Method for producing high-strength high damping concrete

A high-damping, concrete technology, applied in the field of building materials, can solve the problems of limited damping performance, mismatch of use, mechanical properties and deformation performance, etc. Effect

Inactive Publication Date: 2008-05-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of fiber into concrete does not reduce the mechanical properties of concrete, but the effect of improving the damping performance is limited; the introduction of viscoelastic materials such as rubber powder and polymers can significantly improve the damping performance of concrete materials, but they are mainly polymer materials, and the mechanical properties and The deformation performance does not match the concrete material, and the compressive strength and elastic modulus of the concrete material can be significantly reduced when the dosage is small, so it cannot be used as a structural material
Concrete materials have a contradiction between damping and strength that cannot be taken into account with each other

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of high-strength high-damping concrete, it comprises the steps:

[0037] Raw material preparation:

[0038] Light aggregate: particle size 5-20mm, apparent density 1200-1500kg / m 3 , Bulk density 700~1100kg / m 3 , Clay ceramsite with cylinder compressive strength ≥ 6.5MPa;

[0039] The polymer emulsion is carboxylated styrene-butadiene latex with a solid content of 50%;

[0040] The cement is 42.5# ordinary Portland cement;

[0041] Silica fume has a specific surface area greater than 20,000m 2 / kg, the content of active silica is more than 90%;

[0042] The high-efficiency water-reducing agent is a polycarboxylate high-efficiency water-reducing agent, and the water-reducing rate is 20-40%;

[0043] Ordinary aggregates are granite, with a maximum particle size of 25-32.5mm;

[0044] The fine aggregate is river sand with a fineness modulus of 2.6 to 3.1;

[0045] The mineral admixture is silica fume;

[0046] The polypropylene fiber has a di...

Embodiment 2

[0053] The preparation method of high-strength high-damping concrete, it comprises the steps:

[0054] Raw material preparation:

[0055] Light aggregate: particle size 5-20mm, apparent density 1200-1500kg / m 3 , Bulk density 700~1100kg / m 3 , Broken shale ceramsite with cylinder compressive strength ≥ 6.5MPa;

[0056] The polymer emulsion is a polyvinyl alcohol polymer emulsion, and the solid content is 40%;

[0057] The cement is 42.5# or 52.5# ordinary Portland cement;

[0058] Silica fume has a specific surface area greater than 20,000 to 30,000m 2 / kg;

[0059] The high-efficiency water-reducing agent is a polycarboxylate high-efficiency water-reducing agent, and the water-reducing rate is 20-40%;

[0060] The common aggregate is basalt with a maximum particle size of 25-32.5mm.

[0061] The fine aggregate is river sand with a fineness modulus of 2.6-3.1.

[0062] The mineral admixture is fly ash with a specific surface area of ​​400m 2 / kg;

[0063] The polypropy...

Embodiment 3

[0071] The preparation method of high-strength high-damping concrete, it comprises the steps:

[0072] Raw material preparation:

[0073] Light aggregate: particle size 5-20mm, apparent density 1200-1500kg / m 3 , Bulk density 700~1100kg / m 3 , Fly ash ceramsite with cylinder compressive strength ≥ 6.5MPa;

[0074] The polymer emulsion is a polyvinyl alcohol polymer emulsion with a solid content of 20%;

[0075] The cement is 42.5#, slag cement;

[0076] Silica fume has a specific surface area greater than 20,000 to 30,000m 2 / kg;

[0077] The high-efficiency water-reducing agent is Nai series sulfonate FDN series high-efficiency water-reducing agent, and the water-reducing rate is 20-40%.

[0078] The common aggregate is diabase with a maximum particle size of 25mm.

[0079] The fine aggregate is machine-made sand with a fineness modulus of 2.6-3.1.

[0080] The mineral admixture is silica fume;

[0081] The polypropylene fiber has a diameter of 20-48 μm, a length of 3-...

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Abstract

The invention relates to a preparation method of concrete with high strength and high damp. The invention is characterized in that the preparation method includes the following steps: firstly, the pretreatment of the light aggregate: (1) the feeding and vibration reduction treatment of the light aggregate: the light aggregate adsorbs the polymer to obtain feeding and vibration reduction treatment light aggregate; (2) sealing and reinforcing treatment on the surface of the feeding and vibration reduction treatment light aggregate: the feeding and vibration reduction treatment light aggregate obtained at the first step is put into sealing and reinforcing treatment slurry to mix for 1 to 3 minutes, then being fished out, and then conserved for 3 days in the condition of 85 percent to 95 percent of relative humidity and the temperature of 23 DEG C to 27 DEG C, wherein, pretreatment light aggregate is obtained; secondly, preparation for the concrete with high strength and high toughness: the concrete with high strength and high toughness is formed by evenly mixing water, common coarse aggregate, the pretreatment light aggregate, cement, fine aggregate, mineral addition, fibre, emulsified polymer and high efficiency water reducing agent. The invention can effectively increase the strength and the damp performance of the concrete.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a preparation method of high-strength and high-damping concrete. Background technique [0002] Concrete building structures such as high-speed railways, highway bridges, high-rises, and oceans are frequently subjected to moving loads, impact loads, wind waves, and earthquakes during service. These external excitations not only affect the safety and comfort of the structure, but also cause structural differences. Degree of damage or even fracture damage. The main reason for this problem is the poor damping performance of concrete. The external excitation energy is mainly dissipated through the mechanical energy generated by the friction between cracks in the concrete structure and converted into heat energy, at the cost of structural damage or irreversible deformation and loss of some structural functions. In view of the above problems, at present, it is mainly achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/10C04B14/04C04B18/12C04B16/06
CPCC04B28/02C04B2111/52C04B18/027C04B20/1077Y02W30/91C04B20/1033C04B2103/302C04B14/12C04B20/026C04B14/108C04B24/226C04B18/08C04B24/2641C04B14/048C04B14/06C04B16/0633C04B24/2676C04B40/0028C04B40/0082C04B14/02C04B14/14C04B24/2623C04B14/068C04B14/08
Inventor 胡曙光丁庆军田耀刚王小磊黄修林田焜吕林女何永佳王发洲林清陈造文
Owner WUHAN UNIV OF TECH
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