A kind of concrete for reinforced concrete composite structure C45 strength grades

A kind of concrete for reinforced concrete composite structure C45 strength grades

  • CN 105,439,517 B
  • Filed: 12/25/2015
  • Issued: 02/27/2018
  • Est. Priority Date: 12/25/2015
  • Status: Active Grant
First Claim
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1. A kind of 1. concrete for reinforced concrete composite structure C45 strength grades, it is characterised in that the concrete according tokg/m3Match ratio be:

  • Cement;

    fine aggregate;

    coarse aggregate;

    water;

    high efficiency water reducing agent;

    defoamer:

    Silicon ash;

    flyash:

    Composite exciting agent=310;

    698;

    1197∶

    142∶

    6∶

    1∶

    30∶

    70∶

    2.5;

    The cement selects P.O425R Portland cements;

    The fine aggregate is using thick river sand during particle is round and smooth, quality is hard, grading is good, modulus of fineness 2.8;

    The cubic compressive strength of the coarse aggregate parent rock is not lower than 1.2 times of institute'"'"'s concrete batching intensity, rubble grainFootpath is 5mm~25mm, and 25mm is not to be exceeded in maximum particle diameter, and grading is good, and clay content is controlled below 1.0% in mass, mudBlock content is controlled below 0.5% in mass, and pin, sheet-like particle content are not preferably greater than 5% in mass, and must not be mixed into windChange particle, aggregate water soluble chloride converts into 0.02% that chloride ion content is no more than aggregate quality;

    Carry out the ConcreteWhen, fed intake using 5~Φ

    of continuous size fraction rubble Φ

    25;

    The high efficiency water reducing agent selects polycarboxylic acid series high efficiency water reducing agent, and water-reducing rate is more than 25%;

    The defoamer selection AGITAN@P803 powder defoamers;

    The silicon ash selects high-quality silicon ash, and the dioxide-containing silica in silicon ash should be not less than 85%, and moisture content should be not more than3%, loss on ignition should be not more than 4%, and chloride ion content should be not more than 0.1%, and pozzolanic activity index should be greater than 90%, compare surfaceProduct should be not less than 15000m2/kg;

    High-quality I grade of flyash that the flyash is produced using the advanced power plant of coal burning process, and its fineness is with 0.045mm square holes12% should be not more than by tailing over meter, and loss on ignition should be not more than 5%, SO3Content should be not more than 3%, and water content should be not more than 1%,Water demand ratio should be not more than 95%, and specific surface area should be greater than 400m2/kg;

    The composite exciting agent selection self-control flyash composite exciting agent FACA, by the water glass solution that percentage by weight is 73%With 27% dihydrate gypsum CaSO4·

    2H2O is formulated;

    The composite exciting agent is prepared by following methods:

    Certain density alkaline solution is made by solid sheet NaOH is soluble in water first, then with water that modulus is 2.4~3.3Glass mixes, and it is 1.0 water glass solutions to be modulated into modulus, takes 73% water glass solution and 27% dihydrate gypsum CaSO4·

    2H2O is mixed, and produces composite exciting agent FACA;

    The concrete slump is 90mm, cubic compressive strength 50.43MPa, split tensile strength 4.62MPa, with shaped steelAdhesion strength is 3.23MPa, and concrete infiltration grade is IV grade.

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