A super-long underwater pile foundation machine-made sand self-compacting concrete and its preparation method

Abstract

The invention discloses an ultra-long underwater pile foundation machine-made sand self-compacting concrete and a preparation method thereof. The mass ratio of each component of the concrete is: cement 17.70-18.93, nano-scale spherical silica powder 0.82-2.06, micron-scale spherical silicon Quality powder 1.23-1.65, highly active silicon-calcium powder 0.82-2.06, A machine-made gravel 9.90-11.25, B machine-made gravel 23.09-26.26, machine-made sand 32.44-36.36, admixture 0.41-0.62, water 7.82-8.23, this Invention and optimization of high-quality raw materials, control of cement fineness, setting time, standard consistency and other indicators, so that the cement can meet the requirements of adjustable control of ultra-long underwater pile foundation setting time from 30 hours to 150 hours under the action of admixtures, applicable It is suitable for the construction of underwater pile foundation concrete with a length of more than 70m without flowing water, especially the construction of underwater pile foundation concrete with a length of 100m.

Description

technical field [0001] The invention relates to an ultra-long underwater pile foundation machine-made sand self-compacting concrete and a preparation method thereof, belonging to the field of building materials. Background technique [0002] The geology in Southwest my country is complex, and there are huge difficulties in the construction of key projects such as airports, expressways, and high-rise buildings, especially in the construction of ultra-long underwater pile foundations (ultra-long underwater pile foundations refer to underwater piles over 70 meters long. pile foundation) during construction. Especially when there are unstable layers, karst caves, and groundwater enrichment in the pile foundation construction area, the pile foundation construction has the characteristics of slow speed and long construction time. This has extremely high requirements for concrete. On the one hand, it is necessary to solve the problem of super long setting time and plastic retention...

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Problems solved by technology

[0003] The purpose of the present invention is to address the above problems, to provide an ultra-long underwater pile foundation machine-made sand self-compacting concrete and its preparation method, in order to solve the problem that pile Foundation construction has the characteristics of slow speed, long construction time, etc., the problem of insufficient concrete setting time and poor plasticity, in order to solve the strength and durability of concrete in the case of ultra-long retarding time, the invention is suitable for no flowing water, Concrete construction of underwater pile foundations with a length of more than 70m, especially suitable for concrete construction of underwater pile foundations with a length of 100m

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