C60 full-manufactured sand super high-rise pump concrete

Abstract

The invention discloses a C60 full-manufactured sand super high-rise pump concrete, which comprises the following raw materials by metering with mass in every cubic centimeters of concrete: 312-355kg of cement, 110-135kg of ore powder, 80-110kg of fly ash, 660-723kg of manufactured sand, 960-1027kg of cobblestone, 10.4-12.2kg of additive and 150-163kg of water. The concrete is characterized in that the fine aggregate employs the manufactured sand, the doping amount of industrial by-products of fly ash and ore powder exceeds 35%, 28 compressive strength can reach more than 70MPa, collapsed slump is greater than or equal to 240mm, the expansion degree is greater than or equal to 600mm, and slump cone falling time is less than or equal to 10s, so that pumping requirement of the super high layer(vertical height is greater than or equal to 200m) can be completely satisfied, natural sand resource pressure can be alleviated at certain degree, and the concrete provides the technical reference for preparing the full-manufactured sand super high-rise pump concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a C60 full machine-made sand super high-rise pumping concrete. Background technique [0002] At present, concrete is the largest building structure material for human beings, and it will still be one of the main building materials in the next 30 to 50 years. Sand is an important part of cement concrete. As we all know, every 1m produced 3 Concrete consumes about 2 tons of sand and gravel, plus the sand used for masonry mortar, and the amount of sand is about half of the amount of sand and gravel. Sand is divided into machine-made sand and natural sand. In many areas of our country, natural sand is still used as the fine aggregate of concrete. In some areas, natural sand and machine-made sand are mixed. In many areas, natural sand resources are gradually in short supply, and even no sand is available. The contradiction between supply and demand of natural ...

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Problems solved by technology

[0008] (3) In the literature "Research on the preparation technology of C60 artificial sand high-strength pumped concrete" by Gu Fang and Qi Jiangfeng, the mix ratio in Table 2 is used to prepare C60 artificial sand concrete, but 25% river sand needs to be mixed as fine aggregate (the literature says When 100% machine-made sand is used, it is easy to grasp the bottom, and the workability is not good), the crushed stone is 5-20mm crushed stone, the water reduction rate of the admixture is 30%, and the vertical pumping height is not mentioned

[0011] Nevertheless, there is still no public report on high-strength (C60 grade and above) super high-rise (vertical height above 200m) fully machine-made sand pumping concrete

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