Home » Products » Con Proof NB

Con Proof NB

CON PROOF-NB is supplied as brown liquid based on sulphonated Nepthalene condensates. The powerful dispersing action of the superplasticiser can be used in many ways to obtain dense, high strength durable concrete (M35, M40 and M45). The high water reduction properties can mak.  Ideal application in precast concrete where high early strength is of paramount importance. CON PROOF-NB is chloride free.

Share

    Description

    NORMAL SUPER PLASTICISER

    Increased Workability : CON PROOF-NB when incorporated in concrete mixes increases the workability without additional water than the designed value ; thus leading to easy placement and finishing without the risk of segregation and bleeding.

    Increased Strength : CON PROOF-NB can be used to reduce upto 30% water for a given workability leading to increased early and ultimate (28 days) strength. Such high early strength and early removal of forms lead to increased productivity of precast concrete and the production of high strength concrete without increasing cement content.

     

    Product
    CON PROOF-NB is a high range water reducing admixture for concrete conforming to BS 5075 part -3, IS 9103 : 1999 and ASTM C-494 type ‘F’ & BS : EN 934-2 : 1998.

     

    Uses
    To produce pumpable concrete. high water reduction properties leads to high early & 28 days strength & flowing concrete, to produce high workability concrete requiring little or no vibration during placing.

     

    Benefits

    • Increases strength
    • High early and 28 days strength, if advantage of water reduction is taken
    • Used in precast concrete work
    • Safe in prestressed concrete
    • Improves cohesion thus aids pumping of concrete
    • Facilitates rapid placing of concrete with little or no vibration
    • Makes the concrete denser, hence durability increased
    • High water reduction is possible as per requirement

     

    TYPICAL RESULTS WITH USE OF CON PROOF-NB IN M30 GRADE CONCRETE
    ■ 0.40 w/c ratio
    ■ 53 grade cement
    ■ Washed clean graded aggregate MSA 20mm
    ■ Sand zone II

    Mix Detail Slump Strength (kg/cm²)
    0min 3days 7days 28days
    Mix I Controll

    Mix II 0.6 CON PROOF-NB

    45mm 125m 110

    125

    205

    235

    300

    350

     

    ■ 0.35 W/C RATIO
    ■ 53 GRADE CEMENT
    ■ WASHED CLEAN GRADED AGGREGATES. MSA 20MM
    ■ SAND ZONE II

     

    Notes

    CUBE MOULDS COMPACTED AT REDUCED SLUMP. SUBMERGED CURING @ (AT 27± 2ºC) PERFORMANCE TEST

     

    Life & Storage
    CON PROOF-NB has minimum self life 24 months, if kept in
    A dry store in un opened container, temperature below 50degree

     

    Health & Safety
    CON PROOF-NB is non toxic. However, splashes on the skin should be washed well with water and if contact with eye occurs, wash well with water and seek medical advise, vigorous stirring is required if containers containing admixture is allowed in stationary condition for more than week or so.

     

    Dosage & Packing
    The normal dosage is about 0.6%-1.5% by weight of cementitious material. However, the optimum dosage is to be determined by site trials.
    5, 20, 50, 200 kg. carboys.

    Technical Information

     

    Physical State Brown liquid,
    Chloride Content 0.2% Max.,
    pH 7.5 ± 0.5
    Air Entrainment Less than 1% additional air entrained

     

    How to Use

    CON PROOF-NB can be used with all types of Portland cements and is chloride free. It has no significant effect on setting times at normal dosage levels. It can be used in mortar grouting of prestressed wires. The normal dosage is about 0.6%-1.5% by weight of cement. However, higher dosages can be used with suitable changes in the mix especially sand to avoid segregation if no water reduction is made. Overdosing upto double the normal dosage levels may lead to retardation of setting times and may tend to segregate and produce ultra fluid concrete