C60 ultrahigh pumping concrete

An ultra-high pumping and concrete technology, applied in the field of ultra-high pumping concrete, can solve the problems of concrete surface cracks, different shrinkage rates, hidden safety hazards, etc., and achieve the effect of improving crack resistance, improving thermal conductivity, and avoiding cracks.

Active Publication Date: 2017-07-25
天津金隅混凝土有限公司
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Problems solved by technology

Since concrete is a poor conductor of heat, it is difficult for the temperature inside the concrete to be transferred to the concrete surface, while the surface of the concrete dissipates heat quickly, and the temperature difference between

Method used

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  • C60 ultrahigh pumping concrete
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  • C60 ultrahigh pumping concrete

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] The preparation method of each comparative example is the same as that of Example 1.

[0056] The performance indicators of the above comparative examples are shown in Table 5.

[0057] Table 5 Performance test results of concrete prepared by each comparative example

[0058] Performance test results Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 Comparative example 7 Slump extension / mm685675680650645640670 T 500 / s

[0059] As can be seen from the above table, in Comparative Example 1, alumina ceramic beads are added. Compared with Example 1, the thermal conductivity of alumina ceramic beads is much lower than that of beryllium oxide ceramic beads; in Comparative Example 2 Although the added steel ball has better thermal conductivity, the quality of the steel ball is heavier and the surface of the steel ball is relatively smooth, and the bonding force with the surface of the carbon fiber...

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Abstract

The invention relates to C60 ultrahigh pumping concrete. The C60 ultrahigh pumping concrete is prepared from the following raw materials in parts by weight: 350 to 370 parts of P.O42.5-grade cement, 66 to 74 parts of S95 mineral powder, 48 to 52 parts of F(I) coal ash, 75 to 85 parts of high-performance mineral admixture, 725 to 765 parts of sand, 930 to 970 parts of 5 to 20 mm particle-size gravel, 8.0 to 9.0 parts of additives, and 151 to 163 parts of water. The concrete not only has good mobility, but also meets the strength requirement of C60 concrete; and the internal heat conduction efficiency of the pouring molded concrete is high, the surface of the concrete in the hardening process hardly has a crack, and the safety potential hazard is reduced.

Description

Technical field [0001] The invention relates to the field of ultra-high pumping concrete, and more specifically, it relates to a C60 ultra-high pumping concrete. Background technique [0002] Ultra-high pumping concrete technology refers to modern concrete pumping technology with a pumping height of more than 200m. For super high-rise buildings, the concrete that constitutes the super high-rise building needs to have a higher strength, so high-strength super-high-rise pumping concrete requires a large amount of cement and has a high strength level. [0003] Due to the large amount of concrete required for pouring, a large amount of heat of hydration will be generated during concrete hydration during the hardening process, and the higher the strength level, the greater the heat of hydration, and the temperature inside the concrete will rise sharply. Because concrete is a poor conductor of heat, the temperature inside the concrete is difficult to transfer to the surface of the concr...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/20C04B2111/76C04B2201/52C04B18/142C04B18/08C04B14/386C04B18/146C04B18/027C04B14/06C04B14/02C04B2103/302C04B24/16C04B24/2623C04B24/32
Inventor 刘磊魏鹏陈军亮刘伟
Owner 天津金隅混凝土有限公司
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