Row variations, can enhance muscle activation. When you’re performing Deadlifts or
    Bent-Over Rows, the erector spinae keep your backbone in a neutral position, safeguarding your vertebrae and preventing a stubborn harm.

    By figuring out the errors to keep away from and taking the best actions, you could full
    the exercise safely and effectively. So let’s get started
    on avoiding those frequent mistakes and making this
    train a normal a half of your health training. Seated cable rows are a horizontal pull train that’s performed on a
    cable pulley machine. The cable pulley machine eliminates
    a number of the want for stabilization that’s required of extra technically demanding row variations such as the barbell row and dumbbell row.
    The bent-over row can substitute the seated row with related benefits.

    Yes, novices can perform rear delt rows, but it’s
    necessary to start with a lighter weight and concentrate on correct form.
    Rear Delt row is a really efficient and practical exercise for
    constructing muscle and power within the rear deltoids and
    upper back. Nonetheless, although they could look the same, seated rows with a resistance band aren’t as good as seated rows accomplished on a cable row
    machine. In that case, you may want to avoid unsupported bent-over rows and stick with actions like seated cable rows and chest-supported rows, that are far more lower back-friendly.
    While reverse grip rows are extra lower-back-friendly than common bent-over rows, the decrease again continues to be strongly involved.

    You can vary your workouts by including these seated row challenges.
    These well-liked challenges take the normal seated row and add
    various levels of difficulty for you to achieve. One Other function of a seated row
    challenge is importing them to social media with the appropriate challenge hashtag.
    It’s essential to do that step slowly and intentionally, concentrating on the energy in your biceps and back muscle tissue.
    Modifying your seated rows are an effective way to change
    things up to match your health level. To fully activate your muscles, you want to carry out each rep slowly.
    Think About pulling your shoulder blades down and towards one another, defending your shoulders and getting a killer again exercise.

    Give them the eye they deserve by together with dumbbell
    rear delt rows in your shoulder or back workouts.
    The straight arm pulldown is a great exercise for targeting the muscles of the again,
    shoulders, and arms. If your goal is pure power, nonetheless, it’d align with your aim to use a little bit of momentum in the barbell row.
    In actual life (or competitions), we often use momentum to be more practical once we lift stuff.
    Subsequently, if you are coaching for sports or strongman competitions, some swinging in your barbell rows
    may be useful. Just keep an eye fixed on your total coaching quantity on your decrease back, as heavier weights mean more stress.

    Proper execution with a tight core and controlled actions enhances muscle density
    and development. They primarily goal the latissimus dorsi, the most
    important muscle in your again, helping you achieve that impressive “V” shape.
    If you’re in search of a coaching program that covers every
    muscle in the physique in addition to the again, we’ve obtained
    you lined. Verify out our ATHLEAN-X programs to see which is one of
    the best fit for your targets and fitness degree.

    You nonetheless have to interact your decrease
    body and your core to take care of place, although. This change in grip
    strikes some of the work away out of your back muscular
    tissues and to your biceps. It should also be
    noted that this grip most likely increases the
    danger of a biceps tear. You can tolerate (and grow from)
    a better training quantity should you distribute it over more workouts.
    Because of this, you’ll doubtless only have the flexibility to pull lighter weight with this move–since your
    legs and core end up bracing against the weight. Maintaining a
    flat again is part of what retains this train so lower
    back-safe. As quickly as you begin to curve your again,
    you potentially put your self in a foul place for
    a again injury.

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