Pump concrete and preparation method thereof

Abstract

The invention relates to the field of concrete, and particularly discloses pump concrete and a preparation method thereof. The pump concrete is prepared from the following raw materials in parts by weight: 280 to 400 parts of cement, 50 to 70 parts of fly ash, 80 to 100 parts of mineral powder, 585 to 680 parts of river sand, 1050 to 1110 parts of coated broken stone, 140 to 155 parts of water, 7 to 10.5 parts of an additive and 8 to 12 parts of modified composite fibers, wherein the modified composite fibers are prepared by mixing natural bamboo fibers and polyurethane fibers. The preparation method comprises the steps of weighing the coated broken stone, the modified composite fibers and the water, mixing and stirring to obtain a mixture; weighing and adding cement, fly ash, mineral powder, river sand and an additive into the mixture prepared in the step S1, preparing a concrete mixture after stirring and mixing, pumping and pouring the concrete mixture into a mold, and obtaining pump concrete after curing. The pump concrete has the advantages that the pump concrete is not easy to block a pipeline when being pumped, and the pump concrete has higher strength after being cured.

Description

technical field [0001] The present application relates to the field of concrete, and more specifically, it relates to a pumping concrete and a preparation method thereof. Background technique [0002] Pumping concrete is to use the pressure of the concrete pump to transport the concrete mixture to the pouring construction site through the pipeline. The pumping concrete has the advantages of good quality, high efficiency and fast speed, and can realize long-distance transportation; it is widely used in roads, Construction of railways, water conservancy, high-rise and super high-rise buildings and buildings. [0003] The long-distance transportation of pumped concrete requires the use of conveying pipes. Generally, in order to avoid coarse aggregates from clogging the conveying pipes, pebbles are often used as coarse aggregates, because pebbles have good pumpability, but in road construction, concrete needs to be pumped. It has high flexural strength, but the binding force be...

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Problems solved by technology

[0003] The long-distance transportation of pumped concrete requires the use of conveying pipes. Generally, in order to avoid coarse aggregates from clogging the conveying pipes, pebbles are often used as coarse aggregates, because pebbles have good pumpability, but in road construction, concrete needs to be pumped. It has high flexural strength, but the binding force between pebbles and cement is low, adding pebbles as coarse aggregate will make the strength of pumped concrete low, which is not suitable for road construction

[0004] If crushed stone is used as the coarse aggregate of pumped concrete, the binding force between crushed stone and cement is high, which can significantly improve the strength of pumped concrete, but the fluidity and workability of crushed stone are poor, and it is easy to medium clogged pipe

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