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Compound admixture for high performance concrete

A high-performance concrete and composite admixture technology, applied in the field of composite admixtures, can solve the problems of high-performance concrete and high raw material costs, and achieve the effects of protecting the natural ecological environment, reducing production costs, and reducing costs

Inactive Publication Date: 2012-11-07
BEIJING QING MAI HUA QING HLDG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a composite admixture for high-performance concrete, which solves the problems that high-silicon tailings cannot be used in existing high-performance concrete and the cost of raw materials is high, improves the strength and durability of concrete, reduces environmental pollution, and reduces production cost, protect the natural ecological environment, and promote the sustainable development of the circular economy of mineral resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use P.o42.5 grade cement (58Mpa), high-silicon tailing sand, gravel, fly ash S1, S2, high-efficiency water reducer, and try to mix C110 plastic high-strength concrete.

[0019] 1. Determine the design strength of concrete: Rs28=1.15×100=115MPa plastic high-strength concrete

[0020] 2. Determine the particle diameter and apparent density of concrete constituent materials:

[0021] Gravel particle diameter 05-10mm; fineness modulus greater than 2.9 tailings artificial sand; cement specific surface area 4.3-10.6 times the fly ash S1, S1 specific surface area 4.3-10.3 times more than the fly ash S2.

[0022] Px=2750, Py=2700, Pc=2680, Ps1=Ps2=1900

[0023] 3. Determine the consumption of the main constituent materials for the preparation of near unit volume (close to one cubic meter): e set=40%, A=0.8, W / C=0.26

[0024] X=2750×(0.8-0.4)=1100kg

[0025] Y=2700×(1-0.4)×0.4=648kg

[0026] C ash=2680×(1-0.4)×0.42=257kg

[0027] C=C glue+C ash=138+257=395kg

[0028] S1=19...

Embodiment 2

[0040] Use P.o32.5 grade cement (42.1Mpa), high-efficiency water reducer, high-silicon tailings sand, and gravel to prepare C50 self-compacting concrete.

[0041] 1. Determine the design strength of concrete: Rs28=58Mpa self-compacting concrete

[0042] 2. Particle diameter and apparent density of concrete constituent materials: gravel particle diameter 05-10mm; fineness modulus greater than 2.7, tailings artificial sand; Px=2750, Py=2700, Pc=2650;

[0043] 3. Determine the dosage of the main constituent materials for the preparation of nearly unit volume concrete:

[0044] eset=50%, A=0.8, W / C=0.28;

[0045] X=2750×(0.8-0.5)=825kg

[0046] Y=2700×(1-0.5)×0.5=675kg

[0047] C ash=2650×(1-0.5)×0.52=331kg

[0048] C=C glue+C ash=138+331=469kg

[0049] W=469×0.28=131.3kg

[0050] Four. Concrete mix volume: Vconcrete=0.3+0.5×0.5+469 / 2650+0.1313=0.858m3;

[0051] Concrete porosity: econcrete = 131.3 / 858 = 15.3%;

[0052] Five. Concrete preparation strength: m=log 1.915.3=4....

Embodiment 3

[0062] Use P.o42.5 grade cement (50.1Mpa), high-efficiency water reducer, high-silicon tailings, gravel, fly ash, gasoline to prepare C60 plastic permeable concrete, the ambient temperature is above 200C, and the water permeability is about 0.001 cm / s .

[0063] 1. Determine the concrete design strength: Rs28=69Mpa permeable concrete

[0064] 2. Particle diameter and apparent density of concrete constituent materials:

[0065] Gravel particle diameter 05-10mm; fineness modulus greater than 2.7 tailings artificial sand; cement specific surface area 4.3-10.3 times finely ground fly ash S1, S1 specific surface area 4.3 times more than ground fine fly ash S2.

[0066] Px=2750, Py=2700, Pc=2680, Ps1=Ps2=1900, PH=660

[0067] 3. Determine the amount of the main constituent materials of the concrete near unit volume:

[0068] eset=40%, A=0.8, W / C=0.28,

[0069] X=2750×(0.8-0.4)=1100kg

[0070] Y=2700×(1-0.4)×0.4=648kg

[0071] C ash=2680×(1-0.4)×0.42=257kg

[0072] C=C glue+C ...

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Abstract

The invention relates to a composite admixture of a high-performance concrete, which comprises high silicon tailings, fly ashes, limestone and zeolite. The weight percentages of the above components are as follows: 25% of high silicon tailings, 55% of fly ashes, 12% of limestone and 8% of zeolite. Due to the adoption of the composite admixture of a high-performance concrete, the problems that a conventional high-performance concrete can not adopt high silicon tailings and is high in material cost are solved. Meanwhile, the strength and the durability of the concrete are improved, and the environmental pollution and the production cost are reduced. Therefore, the natural ecological environment is protected, while the sustainable development of the circular economy of the mineral resource is promoted.

Description

technical field [0001] The invention relates to a composite admixture for high-performance concrete. Background technique [0002] The cement industry, which is the main raw material of traditional concrete, is a "sunset industry" with serious pollution and unsustainable development. Now countries around the world have formulated the performance indicators of "green" building materials, and the new concept of "green" high-performance concrete (GHPC) has been proposed. The so-called "green" refers to replacing cement with other materials as much as possible in concrete materials to produce new types of concrete with better performance, lower energy consumption and less environmental pollution. High-performance concrete is the development direction of concrete in the future, and it was once called 21st century concrete in foreign countries. [0003] The characteristics of high performance concrete: [0004] 1. Use as little cement clinker as possible to reduce air pollution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/12C04B18/08C04B14/28
CPCC04B28/021Y02W30/91C04B14/04C04B14/047C04B22/064C04B18/12
Inventor 黄西江
Owner BEIJING QING MAI HUA QING HLDG GRP CO LTD