Concrete pumping agent as well as preparation method and application thereof

A concrete pump and concrete technology, which is applied in the field of building materials, can solve the problems that the surface smoothness needs to be further improved, and the clear water effect cannot meet the fair-faced concrete, etc., and achieve good easy-to-tightness and exhaust capacity, excellent clear water effect, improved and efficiencies

Active Publication Date: 2014-01-22
CHINA 19TH METALLURGICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The clear-water concrete pumping agent can improve the workability of clear-water concrete to a certain extent, making the concrete surface smoother and smoother, and the clear-water effect is excellent, but there are still a small amou

Method used

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  • Concrete pumping agent as well as preparation method and application thereof
  • Concrete pumping agent as well as preparation method and application thereof
  • Concrete pumping agent as well as preparation method and application thereof

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preparation example Construction

[0031] The preparation method of the concrete pumping agent of the present invention comprises the following steps: (1) Accurately weigh various components by weight; (2) Mix and stir polycarboxylate water reducer, water, and defoamer for 30-40 minutes ; (3) Add rheological agent, retarder, air-entraining agent and stir for 15-30 minutes, that is.

[0032] The invention also provides the application of the concrete pumping agent of the invention in fair-faced concrete. Clear-water concrete pumping agent of the present invention is light brown liquid, and density is 1.08g-1.30g / cm 3 , pH is 6.5-7.0, its dosage in concrete is 0.7-2.6wt% of the amount of cementitious material in concrete, the accurate dosage is based on ensuring the flow performance of concrete, slump retention performance and the effect of clearing water on the surface of concrete, according to Test OK.

Embodiment 1

[0039] Take 3.3kg of water-reducing polycarboxylic acid mother liquor (ether, 40% solid content), 0.025kg of dimethyl silicone oil, and 5.97kg of water, mix well and stir for 30 minutes, then add 0.3kg of LiqSand concrete rheological agent, 0.25 sodium gluconate kg, white sugar 0.15kg, triterpene saponin 0.005kg, mix well and stir for 20min to obtain the special pumping agent for fair-faced concrete. The recommended dosage of the obtained pumping agent is 0.8-1.3wt% of the amount of the cementitious material in the concrete.

[0040] Test results: The concrete surface is flat and smooth, except for the holes caused by the mold itself, there are basically no other voids on the surface. No honeycomb, pitted surface, uneven phenomenon. For detailed results, see figure 1 shown

Embodiment 2

[0042] Take 2.0kg of water-reducing polycarboxylic acid mother liquor (ether, 40% solid content), 0.02kg of emulsified silicone oil, and 7.52kg of water. kg, sodium citrate 0.15kg,

[0043] AOS air-entraining agent 0.01kg, mixed evenly and stirred for 25 minutes, then the special pumping agent for fair-faced concrete was obtained. The recommended dosage of the obtained pumping agent is 1.5-2.2wt% of the amount of cementitious material in concrete.

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Abstract

The invention relates to the field of building materials and in particular relates to a concrete pumping agent as well as a preparation method and an application thereof. The concrete pumping agent comprises the following components in parts by weight: 15-35 parts of polycarboxylate-type water reducing agent, 0.1-0.6 part of defoaming agent, 1-3 parts of rheological agent, 1-5 parts of retarder, 0.03-0.2 part of air entraining agent and 56.2-82.87 parts of water, wherein solid content of the polycarboxylate-type water reducing agent is 40%. By adopting the concrete pumping agent, the problems that concrete prepared by a common concrete pumping agent is rough in surface and many air holes, voids and pits are formed can be effectively solved, and a good effect on formation of a clear water and mirror surface effect of bare concrete is realized.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a concrete pumping agent and its preparation method and application. Background technique [0002] Fair-faced concrete, also known as decorative concrete, uses the original concrete pouring surface or the concrete surface treated with a transparent protective agent as the outer surface of the building, and is named for its great decorative effect. The fair-faced concrete is poured into shape at one time, without any decoration on the surface, and the natural color of the concrete is directly used as the finish. Therefore, fair-faced concrete requires its mixture to be uniform in color, have good workability (fluidity, cohesion, and water retention), and must not segregate and bleed. In pumping construction, not only good fluidity is required, but also good cohesion is required, so that fresh concrete can be easily poured and formed without delamination and segregation, and ceme...

Claims

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Application Information

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IPC IPC(8): C04B24/42
Inventor 李萍蔡其全陈军超宋明健
Owner CHINA 19TH METALLURGICAL CORP
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