Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same

An ultra-high-strength concrete, ultra-high pumping technology, applied in climate sustainability, sustainable waste treatment, solid waste management, etc. Effect

Inactive Publication Date: 2008-12-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taking the eye-catching fly ash and slag as an example, the annual output of fly ash and slag in my country is currently about 300 million tons, and

Method used

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  • Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same
  • Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same

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preparation example Construction

[0040] 7. The ultra-high-strength concrete with ultra-high pumpability and its preparation method proposed by the present invention, the specific steps are as follows:

[0041] (1) Weigh the required cement, composite industrial waste residue, sand, and stone according to the formula ratio, and dry stir for 1 minute to make them evenly mixed together; (2) Weigh the high-efficiency water reducer, water-retaining thickening agent according to the formula ratio Mix the air-entraining component and water uniformly in the container; (3) Slowly add the prepared water agent to the uniformly mixed dry material, and stir in a mixer to form a uniform large fluidity concrete.

Embodiment

[0045] Embodiment 1-10, the present invention is not limited to following embodiment:

[0046] Use Jiangnan Onoda P.II42.5 Portland cement, Ganzhou medium-coarse river sand with fineness modulus M=2.8, Nanjing Liuhe 5-20mm continuous graded basalt crushed stone, Jiangsu Academy of Construction Sciences water reduction rate 35% The above polycarboxylate high-efficiency water reducer, Nantong Huaneng Class I fly ash, silica fume from Shanghai Elkem, and Jiangnan Cement Plant have a specific surface area of ​​600m 2 / kg of S95 finely ground slag. Pumping uses "Sany" drag pump.

[0047] 1m 3 The dosage of each component in ultra-high-strength concrete is shown in Table 1, and the corresponding physical properties, pumpability and mechanical properties are shown in Table 2.

[0048] Table 1 The dosage of each component of ultra-high-strength concrete

[0049]

[0050] Table 2 Physical properties, pumpability and mechanical properties of ultra-high-strength concrete

[0051]...

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Abstract

A super-high concrete with super-high pumping capability and a corresponding preparation method particularly relate to the super-high concrete with super-high pumping capability and the preparation method. The concrete is mainly used for high buildings, long-span bridges, high-speed railways, large-scale tunnels, ocean crude oil platforms, nuclear power engineering and defense engineering, etc. large-scale civil engineering. The concrete is composed of the following components by weight percentage: 11.9 to 16.2 percent of cement, 4.2 to 12.2 percent of compound industrial waste slag, 0.25 to 0.58 percent of super plasticizer, 0.16 to 0.25 percent of water-preserving thickening air-inducting component, 4.8 to 5.7 percent of water, 26.7 to 29.4 percent of sand and 41.6 to 44.3 percent of stone; wherein, the total amount of cementitious material (the total amount of cement and various industrial waste slag) is 500 to 615kg, and the compound industrial waste slag occupies 20 to 50 percent of the total amount of cementitious material; the water-cement ratio is 0.20 to 0.28; the super plasticizer occupies the 1.1 to 2.5 percent of the total amount of cementitious material, and the water-preserving thickening air-inducting component occupies 0.8 to 1.0 percent of the total amount of cementitious material, and the sand rate is 30 to 40 percent.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to ultrahigh-strength concrete with ultrahigh pumpability and a preparation method thereof, and is mainly used in high-rise buildings, long-span bridges, high-speed railways, large tunnels, offshore oil platforms, nuclear power projects, and protection projects and other large civil engineering projects. Background technique [0002] Concrete is the most used man-made building material in the world, with an annual production volume of up to 7 billion m 3 Above, basic projects such as dams, bridges, airports, highways, tunnels, port terminals, offshore and subsea buildings, underground buildings, industrial and civil buildings built with them account for about 70% of the world's total wealth. With the rapid development of the world economy and the rapid advancement of urbanization, urban land resources are becoming more and more scarce, and high-rise buildings have become...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/04C04B14/06C04B14/02
CPCC04B28/02C04B40/0039C04B2103/304C04B2103/46C04B2111/00146C04B2111/00724C04B2111/0075C04B2201/52Y02W30/91C04B14/068C04B14/106C04B14/14C04B18/08C04B18/141C04B18/146C04B18/24C04B20/0076C04B20/026C04B24/026C04B24/2641C04B24/383C04B14/06C04B14/28C04B2103/302
Inventor 张云升贾艳涛
Owner SOUTHEAST UNIV
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