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Concrete meeting ultrahigh pumping requirement and pumping method of concrete

A technology for ultra-high pumping and concrete, which is applied in chemical instruments and methods, clay preparation devices, gas/liquid distribution and storage, etc. It can solve the problems of unresolved bleeding and high viscosity, and achieve the realization of ultra-high-rise pumps transmission, high reliability, and reduced vibration

Inactive Publication Date: 2019-04-09
陕西宏基混凝土构件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for C60, C50 and C35 high-strength concrete, its viscosity is relatively high, and the above-mentioned technical solution still cannot solve the bleeding problem, and solves the technical problem of ultra-high pumping

Method used

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  • Concrete meeting ultrahigh pumping requirement and pumping method of concrete
  • Concrete meeting ultrahigh pumping requirement and pumping method of concrete
  • Concrete meeting ultrahigh pumping requirement and pumping method of concrete

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Experimental program
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Effect test

Embodiment 1

[0049] The concrete that meets the ultra-high pumping disclosed by the embodiment of the present invention 1, its strength grade is the high-strength concrete of C60, comprises the raw material of following composition (kg / m 3 ):

[0050]

[0051] The water-to-adhesive ratio is 0.28;

[0052] in,

[0053] The choice of cement is mainly based on the adaptability of cement and admixtures, the amount of mixed materials in cement, and the strength of mortar:

[0054]

[0055]

[0056] After the testing of three major brands of cement, the strength indicators are in line with the provisions of the national standard GB175-2007. However, in terms of adaptability to polycarboxylate superplasticizers, Jidong Cement has been tested many times, and the expansion SF of the clean slurry test is relatively stable and has no bleeding. Yaobai cement has a large difference in expansion degree SF through the clean slurry test, and there is bleeding, and the adaptability to polycarboxy...

Embodiment 2

[0065] The concrete that meets the ultra-high pumping disclosed by the embodiment of the present invention 2, its strength grade is the high-strength concrete of C60, comprises the raw material of following composition (kg / m 3 ):

[0066]

[0067] The water-to-adhesive ratio is 0.28;

[0068] in,

[0069] The cement is P042.5 cement;

[0070] The sand is a mixture of Lantian medium coarse sand and machine-made sand. The medium-coarse sand has a fineness modulus of 3.0 and a mud content of 3.0%. Other indicators are in line with the requirements of the GB14684-2011 standard. The modulus is 2.9, the crushing index is 24%, the stone powder content is 10%, and the machine-made sand content is 150kg / m 3 ;

[0071] The stone adopts 5-25mm continuous graded crushed stone, and its crushing index is 7%;

[0072] The admixture is double-mixed with fly ash and mineral powder, wherein the fineness of fly ash is 20%, the loss on ignition is 3%, and the water demand ratio is 100%. T...

Embodiment 3

[0075] The concrete that meets the ultra-high pumping disclosed by the embodiment of the present invention 3, its strength grade is the high-strength concrete of C60, comprises the raw material of following composition (kg / m 3 ):

[0076]

[0077] The water-to-adhesive ratio is 0.28;

[0078] in,

[0079] The cement is P042.5 cement;

[0080] The sand is a mixture of Lantian medium coarse sand and machine-made sand. The medium-coarse sand has a fineness modulus of 3.2 and a mud content of 2.5%. Other indicators are in line with the requirements of the GB14684-2011 standard. The modulus is 2.9, the crushing index is 24%, the stone powder content is 10%, and the machine-made sand content is 150kg / m 3 ;

[0081] The stone adopts 5-25mm continuous graded crushed stone, and its crushing index is 9%;

[0082] The admixture is double-mixed with fly ash and mineral powder, wherein the fineness of fly ash is 25%, the loss on ignition is 5%, and the water demand ratio is 105%. T...

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Abstract

The invention relates to the technical field of concrete pumping and discloses concrete meeting an ultrahigh pumping requirement and a pumping method of the concrete. The concrete contains the following raw materials with the components (kg / m<3>): 350 of cement, 756 of sand, 924 of stones, 60 of admixture, 16.5 of polycarboxylate superplasticizer, 150 of water, 120 of fine aggregates and 3.3 of BTC functional additive; and the pumping method comprises the steps: paving pipelines, namely connecting horizontal pump pipes to a conveying pump, arranging a stop valve on a position where the horizontal pump pipes are 8-12 m away from the conveying pump, fixing the horizontal pump pipes on a plurality of concrete piers by using embedded parts, and fixing vertical pump pipes on a wall body by using a plurality of clamping pipes; and fixing the junctions of the horizontal pump pipes and the vertical pump pipes by using concrete blocks. Due to the addition of a water retaining component in the high-performance polycarboxylate superplasticizer and the use of the BTC functional additive, the viscosity of high-strength concrete is successfully reduced, meanwhile, the problem that the strength of the concrete is affected after coal ash is added is successfully solved, and ultrahigh pumping of the high-strength concrete is realized.

Description

technical field [0001] The invention relates to the technical field of concrete pumping, in particular to concrete satisfying ultra-high pumping and a pumping method thereof. Background technique [0002] Ultra-high pumping concrete technology generally refers to modern concrete pumping technology with a pumping height exceeding 200m. For ultra-high pumping of high-grade concrete with a height greater than 200m, the concrete has high strength and high viscosity, so the pumping pressure is high. Pumping construction is particularly difficult, bringing a series of technical problems to be discussed in the entire construction pouring process. [0003] The Chinese invention patent with the authorized announcement number CN105884300B discloses a C30 self-compacting concrete that can be pumped at an ultra-high height of 620 meters and its preparation method. The raw material components and mass fraction ratio of the concrete are: 6.5%-7.5% cement, 3.5% %-4.0% fly ash, 1.1%-2.1% m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04F17D1/14B28C5/00F16L3/12
CPCB28C5/003C04B28/04C04B2111/00146C04B2201/50F16L3/12F17D1/088F17D1/14C04B18/141C04B18/08C04B14/02C04B14/06C04B2103/302C04B24/383C04B2103/0068
Inventor 林智峰
Owner 陕西宏基混凝土构件有限责任公司
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